Self-leveling floors. Adjustable log floors. Two kinds of adjustable designs

Knows that there are several most common ways to level the floor in an apartment. And one of them is to use adjustable floors. The use of concrete screed is gradually losing popularity. These jobs are labor intensive and also involve dampness and dirt. Moreover, installation of adjustable floors will take much less time.

One worker per day is able to independently lay floors on an area of up to 20 square meters. m. Further we will talk in more detail about the advantages, disadvantages and features of the assembly of adjustable floors.

Design features

To understand what adjustable floors are, you need to familiarize yourself with their principle of operation. The studs rotate around their axis, which allows you to adjust the floor level horizontally. The same principle is used for floors on slabs, which also move due to rotation. This allows you to set the floor as accurately as possible. You can level the floor horizontally almost perfectly.

Such structures will not sag under weight or "play" over time. You can install them on any available surface. Several layers of covering (plywood) can be applied to each floor.

Such floors will become a great solution for gyms, clubs, office spaces and so on. By strengthening the bearing studs, the load indicator (up to 2 tons per 1 sq. M) can be increased. The lifespan of adjustable floors is up to 15 years.

Features of use

Adjustable floors are most often used:

At stations and rooms for the location of servers;
under final finishing as soon as possible;
In houses of new buildings;
In houses of old buildings for holding overhaul or reconstruction;
To raise the floor level to a sufficient level (especially when additional pressure on the main floor is undesirable);
When installing multi-level floors;
For carrying out all kinds of communications under the base of the floor.

If you need to level or raise your floors to a significant level, then using leveling floors is a great solution. After all, for laying a concrete screed, you will need a month, while with adjustable floors you can do it in one or two days.

Also, the use of such systems is useful in houses where a distance of up to 15 cm was specially left under the floor for laying communications or insulation. Not all structures will be able to withstand the load of such a layer of concrete. But the use of adjustable floors will help you raise the level of coverage up to 20 cm.

You can also successfully, for example, move plumbing fixtures (toilet or bathroom) and hide bulky communications not under a thick layer of mortar, but under the floor, where they will remain accessible at any time.

The use of such systems for country houses or cottages. So you are given the opportunity to hide all communications in one place, where they will be reliably protected from exposure and available when needed.

Pros and cons

As with any similar systems, there are also advantages and disadvantages here.

Advantages:

One worker can complete the installation of the adjustable floor in one working day;
The adjustable floor system is light in itself, so it will not be able to put additional pressure on the main floor;
International tests confirm the quality, strength and durability of such systems;
Using adjustable floors, you can additionally isolate the room from outside sound;
You are given the opportunity to use the floor to hide all communications, which is a plus not only from an aesthetic point of view, but also safely collects them in one place;
Maximum accuracy when setting the horizontal floor level;
Various levels that can be used in parallel (up to 20 cm);
Materials used for manufacturing are tested for purity;
It becomes possible to quickly correct floor irregularities, even with a discrepancy of 10-15 cm;

Such a system is durable

Flaws:

Adjustable over time. To avoid this, even at the installation stage, it is necessary to remove all dust and dirt after drilling the holes and hammering in the dowels. It is best to use a vacuum cleaner for this. Also thoroughly clean the first floor surface before installing the second layer. Make sure all dowels and nails are fully driven. This will prevent the structure from loosening. It should also be borne in mind that a tree - natural material that breathes and is able to deform under the influence of moisture or weight. Over time, squeaks, one way or another, will appear;
If you raise the floor level by long distance, then when walking on it, additional sounds will be heard. For example, a woman's heels will sound like a drum hit. The installation of additional sound insulation will help to correct the situation.

All your work depends on the quality of the materials used. Pay special attention to their choice. High-quality timber and plywood will save you from the need to dismantle the floor in the future.

For maximum accuracy when leveling the floor, use a laser level.

Take care to provide adequate ventilation under the floor covering.

Types of adjustable floors

Depending on the type of construction, adjustable floors are divided into two groups:

plates;
lags.

With the help of adjustable slabs, you can raise the floor to a distance of no more than 3 cm. This is not much, but enough to carry out the necessary communications: telephone, Internet, and so on. You can also install thermal insulation and soundproof materials under such floors.

Such structures are sheets of thick plywood (you can use several layers of it). Special bushings are inserted into it. The peculiarity of these bushings is that they already have a special internal thread. An anchor is threaded into it for an adjustable floor, which will serve as a level regulator. Then the whole structure is installed on the base and fixed with dowels.

As already mentioned, the difference between such a system is that the floor level is adjusted directly through the holes in the plate (from plywood or any other suitable material).

To assemble a floor based on adjustable slabs, just follow our advice:

Drill holes in the plywood sheet;
Then insert the bushings into them, on which the thread is pre-screwed from the inside;
Insert special bolts into the bushings, which will adjust the level of the plate;
Fix the bolts to the base;
Turn the bolts until you achieve a perfectly flat floor plane;
After that, the remnants of the bolts that look out above the surface of the plates must be cut off with a grinder;
The final step in the assembly is to lay the next layer of plywood to hide the bolt marks.

Please note that when laying a new floor layer, its seams should not coincide with the seams of the previous one, since this will not make the structure strong.

Adjustable floor joists are the best alternative today. When using such a structure, the floor will be raised by at least 5 cm. This distance can be successfully used to isolate the room from sound or odors, as well as to lay all the main communications of an apartment or house.

Such designs are distinguished by simplicity and speed of assembly, as well as reliability and durability. The lag is equipped with special sockets for installing bolts. It is fixed to a special base with dowels. To change the floor level, it is enough to rotate the bolt in the right direction... After full leveling of the floor plane, a coating is applied to them.

Such floors are often used in buildings. new building superior comfort, in which all major communications are laid under the floor.

The main advantage of such systems is their strong fixation to a wooden or concrete base. Other materials can also act as a basis. For example, threaded anchors can be installed on concrete plates, hollow inside, wooden beams using self-tapping screws, as well as on brick surfaces with a concrete screed using special fasteners or to wooden floor.

To properly assemble such a structure, read our instructions:

Special racks (bolts) are installed in the nests in the log;
Now lay out the logs around the perimeter of the room and inside it. Here it is necessary to take into account the required sag strength of the structure, which depends on the type of flooring used. For example, the distance between the lags should be about half a meter. If you will be using floor tiles, then maintain a distance of no more than 30 cm. To ensure the necessary air circulation, step back one centimeter from the walls;
Then, through the holes provided in the logs, drill holes in the floor for installing the bolts. Their depth should not exceed 4 cm;
Next, you have to expose the floor covering to required level... Please note that the side difference should not exceed 1 mm. To adjust, use a special key that turns the bolts;
After exposing the floor, hammer in the protruding parts of the dowels or cut them off with a grinder or chisel.

Next, the installation of the flooring is carried out. First, use two layers of waterproof plywood. Attach the first layer with self-tapping screws directly to the joists. The next layer of plywood should be installed with a slight deviation from the first so that the joints do not coincide. In case of use floor tiles, it is better to use waterproof drywall as a second layer.

Use skirting boards to hide unevenness and gaps between flooring and walls. In some cases, experts recommend installing them after all finishing work.

As you can see, an adjustable floor with studs or slabs is a pretty good alternative to a conventional concrete screed. Moreover, to install such a structure, you do not need to have special construction skills. You just need to be patient and do everything according to the instructions. If you have ever encountered the problem of installing such systems, share your comments under this article.

Adjustable log supports are one of the most simple ways leveling the sub-floor. Thanks to this technology, it is possible to avoid "wet" works associated with the pouring of the screed. This allows the finishing coat to be laid on the sub-floor immediately after the installation of wooden lathing from logs and chipboards. The article will consider the main types of supports suitable for adjusting the height of floor beams, as well as the features of their application.

Design features of adjustable lags

To level the subfloor, not so long ago they began to use not only screeds, but also logs on adjustable supports. What is the principle of this design? Anchoring devices with a screw mechanism are attached to the base material, which can be adjusted in height. The floor beams are then positioned so that the timber battens are as horizontal as possible.

In the process of leveling the floors, supports of various types of construction and material can be used. They can be attached to the following types of bases:

wooden beams;
concrete plates;
cement screeds;
reinforced concrete monolith.

Do-it-yourself installation of such systems is undesirable, since it implies precise height adjustment of the beams. A similar effect can only be achieved with the help of professional devices. Unevenness in the floor leads to a violation of the geometry topcoat, which is fraught with its deformation.

Benefits of adjustable floors

Compared to other methods of leveling floors, joists, which can be varied in height, have a number of advantages, namely:

This technology eliminates the need for "wet" technical processes associated with the pouring of self-leveling and cement-sand screeds;
Wooden structures weigh less in comparison with concrete screeds, therefore, they can be installed on bases with a low bearing capacity;
After preparing the floors using this technology, almost any type of topcoat can be put on the rough base;
The space under the joists, formed by screw anchors, ensures sufficient ventilation of the floor, which prevents the accumulation of condensation;
Do-it-yourself installation of adjustable supports is done in just a few days. While any cement strainer dries for at least 3 weeks;
The space under the floor can be used for laying the necessary communications;
In the process of leveling the floors, the level of the base can be raised by 15-20 cm if necessary;
Styling finishing materials can be carried out without mounting any additional substrates;
An air gap under the joists provides additional thermal and waterproofing of the base.

Types of adjustable structures

When arranging the floor with your own hands, you can use several various designs with adjustable lags. Each of them has its own advantages and disadvantages. The most popular "jacking" systems include:

Set of threaded plastic uprights and concrete fasteners. In this case, a thread is cut into the beams with your own hands, into which hollow racks are inserted. If necessary, they can be screwed in to the desired depth;
A set of fasteners for concrete and plastic sleeves. Unlike the previous design, ready-made bushings with an internal, not an external thread, which are additionally fixed with self-tapping screws, are mounted in through holes in the beams;
A set of logs, bushings and bolt-posts. In this system, for leveling the floors, the bolts have through cone-shaped holes, into which self-tapping screws or other fasteners are inserted to securely connect to the concrete.

To buy a quality kit, first of all, you need to check the quality of the supports themselves. The threads on them must be smooth without any damage. Otherwise, it will not be possible to set the desired log height, which is fraught with distortions.

Plastic metal supports

Arrangement of the sub-floor using "jacking" systems involves the use of special threaded supports. They are conventionally divided into two broad categories:

Metallic. They are made of galvanized steel, therefore they practically do not corrode. Such anchoring devices are capable of withstanding very heavy loads and are therefore used in the arrangement of commercial premises. The only but significant drawback of such supports is “assistance” in the destruction of the concrete base. Over time, metal pins "dig" into the base, which leads to its cracking;
Plastic. Unlike metal racks less durable, but completely unaffected by moisture. In the case of installing stud bolts with a small pitch, they can withstand loads of more than 300 kg per m2 of coverage. Plastic supports practically do not create loads on concrete floors and therefore do not contribute to their destruction.

Types of supports by type of structure

What types of floor leveling racks are best to use? When arranging "jacks" wooden lathing can be used different types anchor devices, namely:

Hairpins. In the process of finishing the subfloor, threaded studs are attached to the base. On them are fixed two adjustable "plates", between which there is a beam. By rotating the lower plate, you can adjust the height of the beam, and the upper one is fixed to make the structure more rigid;
Corners. Metal U-shaped profiles are initially fixed with the base down on concrete floor... Each side of the corner contains two or three rows of through holes spaced from each other with a small pitch. After setting the required level, the lags are fixed in the corners at the required height;
Racks with automatic height adjustment. Plastic racks with automatic regulation have a jack mechanism. Thanks to them, it is possible to carry out automatic correction of the lag in height with a slope from 0 to 5 degrees.

Prices for professional supports

Manufacturers offer a lot of adjustable racks of various types. And it is not always clear why the price of a particular model of supports is formed, when visually some of them are very similar. To buy really high quality anchor devices, consider the differences between the budget and professional series products:

Budgetary supports. The price of this series of screw anchors ranges from $ 1 to $ 3 per piece. The low cost is not due to the most best quality the material from which the bolts are made, as well as their fragility;
Professional supports. Visually, professional screw racks are similar to budget ones, but they are made of special plastic. It has thermal and frost resistance, as well as greater strength. Some of them are equipped with a self-leveling system, so that the floor leveling procedure takes a minimum of time. The price of professional supports ranges from $ 4 to $ 8 per piece.

How to make screw supports?

There is no need to buy expensive stud bolts to equip floors with adjustable beams. Knowing already some of the features of the system, which were considered above, it will not be difficult to make such devices yourself. To assemble anchors with adjustment you will need:

nuts;
metal plates;
hairpins;
drop-in anchors;
washers.

Assembling the floor leveling screw support:

The first step is to secure metal plate on a hairpin with a powerful bolt and a nut of a suitable size;
With the help of a nut, the beams will be adjusted in height in the future;
After adjustment, the lags are fixed with another nut;
So that the top nut does not interfere with the installation of the topcoat, on wooden beams grooves are made to completely mask it.

Reading time ≈ 5 minutes

Adjustable floors can be made instead of concrete screed. The main thing is to find out in advance all the features of such structures and their installation.

If you've ever done major renovations, you know how difficult it can be to level the floor. The solution may be to install an adjustable floor. It is an affordable alternative to concrete screed that does not require a lot of effort or time to create.

What is an adjustable floor?

In the old days, floor coverings were laid on logs and concrete screed. However, today all more builders prefers adjustable floors. It is O rough field, made in the form of plywood flooring or log. The height of the surface can be controlled using special rack blocks.

The essence of the design is to use 18 mm plywood sheets or a log made of wood. One or the other is supported by bolt stands made of wear-resistant plastic. By turning around the axis, the bolts change the height of the plywood or log, making it possible to accurately level subfloors. After the structure is leveled, the bolts are securely fixed to the base using dowel nails.

The base can be: beam (wooden) or concrete (with a screed, hollow, monolithic). On the logs, as a rule, they have moisture-resistant plywood. Further - any flooring ( , parquet board, parquet, etc.). In order to better understand what are adjustable floors made of plywood or on logs, you should look at the photos and videos on our website.

It is most advisable to use the structure in the following cases:

It is necessary to level the flooring for finishing in the shortest possible time;
It is necessary to raise or level the floors to a significant height (a concrete screed will take a month to lay. An adjustable floor can be installed in a couple of days);
Space must be left for communication systems;
It is planned to create a multilevel floor;
It is necessary to make a new floor in an old building during a major overhaul or to create it in a new building.

Types and features

Lags

If you will use adjustable feet and logs, then the structure will be able to rise by at least 5 cm. This height will allow you to find a place for additional sound and heat insulation, as well as for any communication systems.

You can easily assemble the floor on adjustable logs with your own hands. The lags have technological holes into which it will be necessary to screw the stud bolts. The logs themselves are installed on the base and fixed on it using long self-tapping screws with dowels pre-hammered into them. After that, it is necessary to level the logs by tightening the rack bolts. And then lay the finishing floor.

Choose adjustable floor joists and you'll be able to build a durable, solid structure, even when you're alone.

Slabs

If for some reason you are not tripled by adjustable floors on logs, you can create a structure from slabs. The surface will rise at least 3 cm.

IMPORTANT! In the case of adjustable plywood, there will be enough voids for different wires, not enough for large communications.

Several plywood sheets act as slabs. In the lower one, technical holes are made for the bushing with internal thread... Legs-bolts on one side are fixed on the base of the floor on self-tapping screws, on the other - they are screwed into the bushing. The bolts must be rotated to level the surface.

Arguments against"

Adjustable floors have several disadvantages to be aware of before deciding to install:

The floor will start to creak. Even if every anchor and every screw in the system is of high quality, this problem is not easy to avoid. Only a competent approach will help to cope with it: during installation, get rid of all the dust and dirt remaining after hammering in the dowels and drilling holes. Before applying the second layer, clean the first thoroughly. Each nail should be driven to the maximum. Unfortunately, wood in any case will deform from the severity or humidity in the premises. Such a floor will certainly begin to creak;
By raising the floor to a greater height, you will hear additional sounds in the future. For example, women's heels will sound like drumming. Additional soundproofing is required.

Arguments for"

The list of benefits is longer:

Ease of installation. You can install the structure with your own hands within 24 hours;
The adjustable floor is durable and reliable;
The design allows for additional soundproofing of the premises outside;
All communications can be safely and reliably hidden from prying eyes in one place;
To expose horizontal level floor surfaces can be most accurately;
The system is created from environmentally friendly materials;
Even if the floor does not correspond to 15 cm, the situation can be corrected in a short time.

Choice of materials

We have already said that an adjustable floor is created in two stages:

Installation of a lag with movable supports;
Arrangement of flooring.

Which sheets to choose? It depends on what the top coat will be. If you want to install parquet or laminate panels, use moisture resistant plywood... If tile or linoleum, choose moisture resistant plasterboard.

For a wooden floor, experts advise taking a grooved and smooth boards... Supports can be different, but their difference from each other lies only in the way of adjusting the height of the flooring - floors on corners or on hairpins.

The device of a wooden floor on logs is the same one, long forgotten old technology, which was reborn like a Phoenix, and acquired the shape of a new, advanced one. Engineering advances contributed to the return of the idea: concrete slabs and modern ways manufacture of hardware.

Wood floors: advantages and disadvantages

Traditional styling the floor was based on the following operations: in the house, logs were laid along the base every meter, to which the boardwalk was attached. The advantages of floors on logs in front of concrete screeds that have come to replace them are undeniable:

Decking made of natural wood warm. This is known to those residents of old buildings, whom households often reproach for the unforgivable sin - the habit of walking around the apartment barefoot.
Its surface can withstand significant loads, impacts, repairs, and restructuring. At the same time, it does not chip off, does not crack, nothing falls from it;
In most cases, coverings laid decades ago are still alive. They were ennobled, covered with parquet and carpet on top, but the natural basis was preserved;
The price of the material - wood - is relatively low: by the middle of the last century, this material completely replaced clay coatings.

The lack of technology was significant. This is the laboriousness of installation and, accordingly, its cost. The difficulty was in leveling the plane of the board. Finding adjustable supports (brackets) for the beams was not easy, it was even more difficult, almost impossible, to fix them: the ground was an unreliable foundation, and there was nothing to break through the concrete (already existed).

Preparation for work

It is required to find a solution to the problem:

The floor should be wooden, fixed on logs;
The bases for the plank flooring device must be adjustable.

At the same time, the laboriousness of the installation of the lag should be such that the wooden flooring in the house can be made by one master (at most two) in a couple of days. There are such solutions. Their price corresponds to the average cost of flooring. Installation is so simple that the work can be done by one person. At the same time, the reliability of the fastening remains one hundred percent.

The principle of installing floors on adjustable joists

Modern concrete structures, in which the slabs serve as a rough base, made it possible to return to an environmentally friendly, reliable, warm wooden floor on logs. Due to the widespread use of power tools, the development of technology, a wide selection of hardware, it is possible to lay the flooring in the house on adjustable joists.

There are many options for how to install and how much to pay: beams, for example, are mounted on adjustable prefabricated anchors, the price of which is 3-6.5 USD a piece. You can buy carpentry corners (which is cheaper) and install the floor in the apartment yourself. You can invite a specialized team: the estimated installation price will be 19-20 USD. for 1 m 2.

An innovative way

The technology is patented using plastic threaded sleeves and dowels. The sequence of work is as follows:

V wooden beams through holes are drilled;
They are screwed into threaded polymer pins-sleeves. In the future, these fingers will serve as support legs;
The beams are installed in their proper places;
Sleeve bottom fixed to the concrete base with a dowel. The mountings should be located exactly in the center of the sleeves, allowing them to rotate around the axis;
Now the sleeve serves as a worm - its rotation leads to the movement of the beams in height;
Using the spirit level, all the bars are brought to one level;
The liner shank remaining on top is cut off with a chisel;
After completing the leveling, planks, plywood or other covering are laid.

A similar technology is used to lay plywood without boards. The base device is performed as follows:

Support sleeve-brackets with an internal thread are selected. Through holes are drilled in plywood with a pen at the places where the supports are installed;
The bushings are inserted into the holes and fixed on the sheets with self-tapping screws;
Polymer sleeves are screwed into the resulting slots.

Further actions are similar to the previous technology. The manufacturer offers a video that can be viewed at the end of the article.

The costs are formed on the basis of how many and what kits will be used. The price of one set of four logs with bolts, set by the manufacturer, depends on the length of the timber: 1000 mm costs $ 20, 2000 mm - $ 33, and 3000 mm - $ 45.

Available option: brackets

In addition to polymer sleeves, adjustable lags in the house are mounted on U-shaped racks. Each stand-bracket on the side surface has a pair of holes located on different levels with a step of 5 mm. If you modify the brackets yourself, then you can provide as many levels as the master considers necessary. The device of a wooden floor is performed as follows:

Through each meter, the axes are marked along which the beams will be laid;
On the lines set U-shaped mounts and screw them to a concrete slab;
The degree of deviation from the horizontal of the rough base is measured, the points of the minimum and maximum height are determined;
Calculate the height of the mid-level attachment;
The extreme beams are installed and their horizon is brought to a given level;
They are installing all intermediate bars, checking their level along the extreme lags.

At the end of the work on the installation of the beams, the extra "ears" of the racks are cut off and the flooring is installed - boards, other slabs.

Floors on furniture stud supports

Another way of laying logs on adjustable supports is to use a furniture stud, double-sided - with a metric and single-start thread. They have been used for a long time for attaching hinged elements to concrete, brick, wood surfaces... To lay a wooden floor on logs, studs with a cross section of 8-10 mm are suitable.

The bars must be prepared in advance. To do this, every 30 cm drilled into them:

Holes corresponding to the section of the studs;
Coaxial half-holes with a diameter of 20-25 mm and a depth of 20 mm - for screwed nuts.

The device of floors in the house is performed as follows:

Bars are laid in increments of 1 meter;
V concrete base drill holes that match the holes in the beams;
Install polymer dowels;
Screw in the studs.

The next step is to prepare the support brackets: two nuts are screwed onto the studs and washers are put on, external diameter which exceeds 30 mm. Install the beams so that they rest on the washers; one more nut is baited from above. The heights are leveled: the level is set with one lower nut, the second - with a locking nut - is fixed. The installation of the subfloor is completed with the operation of tightening the upper nuts. With the help of a grinder, they cut off the protruding ends of the studs and prepare the flooring - boards, plywood, OSB.

The price of the work is minimal: you can do it yourself. The cost of hardware matters, but they are considered consumable... Compared to the cost of the main raw material, this value can be neglected.

The technology of adjustable floors has appeared on the market relatively recently, but has already gained popularity among builders, and good feedback by users. Why? The answer is simple - it has a lot of advantages. Among them are the following:

high speed of flooring. One person can design up to 20 sq. in a day;
achievement the desired height floor without additional costs for materials;
the ability to create a multi-level structure;
almost perfect alignment accuracy. The permissible deviation is 1 mm. by 1 rm floor;
reducing the burden on supporting structure... Wherein, permissible load for logs - up to three tons. This significantly exceeds the possible load not only in residential, but also in industrial premises;
elimination of the need to carry out a "wet" screed;
good ventilation and sound insulation characteristics of the floor;
opportunity to equip underfloor heating under plywood;
environmentally friendly, time-tested materials;
the ability to hide the layout electrical networks, hide the pipes and at the same time provide free access to them if necessary.

In fairness, we note and limitations:

the possibility of a squeak. In the event that construction debris has fallen into the attachment points. It, even at the installation stage, must be removed with a vacuum cleaner. It should be borne in mind that wood is a "living" material, it deforms over time. So get ready;
the possibility of "sounding" the floor. If the floor is raised too high, the void underneath will accompany you with a booming echo with every step. This disadvantage can be easily eliminated by using heat-insulating materials.

However, as you can see, the advantages of an adjustable floor are much greater and it is quite easy to get them. The technology is so affordable that it is adjustable floor can do it yourself and without vocational training... And this instruction, we hope it will help you with this.

Before starting work, you need to decide on the structure of the floor, as well as prepare the tools and materials. But first things first:

Design

floors adjustable over slabs. Provide lifting heights up to 5 cm;
floors adjustable by lags. Provides lifting heights over 5 cm.

In practice, both are used. But the first became very popular. Nevertheless, despite the different permissible lifting heights, the technology of their construction does not differ significantly.

Tool

The minimum tool that you will need to work on the construction of an adjustable floor consists of:

puncher;
screwdriver or screwdriver;
circular saws;
jigsaw;
chisels;
building level;
roulette;
consumables such as drills, discs, jigsaw files, drills.

Material

The amount of material depends on the size of the floor. But, for understanding, we will give a calculation of the amount of materials for 5 sq.

For slab-adjustable floors you will need:

plywood - 5 or 10 sq. Depends on the required number of flooring layers;
self-tapping screw 3.5x35 - 150 pcs. For fastening layers of plywood to each other;
threaded bushings - at least 20 pieces. Will play the role of wooden logs;
dowel screw 6x60 - 35 pcs. For fixing the logs to the concrete base.

To arrange floors on logs, you will need: timber, section 45x45 - 14 m.p .;

plywood or OSB on the floor - 5 sq. or 10 sq. - if double decking is planned. When calculating plywood, add 5% on waste. Then, round off the amount of material to whole sheets;
dowel screw 6x60 - 35 pcs;
wear-resistant polymer bolt 100 or 150 mm - 20 pcs. To adjust the height of the surface;
self-tapping screw 3.5x45 - 150 pcs. For laying the first layer of plywood on logs;
self-tapping screw 3.5x35 - 150 pcs. For laying the second layer of plywood on logs;

Features of the choice of timber

Dried timber made of pine wood can be used as a lag.

Features of the choice of material

An important point is to choose the right material. Professionals recommend giving preference to plywood. This option can provide simultaneous floor insulation with plywood... To form one layer - the sheet thickness must be at least 18 mm. If there are two layers, it is permissible to use sheets with a thickness of at least 12 mm.

In work, it is permissible to use plywood grade 3/4. But the requirements for moisture resistance must be met. Permissible humidity not more than 12%. This is achieved by using FSF or FC plywood.

Installation technology

Consider two options

Option 1 - Slab-adjustable floors

Such a floor is equipped if the surface is characterized by slight deviations from the level. And the ceiling of the room is low. Those. there is a need to save every centimeter of height.

The installation process in this case is simple and consists of the following steps:

1. Cut plywood sheets into required pieces. Spread them out on the floor and mark them. In order to know exactly where which sheet will be located in the future.

2. Holes are drilled in plywood sheets required diameter... Bushings are inserted into them.

3. Sheets of the first level are laid on the floor surface

4. The sheets are fastened to the floor using dowels.

5. Using a key, the floor height is adjusted by twisting the threaded bushings.

6. Be sure to use the building level.

7. All protruding parts (threaded bushings) must be cut off.

8. If a second layer of plywood is provided, it is laid on the first one and fixed with self-tapping screws.

When laying the second layer, it is important to follow the sequence in which the sheets are applied. And ensure the absence construction waste between them. To do this, the surface must be vacuumed.

The seams of the previous layer should not coincide with the seams of the next one. Figuratively speaking, they should be located like bricks, overlapping each other.

9. The floor covering is being installed.

Option 2 - Lag-adjustable floors

1. Drill holes in the log. The distance between them should be within 300-450 mm. The higher the load is planned on the floor, the more often the logs have to be drilled.

2. Arrangement of the lag begins from the ends, which are attached to the floor. Then the middle of the bar is attached. It is important not to fully tighten the bolts right away to be able to adjust them.

Note the regulating device can be made by yourself. To do this, you will need:

metal plate;
hairpin;
drop-in anchor;
two nuts and washers;

3. Lags are set by level.

4. The floor height is adjusted by tightening the bolts.

5. Protruding bolt heads are removed with a chisel.

6. Plywood sheets are attached to the logs. The mounting method is similar to that described in the first version of the adjustable floor arrangement.

Conclusion

This approach to flooring is becoming more and more popular. This is due to the ease of installation, the relative cheapness of materials, the ability to do everything quickly and without the involvement of expensive professionals.

600 rbl

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550 rbl

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