How to fix polycarbonate - basic tips. How to fix polycarbonate correctly: a detailed guide How to take into account thermal expansion

• The technique of attaching polycarbonate to a metal frame allows you to use it to implement a wide variety of options for building structures, including canopies and roofing of domed and arched types.

  Some of the remarkable properties of polycarbonate that make it so attractive to the average user include:

  • transparency and strength;
  • lightness and flexibility;
  • the possibility of operation in a wide temperature range (from minus 45 to plus 120 degrees);
  • environmental safety and durability (service life up to 20 years).

  Let's add such an important detail as the ease of installation of coating elements from this material.

  In addition to all of the above, canopies of various classes, acoustic barriers, greenhouses, enclosing structures and much more are made from this material.

  Types of polycarbonate

  

  On the domestic market, there are two types of polycarbonate products (cellular or honeycomb and with a monolithic structure), each of which has modifications that differ in thickness and color of the material. They are made from the same raw materials, but have many structural and decorative differences.

  When choosing each of the known designs of polycarbonate, the following considerations (initial data) are guided:

  • the structure of the material (since honeycomb panels are hollow, they are lighter in weight and easier to install);
  • cost per square meter;
  • method of attaching polycarbonate to metal;
  • its decorativeness and attractiveness;
  • material durability.

  So, in the construction of greenhouses, canopies and canopies, preference is given to lighter cellular polycarbonate, and for decorative design of fences and other durable buildings it is more convenient to use monolithic panels.

  The cost of a polycarbonate sheet can be very different; it all depends on the modification, thickness and dimensions of the proposed product. At the same time, each user chooses the price range that he can master (not to the detriment of the quality of the purchased material).

  Regarding the question of how to attach polycarbonate to metal, it should be noted that each such product is accompanied by an instruction that describes in detail the procedure for its installation. Due to the variety of its shapes, this material allows you to create complex and original designs with fastening mainly on a substrate (frame or profile).

  Mounting features (installation standards)

  

  High strength characteristics of structures made of this material are achieved with the appropriate orientation of the hollow channels included in its structure. So, with vertical installation of polycarbonate panels, the greatest strength is provided by their orientation from top to bottom, and for curved structures - parallel to the bend contour. For inclined elements, maximum rigidity can be obtained by placing sheets in the direction of the slope.

  For external installation of such products, as a rule, polycarbonate with a protective coating that protects against UV radiation is used. All information on the type of protection and the method of laying the panels is usually given on the protective film, so it is not recommended to remove it until the installation of the products is completed.

  

  Before attaching polycarbonate to metal, you need to familiarize yourself with the restrictions on the permissible parameters of its installation, such as, for example:

  • the angle of inclination with a standard sheet length should not exceed 5 degrees, and with a blank length of more than 6 meters, this figure can be increased;
  • the bending radius during the formation of arched structures according to the specifications cannot be more than 150 nominal thicknesses of the panel itself;
  • the diameter of the holes prepared for fastening is generally selected 3 mm larger than the same size for the fastener.

  In addition, the list of restrictions specifies the type of hardware (fasteners) or polymeric materials used to fix workpieces, the procedure for installing gaskets, and much more.

  Preparatory activities

  

  Before attaching polycarbonate to a metal frame, we advise you to pay attention to the fact that the following set of tools will be required for mounting sheets:

  • hacksaw for metal;
  • electric drill with a set of drills and a screwdriver;
  • sharpened mounting knife;
  • measuring and marking tool (ruler and pencil).

  In addition, before starting work, you should prepare self-tapping screws with a galvanized tip (or stainless steel) and a set of thermal washers that ensure a reliable sealing of the joints.

  Even before their implementation, you also need to pay attention to the following points:

  1 There are two types of polycarbonate fastening: frame and profile. In the first case, a frame with grooves up to 25 mm deep is used, made of wood, metal or plastic. The internal dimensions of this design are selected in accordance with the dimensions of the workpiece used (taking into account the necessary clearances). When choosing the second option, special guide profiles are used for fastening. 2 Fixing on the profile frame can be done in two ways. This is the so-called "wet" method, which involves the use of special putty and sealants, and the "dry" method (using self-tapping screws, screws and bolted joints). 3 Self-tapping screws are screwed in perpendicular to the laying plane so as not to deform the material by excessive pressure. 4 During installation, it is mandatory to use sealing elements made in the form of rubber gaskets without plasticizers or a plastic profile.

  

  Gluing sealing gaskets to polycarbonate, as well as attaching it directly to metal, is not allowed.

  5 The step of fixing the gaskets is 50 cm (taking into account the two-centimeter indent from the edge of the frame). 6 When working with the “wet” method, you can use polyamide glue or double-sided adhesive tape (for lightweight structures). For outdoor installation, weather-resistant silicone compounds are used. 7 Before gluing prefabricated elements, their surfaces are degreased with a solvent, which is usually isopropyl alcohol.

  When describing the upcoming work, we will consider the option of profile fixing of workpieces on a metal frame using the “dry” fastening method.

  Direct mounting of polycarbonate blanks

  

  • Then, the sheets are marked in accordance with the dimensions of the already mounted profile frames, on which the attachment points are pre-marked and holes for polycarbonate are drilled.
  • Before mounting the blanks, special sealing gaskets are placed in the profiles, fixed in an arbitrary way (but not with glue).
  • Already marked sheets with holes drilled in the appropriate places are mounted on these gaskets.
  • At the final step, it remains only to fix the workpieces laid on the gaskets with self-tapping screws, trying to maintain an even cut line.

  In conclusion, we note that situations are not uncommon when, during operation, an incorrectly fixed sheet is torn off by the wind and destroyed. To restore the surface of the structure, it is necessary to remove the remains of the destroyed material, lay new seals along the guide profiles, and lay a pre-prepared sheet of the required size on top of them. The fastening of a new workpiece is carried out by the method we have already considered.

Cellular polycarbonate is a modern material that is widely used for greenhouse cladding. It allows you to quickly and inexpensively obtain reliable translucent walls.

In this article we will tell you how to properly attach polycarbonate to a greenhouse.

Benefits of polycarbonate

Like any material, polycarbonate has both its pros and cons.

• Its main advantages include:
• Flexibility and impact resistance - it is about 20 times better than glass.
• This material does not contribute to combustion and has good thermal insulation due to closed air cells.
• The optimum ratio of price and quality. The average price for a 4 mm sheet 210 * 6000 cm is 1500-1800 rubles.
• He is not afraid of moisture, high and low temperatures, sudden changes in humidity.
• This material is lightweight, so you will not have any problems how to fix a polycarbonate greenhouse to the ground. The simplest foundation or a wooden frame nailed to the ground on long reinforcement is enough.

The main disadvantage of this material is:

• Low abrasive resistance, easy to scratch.
• It is also destroyed by ultraviolet rays, so to avoid this, manufacturers protect it with a special film.
• During installation, it is necessary to take into account the presence of a thermal gap so that during temperature changes, the casing can freely expand and contract.

Sheet arrangement

The stiffening ribs in cellular polycarbonate are located along the length of the sheet, therefore, when fastening, they must be positioned in such a way that the channels have an outlet to the outside. This is necessary to remove the resulting condensate inside. That is, on vertical walls, the stiffeners should be vertical, on arches along the bend of the arc.

Modern polycarbonate is made with a special protective film, which usually indicates the markings and logos of the manufacturer. A layer with such a film must be laid outside. It is better to remove it after fixing the polycarbonate on the greenhouse.

Also, when mounting on arched structures, it is impossible to exceed the maximum allowable bending values ​​of sheets set by the manufacturer.

cutting

The process of cutting sheets is one of the main ones, because this material is usually supplied in the form of long sheets. Their standard size: width 210 cm, length 6 or 12 m.

The cutting process itself is very simple, for this you can use a regular hacksaw or a power tool: a jigsaw, a circular saw. The protective film will protect the surface from scratches during cutting.

After cutting the desired sheet, you should carefully remove all the chips from the internal cavities, it is best to use a vacuum cleaner for this. This is necessary so that condensation does not accumulate inside.

Hole drilling

Ordinary drills are suitable for drilling, but the holes must be made between the stiffeners, as well as at least 4 cm from the edge of the panel. The size of the holes should be 1-2 mm larger than the diameter of the self-tapping screws to create a temperature gap.

Note!
When installing long sheets exceeding 6 meters, it is necessary to stretch the size of the holes along the length so that they turn out to be oval.

The drilling angle must be perpendicular, otherwise it will not be possible to fix the self-tapping screw with the washer evenly. In this case, the tightness will be broken, the attachment point will be unreliable, and the thermal insulation will deteriorate.

Panel fixing

Fastening polycarbonate to a metal greenhouse frame can be done in two ways:

• Using a self-tapping screw with a washer and a sealing gasket.
• With the help of a thermal washer.

Outwardly, the thermal washer looks like a mushroom cap and consists of two parts: a sealing and an upper plastic one. In the center it has a through hole for a self-tapping screw head. In addition, the plastic leg, which is selected according to the thickness of the coating, prevents the bolt from being overtightened.

After fastening the self-tapping screw, a special cap is put on it, which hides it. Thus, the self-tapping screw is protected from the effects of the external environment and the cold bridge is removed. You can see its structure in the photo:

How to fix polycarbonate on a wooden greenhouse? This is done in exactly the same way, the difference with the metal frame is only in the screws used. In this case, it is better to use ordinary roofing washers for this, since they are cheaper than thermal washers.

For metal, they usually take self-tapping screws with a drill tip, and for wood with a sharp end. They should be 4.2 mm in diameter with a press washer. For fastening to wood, a screw length of 25 mm will suffice, and for flat metal profiles - 13 mm. Fastening should be every 30-40 cm.

Note!
When screwing self-tapping screws, do not rigidly fasten them, overtighten them, or use nails, rivets, or unsuitable washers for fastening.

Cell sealing

Before attaching polycarbonate to the frame of the greenhouse, you need to carefully seal its ends. The upper end must be sealed with ordinary self-adhesive tape. From below you need to stick the tape, and make holes in it for the condensate to escape.

Panel docking

For proper joining of polycarbonate with each other, you need to use special component profiles.

• A simple connecting profile for joining two panels. In this case, the profile itself is not attached to the crate.
• Composite connecting profile allows you to connect 2 panels and fasten them to the crate.
• The end profile is needed to seal the end of the panels.
• The wall profile allows sealing the ends and fixing the edge of the panel to the wall.
• Corner profile - for mounting perpendicular corners.
• Ridge profile - for creating a joint on gable roofs of various angles.

Instructions for attaching polycarbonate to a greenhouse are shown in the video in this article:

• Between the polycarbonate sheet and the metal, you need to bake from a heat-insulating tape.
• For fastening to First, its lower part, the so-called base, is screwed to the frame, and then a panel is inserted into it. Before that, you need to remove the lower protective film, and bend the layer of the upper film by 10 cm so that it does not interfere with the installation.
• If fastening takes place on the edge, then from its extreme part, close to the composite profile, you need to install an end or wall profile.
• Then you need to fix the upper part of the composite profile, by simply snapping into the base. Between the profile and the panel you need to leave a temperature gap of 3 mm.
• For fastening against the wall, a wall profile is used. It is put on the end of the panel, and its second part is attached to the wall with sealant.
• Immediately after the installation is completed, completely, otherwise it will stick to it even more strongly.
  
• When mounting arched surfaces, the length of the profile must be greater than the length of the panels, as their size may differ. The excess is cut off after installation.

Conclusion

The presence of a large number of components for polycarbonate will allow you to do the installation yourself without difficulty. (see also article) All joints will be neat and tight.

In construction, more and more craftsmen prefer such material as polycarbonate. It has to do with durability and strength. Even natural influences are not dangerous for such structures. The operation of the material does not cause difficulties, but has its own nuances. Therefore, it is worthwhile to figure out in advance how to attach polycarbonate to a metal frame.

A monolithic or cellular variety of polycarbonate is produced. A monolithic thermoplastic is a solid panel. Outwardly, it is similar to glass, although it is flexible and highly impact resistant, with reduced weight. Inside, the honeycomb-type structures have cells with partitions, which simultaneously perform the function of stiffeners. These are light and transparent types of plates. Excellent thermal insulation properties are becoming especially important for summer residents and gardeners. The profile for attaching polycarbonate must also have some characteristics.

Getting ready for work

The main thing is not to forget about the tools and materials needed for installation:

1. Hardware. With the same function, you can use thermal washers or self-tapping screws;
2. Power tools. Let's allow any option - in the form of electric jigsaws, screwdrivers, drills;
3. Mechanical action tools, including screwdrivers and drills, electric jigsaws;
4. Profiles of different types, contributing to the creation of a strong attachment;
5. polycarbonate sheets.

Separate preparation is also required for the polycarbonate panels themselves:

• Each sheet must be correctly oriented in space;
• Creation of accurate markups, according to the initial project. After that, go to the incision;
• The ends of the sheets of the graded material are sealed. It is necessary to take into account the deformation from the effects of heat, the possible bending in the future;
• It is necessary to separately assemble the elements that require assembly before the installation begins; after that we fix the polycarbonate to the profile.

Profiles or thermal washers become the main elements during fastening. Profiles contribute to the formation of detachable, one-piece connections.

One-piece profile option will look good in a small area. This is a cheap option with many colors. The size of the slope is one of the main parameters when working with this material. The maximum indicator is three meters. But the solid sheet also has the disadvantage of poor flexibility. Because of this, the structure can be easily damaged during operation.

Polycarbonate is attached using one of two methods - wet and dry.

1. Wet involves the use of putty;
2. The use of the dry method involves mechanical fastening of the parts; For example, a thermal washer for polycarbonate is used, any home master will understand how to fix it.

When it comes to the wet version, the sheet around the perimeter is treated with polymer putty. The sheet itself then fits into the groove of the frame. It is necessary to observe the necessary clearances, and then press one part to the other. At the last stage, it remains to remove excess putty, use sealant to process the joint. Rubber acts as an excellent sealant if necessary to connect the material to the metal.

It is acceptable to combine both methods to provide better results. Then the processing of the rubber gasket is carried out:

• polymer materials;
• Scotch tape;
• Sealing tape;
• silicone compounds.

For dry mounting, other methods and other materials are used.

Holes and grooves of the threaded type are used when connecting polycarbonate to the base. Plastic sealants or rubber strips will help seal the product.

The main feature of the method is that the sheet is located along an arc allowed by the manufacturers. It is supposed to use grooves with tolerances that initially assume the appearance of deformations from heat.

The use of the point method is relevant for monolithic products. Self-tapping screws and bolts with nuts are the main tools, although you can choose more expensive thermal washers. The design goes through several stages, it is supposed to maintain a 50-centimeter gap between the holes.

The first step is to create a hole on the edge of the sheet. The diameter of the hole, compared with the parameter of the connecting hardware, is set larger, by 2-3 centimeters. A self-tapping screw or bolt will help hold the materials together, you just need to use a screwdriver or screwdriver. Polycarbonate needs to create reliable fasteners.

Cellular polycarbonate: how to work with it

Installation is carried out according to the rules different from working with monolithic products:

1. The stiffening ribs must be positioned so that no obstacles are created when the accumulated condensate liquid flows out. Even the arched version provides that stiffeners are located in the structure;
2. End edges require additional protection from the environment. Adhesive tape, plastic frost-resistant materials will cope with the task;
3. At the top there should be a side that is intended for this, and is provided with a special marking;
4. On both sides, you need to save the protective film, if possible. It is removed when the installation is completed.

The mounting sequence is described as follows:

• The frame and bases of the prefabricated profile are connected with self-tapping screws having a 30-50 centimeter pitch;
• Sheets are stacked on the profile. The material must be prepared in advance. The gaps should be small, 2-5 mm. This helps prevent thermal warping;
• A profile cover is laid on the base. Then everything clicks down.

When fastening, self-tapping bolts are indispensable helpers, you just need to observe the gaps. To do this, you need to perform the following actions:

1. Drill holes in the frame. The edge of the material is laid on top, with a release of 4-5 cm. It is necessary to create coaxial holes between the stiffeners;
2. Self-tapping screws and washers help to mount and connect the plates to each other.

At this stage, the work is considered completed.

About the types of profiles, their purpose

The processing methods used depend on the design:

These are the main types, although there are various models in stores. Polycarbonate mount allows different types.

Supports or battens for fastening panels

Additional fasteners are required if the material covers a large area.

Small dimensions allow the use of polycarbonate to cover the surface with the additional use of double-sided tape, polyamide glue. Silicone adhesive is suitable for outdoor use. It is more resistant to atmospheric precipitation or phenomena. When cellular polycarbonate is used, the mount may be different.

Polyurethane-based adhesive is used if increased transparency is important. Before using it, the surface must be degreased.

Thermal washers and plugs

Fastening polycarbonate to a metal frame with thermal washers involves the use of different parts. Elements are distinguished by the following features:

1. Mini washers. Used in conjunction with panels of small length;
2. Manufacturing material. Thermal washers can be based on stainless steel, polycarbonate, polypropylene. The latter make the connections airtight without violating the structure, and the latter are relevant for interior work, or the presence of shadows;
3. By design, parts are universal, individual. The second option does not have a leg, which allows it to be used when working with any parameters.

Plugs are used to give the structure an attractive appearance, protection against water and small animals getting inside.

Fixing panels to awnings

Polycarbonate can change properties when exposed to high temperatures. Therefore, you need to follow the rules:

• Correct types of profiles;
• High-quality thermal washers;
• Enlargement of holes during installation;
• The presence of gaps.

The acquired material also requires storage in accordance with all the rules. You need to find out about this before you figure out how to fix polycarbonate to a metal frame.

1. The first step is laying the sheets on a flat surface. The protective film remains at the top;
2. For one stack, the maximum height is 2.5 meters;
3. Storage involves the location of the material away from heating devices. The room must be dry and ventilated;
4. Do not use polyethylene on top of the material.

Protective coatings are removed from the panels only at the end of the installation work. It doesn’t matter what decision is made about how to fix polycarbonate.

The quality of the work performed depends on how compatible the materials are. Polyurethane and PVC, amine and acrylic sealants are not compatible with polyurethane.

There are a number of factors to consider when designing frameworks:

• The direction in which the water flows;
• The presence of a bend with an acceptable radius;
• Dimensions of structures;
• Temperature impact;
• The presence of different types of load.

From +10 °C to + 20 °C are the optimal conditions for creating polycarbonate structures. Supports are used if it needs to be moved on the surface. A soft fabric cover would be the best solution. Then the fasteners for polycarbonate will also last a long time.

Conclusion

Simplicity and ease of use, together with the low weight of the panels, have made polycarbonate a really popular material. In addition, it involves a wide choice of materials used for fastening. Even novice home masters will cope with the installation, with little or no outside help. Quality can satisfy any needs of customers, as well as a large assortment of colors.

The main thing is to choose a product that meets the needs in terms of thickness and workmanship. The frame and some of the intricacies of fastening will not hurt to study before making a purchase.

When talking about polycarbonate in everyday life, they usually mean sheet thermoplastic polymer material, widely used in modern construction, various industries, advertising and in everyday life. There are two types of polycarbonate sheets on the market - monolithic and cellular. Monolithic polycarbonate is a solid translucent sheet that looks like glass, only much stronger and lighter. It has high impact resistance with good flexibility. Cellular polycarbonate is a hollow sheet, the internal structure of which is a multilayer structure with longitudinal stiffeners.

Polycarbonate sheets have high impact resistance as well as excellent flexibility.

Monolithic polycarbonate is most often used instead of glass in educational and medical institutions, gyms, swimming pools. Showcases are equipped with it in shopping centers. Cellular polycarbonate is mainly used in utility and household buildings. In the field of individual construction and summer cottages, this material is used as a coating for greenhouses, greenhouses, greenhouses, translucent canopies and other similar structures. The solution to the question of how to fix polycarbonate depends on the design in which it will be used and the operating conditions.

Methods for fixing monolithic polycarbonate

One of the ways to fasten polycarbonate is fastening with thermal washers.

The use of this material instead of glass for translucent barriers, partitions, shop windows also implies its fixing using structures used for ordinary glass. These are either frame structures into which the sheets are inserted and then fastened, or holders of various designs, with which the sheets are fixed in the desired position. There are "wet" and "dry" methods of installation and fastening of monolithic polycarbonate.

With the “wet” method, a compatible polymer putty is applied around the entire perimeter of the frame and the edge of the material, the sheet is installed in the frame. Then the joints are additionally treated with a silicone-based sealant. It is also possible to use rubber strips or special profile gaskets for complete sealing.

In the "dry" method, only mechanical means of fastening are used, which are various profiles and other elements in combination with rubber gaskets, profiled seals. In order to fix the sheets with the help of these means, threaded connections (bolts, nuts), self-tapping screws and other similar elements are used. This method of fixing sheets is cleaner, neater. In order to properly fix the sheets with both methods of fastening, it is necessary to provide clearances for possible thermal expansion of polycarbonate in order to avoid its deformation or destruction.

Before starting installation, it is necessary to drill holes in the polycarbonate sheets for fastening to the frame.

The use of monolithic polycarbonate as translucent coatings in frame structures (in greenhouses, greenhouses, verandas), both vertically and on the roof, allows you to attach sheets to the frame using conventional fasteners (bolts, screws, self-tapping screws) using rubber sealing washers. The fastening step along the frame should be approximately 500 mm.

In the sheets, it is necessary to pre-drill holes with such a step. From the edge of the sheet, the hole must be at least 20 mm and 2-3 mm larger than the diameter of the fastener to compensate for thermal changes in sheet dimensions. It is convenient to drill holes in polycarbonate with wood drills at low speed, controlling the heating of the drilling zone. Fastening according to the rules ensures a snug fit of the sheets to the frame, but without excessive tightening of the fasteners. The pressing force of the sheet and the size of the hole for fasteners should not prevent the "temperature" displacement of the sheet.

Ways of fastening cellular polycarbonate

The easiest way to mount this type of polycarbonate is point mount. For it, self-tapping screws with special thermal washers are used. At the same time, reliable fastening of sheets, sealing of the fastening point, elimination of the “cold bridge” and prevention of sheet crushing are achieved. All this is ensured by the use of a thermal washer, consisting of a plastic washer with a leg, a sealing washer and a cover that closes the hole for the self-tapping screw.

The leg of the plastic washer should be equal to the thickness of the sheet, and the hole in it under the leg should be 2-3 mm larger than its diameter. In sheets of great length, the holes for the legs are made oval along the stiffeners. The step of fastening the sheet is about 400 mm. It is unacceptable to tighten the self-tapping screws very tightly until the sheet is crushed. From the edge of the sheet, self-tapping screws are installed no closer than 40 mm.

Panels stacked in several rows with a large coverage area are joined together by special joint profiles.

With their help, the edges of the panels are also fastened. Profiles are one-piece and detachable. One-piece profiles are fastened to the frame using self-tapping screws with thermal washers, similar to the point fastening of sheets. The edges of the panels are clamped with profiles, and, if necessary, they are attached to the intermediate elements of the panel frame by a point method.

The detachable profile for fixing polycarbonate has two parts - a “base” and a “cover”. The “base” is attached to the frame with self-tapping screws with a pitch of approximately 300 mm. The panels are stacked so that each goes into the “base” by about 20 mm. The “lid” of the profile is installed on the base and snaps into place when pressed or with light blows of a wooden (plastic) mallet. Detachable profiles are made of both polycarbonate and aluminum.

In addition to docking profiles, there are also special profiles for fastening panels in places where the frame configuration changes. To attach the panel to the wall, a wall profile is used. In order to connect and fix the panels at an angle to each other, corner profiles are used. And for the design of the ridge on the roof, a ridge profile is used. Unlike wall and corner, it can be mounted at different angles in accordance with the slope of the roof.

What must be firmly remembered

In all cases of joining panels to each other, with connecting profiles and other structural elements, one should remember about the change in the linear dimensions of polycarbonate under the influence of ambient temperature. In order to properly fix the panels and prevent their deformation and breakage, it is enough to provide thermal gaps in all, without exception, places of possible contact of polycarbonate with neighboring elements. Practice has established a minimum gap of 3.5 mm per meter of panel length in any direction. And it is unacceptable to clamp the panels with fasteners, leading to thermal stresses.

Holes for fasteners in cellular polycarbonate should be drilled in the middle between the partitions, but in no case in the partition itself. For cellular polycarbonate with a thickness of 4-10 mm, the use of thermal washers for point fastening is mandatory. Panels with a thickness of 16 mm or more are recommended to be fixed in ways that exclude the use of thermal washers, for example, using special profiles. Special components allow you to properly mount the structure, give it a beautiful look and ensure durability.

How to fix polycarbonate correctly

The question of how to fix polycarbonate is inextricably linked with the design in which it is used. Mounting options for monolithic and cellular polycarbonate are discussed in detail in the proposed article.

How to fix polycarbonate to a wooden frame?

Polycarbonate is an inexpensive, but practical and durable polymeric translucent material, which has recently been widely used in construction. It is used to create roofs of gazebos, sheds, construction of greenhouses and greenhouses, decorative glazing, as well as advertising structures and elements of urban infrastructure. Polycarbonate with ultra-light weight has a high bearing capacity, so it can be mounted on a base made of inexpensive wood or a more durable metal profile. In this article, we will tell you how to properly attach polycarbonate sheets to a wooden frame in order to avoid damage to the material.

Material Features

Polycarbonate is a modern building material, it belongs to the group of polymeric thermoplastics, which includes carbonic acid and bisphenol A. It has high light transmission up to 92%, which is not inferior to that of silicate glass, flexibility, high load-bearing capacity and strength, as well as low thermal conductivity . The following types of polycarbonate are produced:

• Monolithic. Monolithic type polycarbonate plastic in appearance resembles ordinary silicate glass. It has a smooth surface, high transparency (up to 92%). The technical and operational characteristics of this material are far superior to those of glass, as it retains heat better, is much stronger and more durable. Monolithic polycarbonate is fixed to the frame only in one plane, since it bends worse than a cellular one.
• Cellular. Honeycomb-type polycarbonate plastic differs from monolithic cellular structure with internal stiffening ribs filled with air. It has lower thermal conductivity, is lighter in weight, bends better, but is considered less durable. Cellular polycarbonate can be attached to a metal or wooden frame, as it is suitable for creating figured, curvilinear structures.

Important! Experienced craftsmen note the high strength, wear resistance and durability of polycarbonate plastic, combined with an affordable price and light weight. To maximize the potential of this practical material, it is necessary to strictly observe the technology of mounting the coating to the base.

Fastening rules

To create a roof, canopy or other structure made of polycarbonate, you need to create a reliable frame. The material belonging to the group of thermoplastics, with a high bearing capacity, is light in weight, so it can be mounted on wood or metal. The use of wooden support elements reduces construction costs while reducing the life of the structure. When installing polycarbonate on a natural wood frame, experienced craftsmen recommend following these recommendations:

1. When creating a design project and cutting the material, it must be taken into account that the condensate must drain through the cells of the cellular polycarbonate and then evaporate.
2. When attaching polycarbonate plastic to a pitched structure, the stiffeners should be located along the slope, with vertical glazing - vertically.

Note! The service life of polycarbonate plastic, depending on the quality and type of material, is 10-25 years, and a wooden frame without special treatment will last no more than 5-10 years. To prevent rotting and deformation of wood, the frame is impregnated with antiseptic agents.

Required Tools

Mounting polycarbonate among professional builders is considered an easy task that even an inexperienced craftsman can handle. The advantage of this material is that it does not require expensive equipment or special tools to work with it. To fix polycarbonate sheets on a wooden frame, you will need:

• Polycarbonate. The standard sheet width of this material is 2100 mm, and the length is 3, 6 or 12 m.
• Drill with a set of drills. For outdoor installation, it is easier to use electric models with a powerful battery.
• Screwdriver or screwdriver to tighten the fasteners.
• Galvanized self-tapping screws with washer and rubber seal. A rubber seal seals the hole made in the material, and the washer protects the polycarbonate from cracking while tightening the fasteners.
• A connecting strip that is used to tightly connect sheets of material to each other.
• Tape for insulating the ends of polycarbonate plastic, necessary to protect against moisture leakage.
• Hammer, nails and timber 5 cm thick, impregnated with an antiseptic composition, for mounting the frame.

Please note! Professional craftsmen never use nails, riveting or washers of too large diameter to fasten polycarbonate. In order not to damage the material, which also expands under the influence of temperature, the self-tapping screws are not completely twisted, leaving a gap of 1-3 mm.

Fastening technology

Before starting to fasten sheets of polycarbonate plastic, a frame is assembled from a wooden beam impregnated with an antiseptic composition. The elements are placed so that a support is located under each joint of the sheets. Fastening polycarbonate to a wooden base is carried out as follows:

1. Carry out the cutting of sheets, cutting into the desired size using a circular saw or a special knife. The incision is made strictly between the stiffeners.
2. The first sheet of polycarbonate is placed on the frame so that it protrudes forward by 0.3-0.5 mm. Before installation, the ends of the sheet are protected with a special sealing tape.

Note! Subject to the rules for fixing polycarbonate plastic and recommendations for preparing a wooden frame, such a design will withstand even intense loads, having served for at least 15-20 years.

How to fix polycarbonate to a wooden frame

How to fix polycarbonate to a wooden frame? Features of working with the material and the rules for mounting polycarbonate plastic on a wooden base

How to properly fix polycarbonate

• Mounting monolithic polycarbonate
• Installation of cellular polycarbonate
• Panel fixing
• One-piece profiles
• Split profiles
• General recommendations

Today, polycarbonate is becoming more and more popular in industries such as construction, advertising, engineering. A variety of colors, strength, flexibility and easy installation of the material attract many people. There are two types of this material: monolithic and cellular polycarbonate. The fastening of cellular polycarbonate is slightly different from the fastening of a monolithic one.

Installation diagram of the sealing tape at the end of the panel.

Often, the owners of private houses do not want to involve third-party organizations and want to do all the installation work with their own hands. In this case, the question inevitably arises: how to fix polycarbonate? Next, the nuances and rules of installation of each type will be considered.

Mounting monolithic polycarbonate

For work you will need the following inventory:

• roulette;
• building level;
• electric jigsaw or circular saw;
• drill;
• drill;
• screwdriver;
• polycarbonate sheets;
• self-tapping screws;
• gaskets;
• thermal washers;
• silicone sealant.

So how to fix polycarbonate?

Polycarbonate can be installed on a prepared frame of an inclined or pitched structure using a “dry” or “wet” method.

"Wet" fastening is carried out using polymer putty, which is distributed along the perimeter of the frame. Then a polycarbonate sheet is laid on it, leaving gaps (about 2 mm) for temperature differences, and strongly pressed against the base, removing all excess putty. Instead of polymer putty, rubber strips (gaskets) can be used.

Scheme of a fence made of monolithic polycarbonate.

Sheets are fixed at the corners or along the longest sides. The peripheral part (joints) is treated with silicone sealant. To give the structure a more finished look, silicone can be covered with wooden planks or plastic corners. This method of fastening is used for wooden or metal frames.

In the case of attaching monolithic polycarbonate to heavy-duty steel frames for sealing inside and outside, a rubber seal is first laid, and then a layer of sealant is applied.

The "dry" method of installation is more widespread. It looks much neater and cleaner. It is used on large areas of coverage. In this case, profiles, seals and covers with rubber gaskets are used, and adhesives are not used. All connections are made with bolts, nuts and screws.

This method of fastening is practiced in the case of the installation of partitions, soundproof barriers or light locks. The system is arranged in such a way that moisture, getting on the top layer of protection, does not reach the inner lining and flows down through the drainage channels.

When designing, special attention must be paid to the aspect ratio of the structure. The best option for glazing is a square. If the shape is rectangular, then with an increase in the dimensions of the parallel sides, the strength of the sheet decreases, and the load exerted on it increases in direct proportion to the increase in length.

Monolithic polycarbonate has a high coefficient of thermal expansion, as a result, it is necessary to leave large gaps that will eliminate deflections and distortions of the sheet.

Scheme of the device of cellular polycarbonate.

Polycarbonate differs from glass in that it flexes a lot. But when glazing it will not affect. All deflections will disappear after the loads are removed. Flexible plastic requires a deep fit and increased grooves. This will help to securely fit the polycarbonate and avoid the sheet falling out during strong deflections.

Installation of cellular polycarbonate

Cellular polycarbonate is used for the construction of pitched or arched roofs with a slope of 25-30% (at least 11%).

This material is easy to drill and cut. Cellular polycarbonate, having a thickness of 0.4-1.0 cm, can be cut even with a knife. But for a straight, smooth cut, it is better to use a circular saw or a jigsaw.

When attaching cellular polycarbonate to the roof, ordinary drills are used for drilling. Holes are drilled between the ribs at a distance of not less than 4 cm from the edge. To eliminate vibration, the sheets must be held while cutting. After cutting, all chips and debris are removed from the panel cavities.

The ends are sealed with profiles made of aluminum or polycarbonate, similar in color. Such profiles are distinguished by their durability and strength. They are tightly fixed at the edges and do not require additional fastening. If the profile is without perforation, holes are drilled in it to drain the condensed moisture.

The upper ends of the cellular polycarbonate, installed vertically or obliquely, are sealed with aluminum tape, and the lower ends are closed with perforated tape, which prevents the penetration of dust and ensures the removal of condensate.

At the arched structure, both ends are closed with perforated tape. Leaving the end open reduces its durability and transparency.

Scheme of installation of cellular polycarbonate.

It is strictly forbidden to seal the ends of the sheet with adhesive tape and hermetically close the lower edges!

In a sheet of cellular polycarbonate, stiffeners are located along the length of the panel, so the structure is built so that the moisture condensed inside flows through the channels, leading out:

• if the installation is vertical, then the stiffeners must go vertically;
• if pitched - by slope;
• in the design in the form of an arch, the ribs are arranged in an arc.

The permissible value of the bending radius must be specified in the instructions supplied by the manufacturer.

Panel fixing

Cellular polycarbonate is fixed to the frame pointwise using self-tapping screws and thermal washers.

The thermal washer is a plastic sealing washer on a leg with a height corresponding to the thickness of the panel and a lid with a latch. It ensures the reliability and tightness of the fastening of the panel. The leg of the thermal washer, adjacent to the frame, prevents the panel from collapsing. The hole for it should be a little wider to protect against thermal expansion. Distances between fasteners - 0.30-0.40 m.

To prevent deformation of the sheet, it is forbidden to fix the panels rigidly or overtighten the screws!

To install cellular polycarbonate with their own hands, they use detachable or one-piece, colored or transparent polycarbonate profiles.

One-piece profiles

The panels are inserted into a special groove in the profile, which must correspond to the thickness of the sheet. The profile is attached to the support using self-tapping screws and thermal washers.

Split profiles

Scheme of fastening of one-piece profile.

The detachable profile consists of a "base" and a top snap-on cover. To mount a detachable profile, holes are drilled in the “base” slightly larger than the diameter of the self-tapping screw in increments of 0.30 m. Then the profile is attached to the frame support. A sealant is applied to the “base”, sheets are laid, taking into account a thermal gap of up to 5 cm, a profile cover is placed on top and snapped in with a wooden mallet. The ends are closed with a special plug.

To fix cellular polycarbonate at a right angle, corner profiles should be used. They will perfectly hold the panel and hide the flaws of the corner joint. When the sheet adjoins the wall, a wall profile is used. For the roof ridge, a ridge profile is purchased with a grip of up to 4 cm. It will firmly connect the sheets with any thermal expansion.

When mounting polycarbonate panels, thermal expansion must be taken into account. Light or transparent sheets heat up less than colored ones by 15%!

1. The surface of cellular polycarbonate is very sensitive to mechanical impacts. Therefore, it is not necessary to remove the protective film from the sheet when attaching.
2. Polycarbonate cannot be overly clamped.
3. Small holes drilled in the bottom profiles allow for natural air circulation. In most cases this will be sufficient to prevent steam from condensing in the channels. The top end must be hermetically sealed.
4. Before installation, the material must be kept for several days in a dry room. Then the ends are sealed with aluminum tape. If there is moisture in the panels, it can be removed by blowing the honeycomb with compressed air.
5. It is impossible to lay vapor-tight materials (for example, various films) on top of cellular polycarbonate. The evaporating moisture will form a thin water layer between the film and the polycarbonate. As a result, bubbles may appear, the film may peel off or the metallized layer may blacken.
6. The design of honeycomb polycarbonate roofs must take into account a slope of at least 5° (approximately 9 cm per 1 linear meter) to ensure rainwater runoff.
7. Walking on the panels is strictly prohibited. If necessary, boards are used, which should be supported by several edges of the panel.
8. As far as possible, sheets should be stored in a room isolated from external natural factors. Intense exposure to sunlight can cause the surface of the sheet to adhere to the film.

Having made the correct calculation of the amount of materials at the design stage and following the above instructions, the installation of the structure and fixing the polycarbonate with your own hands will not cause any problems.

How to fix polycarbonate? This question is asked by many owners of private houses. There are "dry" and "wet" methods.

How to fix polycarbonate: methods, instructions

Polycarbonate is a modern thermoplastic polymer material produced in the form of sheet blanks of a given size and widely used in industry and everyday life in the manufacture and decoration of light structures. Products made of thermoplastic polymers can be conditionally divided into two groups, one of which is monolithic polycarbonate, and the other is cellular.

Cellular

Polycarbonate products are made in the form of a homogeneous sheet material that resembles ordinary glass in appearance. Like glass, they do not retain light rays, significantly surpassing it in terms of strength and reliability. In addition, products of this class are characterized by high resistance to impact loads, as well as ductility and flexibility of the starting material.

Cellular polycarbonate is produced in the form of multilayer sheet blanks with internal voids reinforced with special stiffening ribs. Thanks to this original structure, products made of cellular polycarbonate are distinguished by high impact strength, which does not prevent them from being quite flexible and easy to install.

Monolithic

Note that monolithic polycarbonate is widely used as a glass substitute in institutions of various profiles, including commercial enterprises, schools, hospitals, gyms and swimming pools. In addition, in recent decades, this material has been successfully used in the construction of suburban buildings of a light type (greenhouses, greenhouses and conservatories).

Sheet mounting methods

Frame for polycarbonate

The main method of fastening monolithic polycarbonate products is the use of special thermal washers for its fixation.

We also note that the supporting frame on which polycarbonate sheets can be mounted are typical structures used for plain glass:

• frames with special grooves used as fastening areas for sheet material;
• arched structures involving the installation of polycarbonate sheets with a diametrical bend;
• holders of various types, providing fixation of sheets in a given position.

Regardless of the type of base used, there are two methods of mounting and fixing monolithic polycarbonate, conventionally called wet and dry.

Docking profiles

In accordance with the first of these methods, the fixation of the material on the frame is carried out using a special polymer putty applied around the perimeter of the frame structure, as well as on the edge of the sheet. After their articulation, the seams of the resulting joint are additionally sealed using a silicone filler. This installation option also allows the use of special profiled gaskets (or rubber strips).

Angle profile

With the so-called dry method of planting a sheet, mechanical fasteners are used, represented by profiles of one type or another and used in conjunction with rubber seals. In this case, fasteners with a threaded connection, as well as self-tapping screws or similar elements are used to fix sheet blanks. The dry method of fastening sheet blanks is more accurate due to the absence of liquid components.

With any of the methods of fastening we have considered, when laying sheets, thermal gaps should be provided to exclude the possibility of deformation of the material during its expansion.

Mounting order

Before starting to fix the sheets on the frame, it will be necessary to prepare (drill) holes in them according to the size of the fastener you have chosen.

fasteners

For vertical and horizontal fixing of monolithic polycarbonate sheets in greenhouses, on verandas and greenhouses, standard bolted joints equipped with rubber sealing washers can be used. In this case, the step of their fastening on the frame base should not exceed 500 mm.

Veranda roof

Marking and drilling of holes for fasteners is carried out immediately before their installation on a pre-prepared place.

The indent from the edge of the mounted sheet should be about 20 mm; moreover, its value should exceed the diameter of the hole by 2 – 3 mm.

Mounting scheme for cellular polycarbonate

To prepare holes in polycarbonate, standard wood drills can be used; at the same time, direct drilling of the hole should be carried out at low speeds of the tool used, which provide the ability to control the temperature of the working area.

Mounting

Proper fastening of sheets to the frame involves the formation of a well-fitted connection, ensuring their tight fit to the seat.

How to fix polycarbonate - various ways

This article has all the information about fasteners that are used to work with polycarbonate.

The technology of laying a polycarbonate coating has its own nuances and subtleties, for example, which side to put polycarbonate on the crate, and whether it is worth it to prepare the frame and crate of the greenhouse so meticulously. Each summer resident or just a future owner of a greenhouse, faced with the problem of how to properly fix polycarbonate on a greenhouse, tries to solve the problem at his own discretion and at the lowest cost, sometimes risking ruining everything and losing a lot of money. It is quite possible to save in the details of polycarbonate fasteners on a greenhouse, but this must be done wisely.

Features of fastening polycarbonate to the greenhouse

The quality of work performed depends on many factors. First of all, there are certain rules for fixing polycarbonate, not invented and not taken from the ceiling by the manufacturer of roofing plastic. Most companies carefully consider the mounting technology so as to ensure the maximum period of operation of polycarbonate in a greenhouse of any design. Moreover, manufacturers print textual reminders, drawings, diagrams and entire comics about the correct fastening of polycarbonate to a greenhouse on plastic packaging.

In addition to knowing, at least in general terms, instructions for fixing the coating, you need to take into account the features of mounting polycarbonate on greenhouse frames:

• The greenhouse structure must be leveled on a soil or brick base. The upper plank or conditional line connecting the arches at the highest point must be strictly horizontal, the profile strips or battens should be parallel to each other;
• Polycarbonate is attached to the crate of the greenhouse frame only with fixing the web mechanically, best of all with self-tapping screws, or for cast grades, you can fasten monolithic polycarbonate with clamping strips;
• The polycarbonate sheet must be laid on the support strips with the correct side. If mixed up, then the service life of the material will decrease by 2.5-3 times.

For your information! To facilitate the task, often the manufacturer of the plastic sheet puts special inscriptions and markings on the surface. Most often, the outer side of polycarbonate is sealed with paper or an opaque film.

Some manufacturing companies seal polycarbonate on both sides, and most often the front and back surfaces do not differ in color or design. Therefore, experienced craftsmen, before screwing the polycarbonate onto the greenhouse, prefer to decipher the designations on the packaging film, after which the outer side of the canvas is marked with a red line, the wrong side with a blue marker. At first glance, it’s a trifle, but according to the colored marks it is much easier to fix and control the polycarbonate on the crate.

The situation is much worse when the material was bought from hand, in used condition or without packaging. In this case, you need to involve a specialist or try to determine the external side by indirect signs. It does not make sense to start fastening cellular polycarbonate to the crate of the greenhouse without understanding the outer and wrong side of the canvas.

Which side to attach polycarbonate to the sun

Such strict restrictions in compliance with the rules for fastening polycarbonate plastic are associated with a high sensitivity of the material to ultraviolet radiation. The material laid upside down on the greenhouse will last a maximum of 3 years, instead of 15-17 years required for high-quality polycarbonate.

Therefore, during the production process, the outer side of the polycarbonate sheet is covered with a special transparent film that blocks 80-95% of ultraviolet radiation. High-quality cellular polycarbonate retains up to 99% of ultraviolet radiation, cheap varieties at best 70-80%, therefore, in order to hide the destruction of the material in the greenhouse, they are tinted in milky and smoky tones.

In standard cellular and monolithic polycarbonate, a thin transparent PVC film helps to protect the material. If the material to be fixed on the crate of the greenhouse is not sealed with packing viscose paper, then you can try to determine the outside by indirect signs:

• PVC film is tougher and harder than polycarbonate plastic, many craftsmen can determine its presence on the surface even by touch;
• Sometimes the outer side of the used ear polycarbonate is given out by scratches and marks from the attachment;
• The second method is simpler, you can measure the thickness of the walls of the honeycombs using a caliper, the outer surface will be 0.1 mm thicker than the wrong side.

Of course, this is not the most reliable way, but still better than putting expensive polycarbonate plastic on the greenhouse, trusting chance. Moreover, collapsing under the sun, polycarbonate often breaks the wooden parts of the frame.

How to screw polycarbonate

To fasten the honeycomb sheet, galvanized steel or black carpentry screws 19-50 mm long are used. The size and design of the self-tapping screw depends on three conditions:

• Thickness of cellular polycarbonate. Usually, a material no thicker than 10 mm is used for sheathing the greenhouse frame. If the greenhouse box is assembled according to the window principle from separate cells, then a more durable monolithic polycarbonate 10 mm is attached to the roof, and the sidewalls are covered with honeycomb plastic 6-8 mm thick;
• The selected polycarbonate mounting scheme. In the event that the canvas is laid with an overlap on a metal profile, a self-tapping screw 25 mm long will suffice; fasteners 19 mm long are used for fastening without overlap. To fix the polycarbonate on the wooden slats of the greenhouse sheathing, a fastener up to 50 mm long will be required;
• Washer dimensions. For standard mounting, silicone pads up to 5 mm thick are used, in decorative and home-made versions of pads, the size can vary from 3 to 15 mm.

For the main methods of fastening polycarbonate, a universal self-tapping screw with a hexagonal head and a drill at the end is used, photo.

Such fasteners are used for the aluminum frame of the greenhouse, but you can also mount on a tree, however, the strength of the connection will be halved. It costs a self-tapping screw assembly of 5-10 rubles, that is, for one greenhouse 2.1x6 m, you will need to spend about 500-600 rubles on polycarbonate fasteners.

For your information! On the other hand, a special self-tapping screw can be easily replaced with ordinary carpentry fasteners with a head for a Phillips screwdriver or bit. The speed of attaching polycarbonate to the frame of the greenhouse will be less, but you can save 200-300 rubles.

The only type of fastener that is not suitable for mounting polycarbonate is a self-tapping screw or a screw with an enlarged plastic washer - lining. Such lining options are used to fix decorative canopies, visors, gazebo roofs. For a greenhouse, the option is very inconvenient due to the presence of a protruding centering sleeve, in more detail on the video:

The easiest way is to fix the polycarbonate sheet with a detachable, snap-in profile. Instead of wrapping screws, it is enough to lay the plastic on a pre-assembled profile and snap the canvas with a patch strip.

Through what distance to fix polycarbonate

The step between the installation points of the self-tapping screws depends on the thickness of the material and the distance between the laths of the crate. Standard polycarbonate 8 mm thick and web dimensions 2.1x10 m is fixed in increments of 40-50 mm, for thicker sheets the step is increased to 70 mm, in any case, 1/3 of the distance between the carrier rails or greenhouse arches is considered the optimal length.

Often, on a wooden pitched roof of a greenhouse, thickened beams are used as a crate, on which sheets have to be laid not with an overlap, but with a thermal gap, and the resulting joint is closed with a sealant and a decorative frame. In this case, the fastening step of the self-tapping screws is increased by 20%, and the points for installing fasteners are staggered.

How to screw polycarbonate correctly

There are only two ways to fix plastic, fast and high-quality. It is clear that the correct fastening depends on experience and on how well the layout of the greenhouse is chosen. For example, the same polycarbonate mounting step on an arched greenhouse can be stupidly chosen 30-45 cm, following the recommendations and instructions. And it is possible in the lower part of the wall, where there is practically no normal load, to increase to 50 cm, and at the top of the greenhouse arch to reduce to 25 cm in length. As a result, you can not worry about rain and strong winds.

How to properly fix cellular polycarbonate

The easiest way to ensure quality is to follow the installation instructions for self-tapping screws. The scheme of work depends on the shape and size of the washer and the design of the self-tapping screw:

• An ordinary washer made of thin rubber holds polycarbonate mediocre, it is not difficult to install it, but when working with a screwdriver with a nozzle, you need to be very careful not to push through the honeycomb sheet on the greenhouse. The thickness of the gasket is small, and often beginners do not have time to slow down the screwdriver and pierce the surface of the polycarbonate;
• Reinforced pvc washer, usually transparent or tinted in the color of polycarbonate. The fastening process is not much different from the previous method, the risk of damaging the polycarbonate sheet already laid on the greenhouse is very large;
• Large silicone washer the easiest to mount. It is recommended to all beginners, it is quite difficult to push through the honeycombs, since the material is soft and easily deformed, preventing the screwdriver from screwing the fasteners deeper than the norm.

The most difficult is the fastening of a self-tapping screw with a head for a cross-shaped bit. If the hexagon socket more or less evenly holds and guides the self-tapping drill into the metal, then the Phillips bit under load overturns the fastener.

Advice! If for a number of reasons it was necessary to fasten with a cross-shaped self-tapping screw, then it is best to fix the polycarbonate in two steps. Previously, at the attachment point, drilling is performed with a thin drill for metal, after which you can easily install a bit - a cross and wrap the fasteners with a washer in the usual manner.

The most reliable way to attach the canvas to the greenhouse

In order not to get into trouble and not accidentally push through the polycarbonate already laid on the frame of the greenhouse, the process is divided into several stages:

• First of all, it is necessary to correctly lay the polycarbonate sheet on the greenhouse frame. The edge sheet is laid on the frame with a projection above the pediment of at least 5 cm, the second edge of the sheet must extend beyond the line of the support bar by 4 cm;
• At the joints above the crate, the panels of cellular polycarbonate must be overlapped. The sheet is leveled, stretched and fixed with a clamp, after which two self-tapping screws are wrapped on each side of the greenhouse;
• Straighten and stretch the canvas under the vertical fastening of the polycarbonate. Wrap fasteners on the walls of the greenhouse;
• The penultimate self-tapping screws are installed on the top of the arch or roof of the greenhouse.

Important! In all cases, the fasteners are not completely screwed into the details of the greenhouse crate with a screwdriver, a gap of 0.5-07 mm is left.

Upon completion of the polycarbonate lining of the greenhouse, you need to take a key or a socket head for a hexagon and tighten all attachment points manually. It is difficult, time-consuming and labor-intensive, but for a beginner, this is the only possible chance to secure the canvas and not accidentally push it through due to great diligence and lack of experience.

How to fix monolithic polycarbonate

Cast grades of polycarbonate plastic are rarely used for arranging greenhouses and greenhouses. Firstly, the monolith is more expensive, and secondly, there is no particular need to use absolutely transparent polycarbonate grades. An exception may be a greenhouse equipped with a heat accumulator, in which case polycarbonate on the roof is really able to improve the heating of plants in early spring.

There are two ways to fix monolithic plastic. The first involves sticking sheets on the wooden crate of the roof of the greenhouse. The glue is usually double-sided tape or a silicone cord laid in a groove in a wooden plank. This laying method is used only for flat roofs with a slope of no more than 10 o.

If the frame of the greenhouse is assembled from small cells, then you can glaze the frame with molded plastic using staples and a small amount of silicone. In this case, the monolith sheet is fixed in the corners of the frame using self-tapping screws, Z-shaped brackets lined with soft rubber. The edges along the perimeter of the sheet and the attachment points of the monolithic polycarbonate are sealed with ordinary sanitary silicone.

The second method involves fastening sheets with clamping pads. To fix the edge of the plastic, a wooden plank and several self-tapping screws are used. Before pressing the monolith, a thin silicone cord or tape is placed on the edges.

Is it possible to mount polycarbonate horizontally

In all known greenhouse designs, honeycomb material is attached only with a vertical orientation of the honeycomb. This is done for two reasons:

• To remove condensate;
• To prevent the appearance of a “bubble” on the greenhouse wall or plastic bulging outward.

The problem of condensate can be solved by "blind" sealing of the channels with a sealant, but this should be done only after the material has been fixed on the sheathing of the walls and roof of the greenhouse. The solvent evaporating from the silicone mass will serve as an additional antiseptic, which is why many cottage owners do just that - they muffle the ends of the polycarbonate, instead of sealing with tapes. No condensation, no algae, no bugs.

The second problem is much more complicated, cellular polycarbonate has different stiffness of the canvas, so the material is laid on the walls and roofs with vertical honeycombs. It is possible to build the walls of the greenhouse with a horizontal arrangement of channels, but in this case it will be necessary to release the self-tapping screws and reduce the pressing force to the minimum possible. In this case, the criterion for proper fastening is the mobility of the silicone washer, it should fit snugly against the polycarbonate, but it should be easy to rotate by hand.

Despite the fact that in theory such a mounting option is possible, only professionals working with polycarbonate laying can implement it in practice.

With all the advantages and merits, polycarbonate remains just a soft and pliable plastic, prone to aging and cracking. Honeycomb sheets, moreover, have the unpleasant property of accumulating plant microspores and dirt inside the channels. If the ends of the polycarbonate are not covered with tape during fastening to the greenhouse frame, then soon insects and moss may appear inside. You can fight green plaque with periodic cleaning with an antiseptic solution.

If the builders incorrectly laid the polycarbonate with the wrong side up, this is not a reason to dismantle the greenhouse. Instead, you can cover the surface with a protective PVC film used to restore the paintwork of cars.

Monolithic polycarbonate is considered more reliable in terms of greenhouse operation. But thermal stresses due to temperature changes can cause the smallest cracks, as a result, water drops with dirty stains appear on the ceiling and walls. Fixing the problem can be quite simple, it is necessary to treat the cracks with solvent 646 several times in order to melt the surface and eliminate the source of leakage in the greenhouse.

One of the problems that one has to face when fixing polycarbonate is related to the inconvenience of screwing self-tapping screws into a metal round pipe. In order for the fastener to properly enter the metal, the axis of the drill must be perpendicular to the metal surface. Only then can the honeycomb material be fixed without the risk of breaking through the thin surface. In this case, the L-shaped attachment to the electric drill helps a lot. With one hand we press the shelf against the steel pipe, with the other hand we drive the self-tapping screw with the washer into the polycarbonate. Marriage is almost non-existent.

If the polycarbonate sheet is planned to be fixed on the crate with ordinary carpentry fasteners, it would be right to do several training approaches on scraps in order to select the applied force on the screwdriver and the number of revolutions to fully enter the greenhouse frame material.

Conclusion

Learning how to correctly determine which side to lay polycarbonate is important for the durability of the greenhouse lining, but this is only half of the existing problems. It is important to learn how to properly install self-tapping screws and eliminate minor damage in the plastic cladding, which will always be present, even with the ideal installation of the material. Maintenance of a polycarbonate plastic greenhouse is not difficult, but it will still have to be done every year with the arrival of spring and the start of the season.