Sheathe under the roof. The technology of filing the roof eaves with corrugated board. Why overhangs are needed

The eaves, or cornice overhang, is the edge of the roof slope, extended beyond the side wall of the house. Cornice filing is the final stage of roofing installation, which is necessary not only to ensure roof ventilation and protection of the facade from precipitation, but also to give the roof and the entire structure an aesthetic, complete look. Since the cornice, in fact, is formed by rafters protruding beyond the facade, depending on the location of these rafters, it is customary to subdivide the cornices into frontal and side ones.

The frontal cornice overhang is designed to protect the facade of the building and represents the side edges of the roof slopes. For an ordinary gable roof, the device of the frontal eaves overhang consists in the release of the load-bearing beams outside the facade; often the frontal overhang is formed by batten boards, which are laid under the roofing material on the vapor barrier. A cornice board is attached to the crate, which is then sheathed with corrugated board.

Each sloping roof has a side eaves overhang and is formed by rafters that extend outside the house. In most buildings, the length of such a ledge is 60-70 cm, although sometimes you can see a narrower cornice. Failure to comply with the norms for the length of the eaves is fraught with additional measures to protect the wall from rain in strong winds, for example, by increasing the length of the rafters due to fillies (sections of a wooden board of a smaller section compared to a rafter board). The rafters that go beyond the facade are fastened with boards, which are subsequently covered with cladding.

More details about the device of the eaves are described in this video:

What is the cornice for?

The main task of any cornice overhang is to protect the building from moisture, for example, from water that flows down the roof when it rains or snow melts. Thanks to the cornices, all the water that falls on the roof of the house flows down its slopes and is directed to the gutter or to the blind area of the building. It is logical that the farther the water is diverted from the wall of the house, the less it will get wet, even in the event of a strong wind.

Protecting the roof from atmospheric influences, at the same time, the eaves should not interfere with the natural ventilation of the under-roof space, which is important both for residential attic floors and for cold roofs. The warm air rising from the ground must pass freely through the eaves and, moving between the vapor barrier and the roofing material, exit through the roof ridge. Thus, during the installation and filing of the cornice, it is strictly forbidden to use all kinds of sealants and mounting foams, which contribute to the formation of condensate and thereby lead to wetting of the roofing insulation.

Calculation of the length and width of the eaves

The reliability of protecting the walls of the house from precipitation and moisture depends on how correctly the length and width of the cornice were calculated - in the case of side and front overhangs, respectively. For side eaves overhangs, in most cases, 50-60 cm is enough, while for frontal overhangs, the width of the cornice may well be increased to 1 meter. In the case of a house roof made of corrugated board, the following rule applies: the greater the height of the sheet profile, the longer it is necessary to make the cornice overhang - this is necessary so that moisture does not get under the roofing material.

Fasteners for cornice

To sheath the eaves with a metal profile, you will need three types of fasteners:

Wood screws 100 mm long
Rivets 12x4
Galvanized screws 50 mm long

The maximum distance between galvanized screws for fastening corrugated board to a wooden base is 40 cm. Based on this and knowing the length of the side of the house, it is easy to calculate the required amount of fasteners for filing corrugated board to the side cornice overhang. The number of wood screws for fastening the base is calculated based on the number of rafters - three screws per rafter.

Required Tools

To file the roof eaves with corrugated board, you will need the following tools:

Building level for leveling the wooden base for fastening the corrugated board
Screwdriver - the main tool for attaching the base board to the rafters and attaching the corrugated board to the base
Metal shears for profile cutting
Riveter for fastening plastic additional profiles to corrugated board

Installation of a roof cornice: instructions

The first stage of sheathing the cornice with a profiled sheet is the preparation of the base for attaching the metal profile. As such a base, a board with a section of 100x30 mm is used, which is attached to the bottom of the rafter beams along the wall and leveled with a level and a stretched cord. If in some places the board adjoins the rafter unevenly, the surface of the beam can be slightly trimmed with a chisel, and if, on the contrary, there are gaps between the board and the beam, they can be filled with scraps of plywood or a thin plank. After making sure that the base board fits evenly, they proceed to its rigid fastening with the help of wood screws and a screwdriver.

If the angle of inclination of the roof of the house is large, the corrugated board can only be fixed in a horizontal plane, and then it will come into contact with the roof slope. However, a more reliable design option is sheathing the eaves with corrugated board in two planes: horizontal and vertical. Thus, in addition to the horizontal base board, it is necessary to fix another vertical board perpendicular to it using the same screws.

After mounting the two base boards, you can proceed to the direct sheathing of these bases with corrugated board. But before that, in order to protect the edges of the profiled sheet pre-cut into strips from corrosion, it is necessary to attach a plastic end profile of the L (L-ku) shape to it. This happens as follows: the L-ka is put on the edge of the corrugated board strip, then holes with a diameter of 4 mm are drilled in it and the profile, and the L-ka is attached to the profile with rivets. In order for the plastic final profile to lie exactly on all strips of the profiled sheet, the profiles must be joined before attaching it to each next workpiece.

The sheathing of the eaves with corrugated board starts from the side (vertical) side. To do this, holes for fasteners are pre-drilled in the corrugated board, and then the profiled sheet is fixed to the board with galvanized screws (the use of galvanized fasteners is preferable because of its resistance to corrosion). It is important that all sheet attachment points are located in the “hollow” of the profile, and it is better if every second “hollow” is subjected to fastening.

Having finished with the sheathing of the vertical board of the eaves, proceed to the installation of the horizontal part of the sheathing. The vertical and horizontal strips of the profiled sheet are interconnected with a decorative metal corner, and before fixing the corner, small pieces of wood or plywood are placed under the waves of the vertical strip of the metal profile every 60-80 cm to ensure future fastening of the brackets for the drain gutter. Like L, the corner is riveted into pre-drilled holes in the side and bottom profiles.

If it is necessary to join the cornices at the corners of the building, the lower metal profile is cut at an angle of 45 degrees, and the joint line is closed with a plastic connecting additional element (H-coy). The ends of the cornices are also closed with a piece of metal profile.

The process of filing a metal profile onto a cornice is shown in the following video:

When the installation of the roofing is completed, work begins on the sheathing of the roof overhang. This is done not only to protect the facade and ensure ventilation of the roof, but also to give a finished appearance to the building. The article will talk about what materials are used for these purposes and how the roof eaves are hemmed with soffit, corrugated board and wooden clapboard.

Roof eaves device

The eaves overhang is the protrusion of the rafters outside the facade of the house. It can be both simple and with removal. The first one is simpler in execution, and with a strong wind it will not be unpleasant to buzz in it, which cannot be said about the second option.

Roof overhang assembly

1- Gutter;

2- drip;

3- metal apron on the frontal board;

4- self-tapping screw;

6- bar 5x5 cm;

7- rafter leg (filly);

8- hemming material;

9- break;

10 - boards that are the basis of the cornice overhang;

11 - support bar for fixing breaks.

There are two types of cornice overhang - side and front.

Frontal roof eaves

Front is needed to protect the facade of the house. It represents the lateral edges of the sloping roof slopes. Accordingly, they are absent from the hip (four-pitched) roof.

The device of the front overhang of an ordinary gable roof is carried out by releasing the bearing beams fixed on the rafters. It is often possible to meet when the frontal cornice is formed by sheathing boards, which are laid on a vapor barrier under the roofing material. A cornice board is attached to them, which will later be sheathed with corrugated board or soffit.

Side roof eaves

All sloping roofs have a side overhang. It is formed by rafters that protrude beyond the walls of the house. The distance of their protrusion is calculated from the height of the house and the width of the blind area, often it is about 50-70 cm.

Although it is believed that the minimum allowable overhang size is 50 cm, there are also narrower ones.

In this case, the wall of the house must necessarily have good wind protection, since it will get very wet under slanting rain.
The second option to correct the situation is to install fillies, thereby increasing the length of the rafters. But this is a rather laborious process, and with the roof already made, few people want to open everything and redo it again. Therefore, it is important to provide for the required size of the roof overhang even at the construction stage.

The rafters are interconnected by boards along the entire length of the eaves. In the future, they will be covered with facing material.

Creation of proper ventilation of the roof through the cornices

The main function of any eaves is to protect the roof from atmospheric influences. But at the same time, it should not interfere with the natural ventilation of the under-roof space. This is important not only for residential attic floors, but also for cold roofs. The warmer air rising from the ground must pass through the eaves unhindered and, moving between the vapor barrier and roofing material, go out through the ridge. It is for this reason that it is forbidden to use various sealants and mounting foams when filing the eaves. Otherwise, condensation will form, which will lead to the wetting of the roofing insulation.

But there are exceptions here - eaves are made ventilated only under the slopes of the roof, and all frontal overhangs are closed “tightly”.

The choice of materials for filing roof overhangs

To date, there is a wide range of materials for filing the roofing cornice. Of course, each of them has its own advantages and disadvantages, but all of them fully protect it from moisture, provide insulation and ventilation of the roof. When making a choice in favor of a particular material, one should be guided not only by its beautiful appearance, but also by the length of its service life.

Decking

It is galvanized steel with a multi-colored polymer coating. It is resistant to mechanical damage and temperature extremes, has the necessary rigidity, and is also not afraid of wind loads. To provide the necessary ventilation, a gap is made between the corrugated board and the wall of the house equal to the height of its wave.

Soffits

This is the most popular material specially designed for filing cornices. In fact, these are plastic panels that look like siding, but already have ventilation holes. They also differ from ordinary siding in that they contain UV stabilizers that protect the spotlights from the negative effects of sunlight.

Copper spotlights

This is a durable material, outwardly very aesthetic and presentable, but also quite expensive. Soffits made of copper have high fire-resistant and strength characteristics.

Aluminum spotlights

They are very light, fire-resistant, elastic, and if necessary, their repair is not difficult. They also have high color fastness, so that the color saturation does not change under the influence of ultraviolet radiation.

The only drawback is the scarcity of colors - they are produced in white or brown.

Galvanized spotlights

They are durable and do not require additional care. These are durable spotlights that are not afraid of moisture and fire. But they are quite heavy, which to some extent makes their installation more laborious.

Vinyl spotlights

This is an inexpensive and most popular soffit option for filing roofing cornices. They are light in weight, perfectly protect against environmental influences, have a noble appearance, are easy to install, and also create a seamless canvas, providing full ventilation of the under-roof space.

Today they are made of fire-resistant plastic, which, moreover, is able to withstand severe loads. Three types are produced:

solid three-lane without ventilated holes;
fully perforated;
three-strip with a perforated center strip (the most popular).

Regardless of the material chosen for the spotlights, they are all fairly easy to install, and such work will not be difficult even for a beginner in construction. The basic rule when installing them is that they are located perpendicular to the wall, and not along.

Wooden lining and edged board

Until now, it is often possible to find that real wood is chosen for filing the cornice overhang. Since it is installed outside the house and is exposed to aggressive environmental influences, the choice of material must be approached responsibly. You can’t save and buy a lining that is too thin, its optimal thickness is 2 cm. It should also be of medium humidity (too wet will not work, as it can “lead”, but very dry is also not the best option).

To ensure ventilation, the boards are nailed with a 2 cm indent from the wall.

Sheathing of the roof overhang on the rafters

This method is rational for roofs with a small angle of inclination. The complexity of this execution of the sheathing lies in the fact that all the edges of the rafters form a flat plane.

But this can be achieved forever, then the way out will be small boards that are attached to the rafters. Their length is equal to the distance from the wall of the house to the edge of the overhang. To install them evenly, first one board is screwed from each edge of the eaves and twine is pulled between them. According to the received landmark, all other segments of the boards are attached. Sheathing to such a frame is attached to metal corners or screws.

Roof overhang filing on a wooden box

This method is ideal for roofs with a large slope. To equip such a box, a 4 cm thick edged board is taken and fastened between the wall of the house and the edge of the rafters. If one of its edges is installed directly to the rafter leg, then to fix the second edge, you will need to install a board adjacent to the wall, which is screwed to the rafters from above.

A second option is also possible, when instead of an additional vertical board, a beam is attached to the wall of the house with dowels.

On this, the frame of the box is completed, and the skin can be attached to it. To ensure the necessary rigidity of the entire structure, everything should be fixed not on nails, but on screws or corners.

Hemming of cornice overhangs with spotlights

Stages of work:

Soffits are completed with two special strips, which have the shape of the letter J or F. One of them is attached to a wooden rail prepared on the wall of the house, and the second from the side of the overhang. Self-tapping screws are used as fasteners. All planks must be attached absolutely evenly in relation to each other, so it is recommended that you first make a markup.
Then the width of the eaves overhang is measured and 6 mm is subtracted from the result. This is done in order to create the necessary gap, which compensates for the thermal expansion of the material. Soffits are cut into strips of the desired length.
The prepared plates are slightly bent and inserted into the grooves of the installed profiles. Where are they fixed with screws.

In order to hem the corner of the eaves, the length of the soffit strips must be gradually reduced, cutting off one of the sides at an angle of 45 degrees.

For their connection, an H-profile or two J-profiles are used.

For more detailed instructions on how to hem a roof eaves with spotlights, see the video below.

Important points in working with spotlights

The soffit is attached only at a right angle and through special holes;
there must be a gap so that the panel can expand or contract unhindered;
optimal size of fasteners: leg length 3 mm, cap width 8 mm. They should not be screwed tightly, but have a gap between the cap and the surface of the soffit equal to 1 mm;
the distance between the attachment points is 40 cm (more often);
soffits are cut using a circular saw with a blade on which the teeth are located in the opposite direction. You can also use scissors for metal or a knife. In the latter case, it is best to draw the place of the incision with it, and bending the panel along it, break off the required segment;
it is necessary to store and transport spotlights on a flat surface in low piles (packs of 10-15);
despite the fact that the manufacturer assures the possibility of installing spotlights even in winter, it is not recommended to carry out work if the temperature is below 15 degrees.

Sheathing of roof eaves with corrugated board

First, a bar is nailed to the wall in a horizontal position at the level of the edge of the overhang. At the same level with it, a second bar is attached along the edge of the rafter legs;
the corrugated board is cut to the required length (not forgetting the thermal reserve of the material and the need for a ventilation gap) and attached to the installed bars with self-tapping screws;
the junction of the profiled sheet and the wall is closed with an inner corner bar, and the connection of the outer edge with the rafters is decorated with a similar outer corner bar.

This completes the installation of corrugated board.

Roof overhang filing with wooden clapboard or board

It is most convenient to file roof overhangs from below, standing on scaffolding or on a stepladder.

Important! The eaves should be hemmed only after the walls of the house are completely insulated from the outside, a vapor barrier is made and the installation of the facing material is completed.

Before sheathing the overhangs with clapboard, all rafters on the side cornices must not only be of the same length, but also be exactly parallel to the wall of the house. Strapping wind boards are attached to them.

When all this is done, the installation of the skin fastening begins.

First, one board is screwed to the wall vertically, its lower edge should be at the level of the edge of the rafters - in the figure above (1).
The second board is attached between the rafters and board number 1 along their bottom edges (2). It should be parallel to the ground. Thus, the basis on which the crate will be installed is obtained.
When the frame is prepared, the installation of the skin itself begins.
- When sheathing the roofing cornice with boards, a small gap must be left between them and the wall. The boards themselves are selected even, of good quality and 1-2 cm thick.
- To ensure the necessary ventilation of the under-roof space when sheathing with wooden clapboard, it is recommended to install ventilation grilles around the entire perimeter in increments of 1.5 meters.

But often, relying on the properties of wood to "breathe", most builders do not adhere to these rules.

Roofing and wall cladding work usually ends with the filing of overhangs. This procedure gives the building a finished and neat appearance. A house with an unlined overhang gives the impression that it is still under construction. In this article, we will dwell on the issue of filing an overhang with the help of spotlights.

Do the overhangs need to be hemmed?

Some homeowners try to save money on almost any construction work, so they often neglect the elements that are optional in the design. Especially for such readers, we will immediately say that filing the overhang with spotlights is advisable not only from a decorative point of view.

The overhang is the part of the roof that protrudes from the wall for a certain distance. Thus, this element provides protection for the foundation and walls from precipitation. At the same time, the overhang itself does not have such strength as the rest of the roof, which rests on the wall. Without filing, a strong wind will blow directly into the roofing "pie" and the coating will take on all the load. Along with the wind, water can also enter, which definitely will not favorably affect the life of the insulation. Installing spotlights will create an airtight barrier in the way of water and wind.

An unsewn overhang is a vulnerable spot of the roof.

Another reason to hem the overhang is small animals that simply love to settle in cozy nooks and crannies at home. Such living creatures include not only birds, but also much less pleasant "neighbors", for example, mice.

What else is hemmed with overhang?

The article is devoted specifically to sheathing with vinyl spotlights, but it is worth saying a few words about the materials that can also be used for this type of work.

Boards- the most budgetary version of the lining material. Planed or edged boards are used. When mounting on a cornice, ventilation gaps must be left. Negative features are deformations under the influence of changes in humidity, in addition, wood is prone to mold and decay, so it must first be treated with antiseptic agents.

Overhang filing with boards.

clapboard- profiled sheathing board, there is no need to make gaps at such a board: special grilles are installed for ventilation.

Some types of coatings require the installation of ventilation
gratings for air circulation inside the roofing "pie"

Wood material for acclimatization should lie outside for a month under a canopy to minimize shrinkage and expansion.

Decking- profiled metal sheets, can also be used for filing the overhang. They are easy to install, as they immediately cover a large area. At the same time, the material has a sufficiently large weight, which loads the structure, and requires additional ventilation.

Decking is a material that is easy to install, but heavy.

wood boards- in most cases, moisture-resistant plywood and OSB are used for filing. The material is practical and can be attached immediately in large pieces. At the same time, the disadvantage is not a very attractive appearance, therefore, to give the overhang a neat appearance, it will need painting.
PVC panels (vinyl)- the material is not afraid of frost, ultraviolet and moisture. Maintains an attractive appearance for a long time. Such panels are usually called vinyl. They are produced by co-extrusion and have a two-layer structure. Soffits are made from PVC for filing an overhang or siding panels, which are also used for these tasks.

Types of overhangs

In the design of the roof, two types of overhangs are distinguished: frontal and eaves.

Frontal- part of a gable roof, which is located on the front side of the house. The front overhang has a slope corresponding to the slope of the entire roof. This place takes on serious wind loads, air currents can drive water into the roof. To prevent this from happening in these places, the roof is hemmed with sealed elements.

Eaves overhang located on the side of the roof, has a horizontal arrangement. This overhang is important from the point of view of ventilation of the roofing "pie". The air from the bottom of the overhang must pass through the ventilation gap and exit through the outlet of the KTV (ridge point valve) or ridge. Air circulation ensures the removal of condensate, respectively, the insulation does not get wet and does not lose its thermal insulation properties. For this reason, the filing of the cornice overhang requires the installation of soffits with ventilation holes.

Scheme of ventilation of the cornice overhang through a perforated soffit.

Soffits or siding?

Often, siding is used instead of soffits for filing overhangs, let's try to figure out how these coatings differ from each other.

Soffits are a special additional element, which is designed for filing an overhang. The part can be made of different materials (steel, PVC, aluminum), the choice usually depends on the siding material used to sheathe the walls of the house. Usually the useful area of the soffit is larger than that of ordinary siding. Soffits are perforated and solid. The former are used for filing cornice overhangs, where ventilation is required, solid - for frontal ones.

Perforated soffit has holes for
air penetration into the roofing "pie".

You can read about other additional elements for siding in the article “Additional elements for installing siding”.

Siding- panels used for cladding the walls of buildings. They are not designed specifically for filing overhangs, but due to their lower price they are often used for this purpose. True, such savings are not always advisable, since when filing cornice overhangs, you have to additionally purchase ventilation grilles and cut holes in the siding for them. It is not recommended to leave openings without gratings, as debris will fall into them, as well as birds and insects. Ventilation is not done on the front overhangs, so in these places the use of siding panels is more justified, but it will still require adjustment in size.

An ordinary siding panel does not have holes, therefore, for installation
it on the cornice overhang, additional holes will be required.

Soffit calculation

The length of the soffits usually exceeds the width of the overhang (the elements are attached from the wall to the edge of the overhang so that the mounting holes fall on the roof sheathing), so the planks will need to be cut to a specific size. To correctly calculate the total need, it is necessary to measure the area of \u200b\u200bthe overhang. When cutting soffits, consider auxiliary elements and a gap of 1-2 mm.

Moldings, J-bevels or two J-profiles can be used as auxiliary fasteners. The calculation of these elements is made by measuring the perimeter of the roof. When filing cornices, the number of perforated planks is calculated separately, the standard ratio is 1 to 2. The total area of the ventilation holes on the spotlights should be equal to 1/150 of the ventilated volume, taking into account the existing ventilation holes.

Mounting options for spotlights with various additional elements.

Installation instructions

Soffits are mounted in two ways: horizontally and along the rafters.

Mounting to rafters- with this method, the spotlights are in an inclined plane, the crate is fixed on the rafter legs, then the filing itself is attached to it. This installation method is used only on roofs with a slight slope.

Sheathing on rafters is made on
roofs with a slight slope, not more than 45 degrees.

Horizontal mounting- under the overhang, a box is formed from timber and boards, which has a plane parallel to the ground. This method is preferable with a roof slope of more than 45 degrees.

Installation of spotlights on a horizontal box under the slope.

Preparation for the installation of spotlights includes cutting off all protruding truss elements. The rafters should protrude the same distance from the wall. Then, the strapping and frontal boards are nailed from the cornice overhang. From the front side - end board. Consider step-by-step instructions for attaching spotlights using two J-profiles.

Another way of plating using a J-bevel that overlaps the frontal board,
when using two J-profiles, the frontal board is covered with another soffit.

J-profile is cut to the length of the slope. For cutting, it is more convenient to use a grinder, but a regular hacksaw is also suitable, only the process will take longer.

J-profiles are fixed against the wall and on the edge of the cornice with self-tapping screws.

Soffits, which are pre-cut to the desired size (taking into account the profiles and a gap of 6 mm), are installed in the profiles, first the edge against the wall is inserted into the groove.
The soffits are screwed onto the screws to the crate. Vinyl tends to expand under the influence of temperatures, so the self-tapping screw must be tightened, leaving a distance of 1 mm from the cap to the soffit. Subsequent soffits are joined using locking elements.
When mounting with two J-profiles, another row of spotlights is fixed on the frontal board.

Docking spotlights with the help of locking elements.

Conclusion

The filing of overhangs is necessary to protect the roofing "pie" from moisture. Soffits allow you to quickly mount a coating that goes well with a facade finished with siding. This additional element provides the necessary ventilation of the roof space.

Building yard

Soffits for filing the cornice overhang: features and installation

After the completion of the construction of the roof structure and the installation of the coating, the time comes for filing the roof overhangs, which are sometimes simply called the box. The appearance of the entire building depends on the method of filing and the choice of material. The box under the roof is the final touch, giving a finished look to the entire structure.

The design of the box also includes elements of the ventilation system of the under-roof space. Don't forget to fix the gutters.

For filing overhangs, you can use a variety of materials and a variety of designs.

What is a roof overhang?

An overhang is a structure protruding for a certain length beyond the lines of the bearing walls of the building, the main function of which is to protect the building, its supporting structures from snow, rain, melt water flowing down the roof.

The length of the overhangs is on average 500 - 600 cm, but if desired, it can be increased.

Usually overhangs are arranged at the expense of the rafter system, but sometimes it is not possible to create such ledges as a continuation of the rafters. In such cases, the so-called forced continuation of the rafter structure is used. The elements forming the elongated rafters are called "fillies".

Since the pediment of the building is also an unprotected part of the house or roof, it also needs to be protected from the damaging effects of rain and snow. The width of the front overhangs should be 500 mm or more, and such a design is arranged using a cornice-type board.

From below, the overhangs must be sheathed to extend the service life and improve the exterior of the building.

What technologies are used and what to focus on when filing overhangs?

The filing should be started when the work on the installation of the rafters is fully completed and it is necessary to proceed to the flooring of the crate along the border of the roof covering.

When sheathing overhangs, several important points must be considered.

Before starting work, it is necessary to saw off the ends of the rafters exactly in one line. The parallelism of this line with respect to the adjoining wall of the building must certainly be observed.

In most cases, sheathing is done with boards. Its external attractiveness depends on the observance of equal width in different parts of the wall.

The ends of the rafters are sawn off vertically, while the end part is sewn up in the same way as the entire filing.

After the sawing of the rafters is completed, the first board of the crate is stuffed along it along one even line. In the future, it serves as a guideline for the rest of the work.

One important point must be taken into account: it is possible to start external insulation only after the process of filing the roof overhangs is completed.

If the insulation is done before the installation of the sheathing, for a high-quality insulation device, the boards will have to be torn off.

The choice of material for sheathing overhangs

There are a lot of materials that are designed for filing roof overhangs. Despite the diversity, they are subject to the same requirements.

The material for filing should provide reliable protection of the eaves of the roof from any precipitation, its insulation, as well as good ventilation of the under-roof space. High-quality hemming material retains its original characteristics for a long time.

The most commonly used materials for filing overhangs

Decking

It is a galvanized steel sheet coated with a polymer layer. The polymer is applied mainly for additional protection of galvanized steel, but also has an indirect function - it provides a variety of colors.

Thanks to galvanized steel, a high level of rigidity of the sheets and the stability of their geometric parameters in relation to thermal and mechanical loads are achieved. The first is the effect of high temperatures, and the second is the pressure of the wind.

When choosing corrugated board for filing overhangs, ventilation is ensured due to the presence of a gap created by the height of the wave. Panels from corrugated board can be made of the required width, which significantly reduces the time required for their installation, as well as financial costs for filing.

Soffits

These are plastic-based panels that are produced specifically for filing roof overhangs. Soffit is very easy to use and therefore very popular. In many ways, it is similar to siding, but it also has some differences.

Firstly, the thickness of the soffit plastic is much larger; secondly, the material has a special perforation, the purpose of which is the ventilation of the under-roof space. Thirdly, the soffit plastic contains special UV stabilizers, which significantly increase its resistance to ultraviolet radiation.

Soffits are very light, so they are easy to transport. To carry out the installation of spotlights, you do not need special equipment, which allows you to cope with the work yourself, without the help of professional builders.

Since soffits are resistant to adverse weather conditions and sudden temperature fluctuations, you can work with them at any time of the year and under any weather conditions.

A wide selection of colors allows for the most original design solutions.

Soffit panels are cut along the length of the overhangs. Their installation is not carried out along the wall, but perpendicular to it.

Plain wooden lining

Since, when used as a binder, the material is used outdoors and is exposed to adverse environmental factors, when choosing it, one should be especially careful about the quality of the wood.

Attention should be paid to such qualities as the thickness of the product (it should not be too thin), the degree of humidity (the lining should not be too dry or excessively wet).

Finished lining planks are stacked very tightly to each other. In order to ensure ventilation, it is necessary to insert ventilation grilles into the structure every 1.5 meters.

Planed edged board is the most cost-effective option. Its thickness should be from 17 to 22 mm, the width is selected individually and can vary from 50 to 250 mm.

The wood of coniferous trees is used: spruce, pine, larch. Prior to installation, the boards must be impregnated with antiseptic and waterproof (impregnation, paint, varnish) compounds.

As in the case of using lining, the humidity of the boards must correspond to the natural humidity of the environment. When using too dry or wet wood, it will deform over time.

Overhang filing boards are placed parallel to the wall or perpendicular to it. As a rule, a gap of 10-15 mm is maintained between them, so that air masses can freely penetrate into the under-roof space and ensure its uniform ventilation.

With a perpendicular arrangement, the plank filing is attached on both sides, with a parallel arrangement, every meter. If the overhang is wide, then the fastening is done in the middle.

PVC siding

One of the most economical and technologically advanced materials for filing. Moisture-resistant material is used for overhangs. The kit includes strips intended for sheathing edges (in the shape of the letter "P"), corners for fastening strips and joints, ventilation grilles.

The filing is located perpendicular to the wall, since it is much more convenient and economical, given the fact that the siding does not have a sufficient degree of rigidity and may often need to be fixed. Cut planks of the desired length in 2-4 places are attached to a wooden frame. The number of attachment points depends on the width of the overhangs.

Sheet metal

Steel with a polymer coating, galvanized, copper, aluminum allows you to quickly complete the sheathing. The thickness of the metal sheet should be 0.6-0.8 mm.

The length of the sheets can reach 6 m, and their width must correspond to the dimensions of the overhang.

Ventilation holes are cut into the sheets or perforated sections are inserted during installation.

If the sheets are steel, then the trimming points must be treated with an anti-corrosion agent or coated with paint. Aluminum and copper do not need to be processed.

When working with metal filing, it is necessary to have special equipment for cutting the material.

wood boards

The advantage of this material is that it is easy to cut. Plates are produced in a water-resistant version. Their installation is carried out in large planes by attaching them to wooden beams with screws.

When using wood-based panels, it will be necessary to cut ventilation holes with gratings into them and cover them with paint to give the overhangs an attractive look. The rigidity of the boards is quite high. For OSB, 6.3 mm will be enough. The material is attached to a wooden frame every 1-1.2 m.

Some features of the installation of the binder and the frame for it

As already mentioned, after the installation of the roof structure, it is necessary to proceed to the sheathing of the overhangs. There are two main stitching methods.

With the first method, it is carried out directly along the rafters. This option is suitable for roofs with a slight slope or when there is a need to increase the height of the building.

With this method, the lower part of the rafters is located in a single plane. If this condition is not met, then you can achieve a flat plane using additional boards: they should be overlapped on the rafters.

Then you need to set and screw the first and last strips of material for sheathing, then tighten the threads to keep the level, and attach the remaining strips.

When roofing boards converge on both sides, rafter boards are installed on both sides. The usual length of overhangs is 600 mm.

The second way is more popular. All rafters should be cut horizontally and vertically. A board is fixed at the bottom of the rafters, while a beam is attached to the wall. It is located 1 cm above the frontal board in order to make it possible for moisture to drain.

With an overhang width of more than 450 mm, an additional board should be installed in the middle. When the roof slopes converge in one place, the board must be nailed from the corner of the roof to the corner of the building.

Regardless of the sheathing method, the roof overhang box is installed in the same way: a board is stuffed along the length of the wall along the gable onto the crate, from which the distance corresponding to the length of the overhangs is measured, after which a board is nailed parallel to the gable wall.

It turns out a rigid structure independent of the wall. Care must be taken to ensure that all fasteners are reliable - on screws, and preferably on metal plates and corners.

After completing the installation of the frame, it is necessary to proceed with the sheathing.

Sheathing clapboard or board

Since wind, rain, snow, cold air, etc. will enter this place, the fastenings of the overhang sheathing must be very reliable.

Screw fixing is the best choice.

You must use at least two screws at each attachment point.

Along the length, the boards are joined in a checkerboard pattern in order to prevent the location of two joints side by side. The exception is corners where sawing is done at an angle of 45 degrees (in some cases - at a different angle).

A board or lining is treated on both sides with an antiseptic. The composition is applied twice: the first time - even before installation (in this case, both surfaces and ends are processed), and the second - after installation. In this case, it is necessary to cover with the composition all fasteners, cutting points, etc.

At the end of the work it is necessary to install ventilation grilles. When using lining, they are cut into a box. It is better to do this in advance.

How to install a sheet of corrugated board?

The filing of overhangs from this material is carried out in the following sequence:

Sheets of corrugated board are screwed along the cornice and wall to the frame, using self-tapping screws;

At the junction points of the wall and the material, a frontal bar is mounted, as well as an inner corner. The frontal bar is screwed to the frontal board, and the inner corner - to the corrugated board;

The outer corner is fastened at the points of the outer joints of the profiled sheets;

Profiled sheets are screwed along the gable along the outer edge of the overhangs and along the wall;

After that, the corners and the end plate are fastened;

To facilitate the installation process and provide ventilation, the width of the profiled sheets should be 2 cm less than the width of the overhangs.

Hemming overhangs with spotlights

One of the obvious advantages of spotlights is the ease of installation. Even beginners can do it.

Finishing overhangs with spotlights consists of the following steps:

the details of the filing are cut in such a way that they correspond in length to the width of the overhangs;

wooden planks are attached to the roof overhangs;

an F- or J-profile is screwed to the bottom of the bar, which should act as a groove;

one edge of the soffit panel is inserted into the groove, and the other is screwed to the rafter;

the side screwed to the rafter is closed with an L-profile (front plate).

CONCLUSIONS

The main purpose of overhangs is to protect the building from atmospheric precipitation and melt water.
Sheathing of overhangs is the final stage of roof installation.
Sheathing overhangs can be done in two ways.
Materials for filing should provide protection from precipitation, insulation, ventilation of the under-roof space.
The most common materials for sheathing are corrugated board, siding, spotlights, wooden lining, edged planed boards, metal sheets, wood boards.
The installation of each of the cladding materials has its own characteristics.

Video instruction on how to properly decorate the roof overhang with spotlights

The service life of the erected roof is positively affected by filing the eaves with corrugated board. This process is simple, but it will protect the under-roof space from the penetration of rodents and birds.

The roof is the most complex part of a house being built, since it consists of a large number of elements that are closely interconnected with each other. Some novice craftsmen, due to insufficient experience, believe that after the installation of the coating, the roofing is completed.

In fact, such work as the installation of a gutter system and the filing of roof eaves with a metal profile or other materials is of no small importance for its proper functioning.

Features of the cornice device

When developing a roof project, it is always provided that it protrudes beyond the outline of the perimeter of the building. The roof overhang is the gap between the lower edge of the slope and the walls of the house. According to building codes and regulations, it should be equal to at least 40-50 centimeters.

Roof overhangs serve to divert rain and melt water that rolls off the roof surface to the maximum possible distance from the walls and thereby protect them from getting wet.

There are two types of overhangs:

eaves - it is formed between the lower edge of the slope and the side wall of the building;
gable - is the removal of the roof beyond the gables of the building, it is equipped using a crate or truss structure.

By the way, cornices are built by lengthening the legs of the rafters or mounting the filly - this is the name given to the bars used to lengthen the rafters so that the overhang becomes wider. Since the load on the roof outside the perimeter of the building is small, boards of a smaller section are used for their manufacture. The fillies are fixed on the rafters with metal strips or nails.

Why do we need overhangs and how to sheathe them

After the installation of the roofing is completed, they begin to file the eaves with a profiled sheet, clapboard, siding, etc.

Overhangs are assigned decorative and functional tasks, including:

Removal from the surface of the walls of water flowing from the roof. Without a wide cornice, the decoration of the building begins to lose its appearance in a short time, cracks and dampens.
The removal of moisture from precipitation outside the foundation of the house and the blind area.
Protection of the elements of the truss system from getting wet. The fact is that filing the roof with corrugated board, other materials or soffits will protect the wooden truss frame from moisture from below and, as a result, from decay.
Creating a complete appearance of the building, since the decorated cornice hides the unpresentable elements of the roof.

In order for the roof to look harmonious and proportional, it must be borne in mind that the smaller the slope of the roof, the wider the cornices need to be made. The width of the overhang also depends on the climate of the region. In areas where there is a lot of precipitation and snowy winters, it is better to make the cornices wider.

Methods for finishing roof eaves with a metal profile

In case of strong wind or oblique rain, water can flow under the roof, so experts do not recommend leaving the eaves without sheathing - profiled sheet is considered one of the best solutions for facing overhangs. You can also use perforated panels (soffits) for this.

There are several options for how to sheathe a roof eaves with corrugated board:

Diagonal way. The profiled sheet is attached to the lower edge of the filly or legs of the rafters with starting strips or self-tapping screws. Such filing of roof overhangs is the simplest, but more material will be required for implementation. This technology is used for filing the roof with a profiled sheet, if it has a large slope, but a small length of overhangs.
Horizontal way. The essence of this technology is the use of a box, which is later sheathed with corrugated board. Work begins with fastening to the wall of the bar and installing a wooden frame. This method is quite difficult to implement, but the wall decoration will be better protected from water.

The use of a metal profile for filing a cornice has the following advantages:

profiled steel sheet with a polymer coating is resistant to corrosion processes;
the material is characterized by increased mechanical strength;
you can easily choose the color scheme of the skin to create a unified architectural look.

Execution of filing with corrugated board

In the process of arranging homeownership, it is necessary to file the roof with a metal profile or other material. It is performed after the completion of the laying of the coating on the roof along with the installation of the gutter structure.

In the process of finishing roof overhangs, corrugated board trimmings, wood blocks, fastener strips, galvanized self-tapping screws are used.

The work is carried out in stages:

The ends of the fillies or legs of the rafters are trimmed in length. The ends of the bars should be parallel to the surface of the walls.
A frontal board is attached to the ends of the bottom of the legs of the rafters. At the same time, they begin to install the brackets designed to accommodate the gutters.
A wooden block is attached to the wall of the house with anchor bolts at the same level with the frontal board.
Between this board and the bar on the wall with a gap of 40–60 centimeters, connecting jumpers are placed. After that, the assembly of the sheathing frame is considered complete.
The corrugated board is fixed on the frame with self-tapping screws and guides. It is desirable that between this material and the wall there is a ventilation gap, which should be equal to the height of the profile wave.

If the structural device of the roof requires powerful ventilation of the truss frame, it would be better to seal the cornices with the help of spotlights.