Wooden flooring device

The support for multi -layer structures made of wood usually serve as lags. They are made mainly from polymer or wood. Lags made of metal or reinforced concrete are much less common. In general, it is customary to call lags the transverse beams of the floor on which the finish coating is lined. Wooden lags are good because of their low price. Polymeric materials are valued for the simplicity and speed of installation. It is worth saying that masters involved in chopped houses still use flat logs heated on three sides instead of a bar. These logs are similarly called lags, but they are much cheaper. In any case, no matter what material is used for installation, before laying a wooden floor on the lags, the boards need to be kept for at least a year in conditions of normal humidity. On the features of the installation of a wooden floor on the lags - further.

Advantages of the material

Lags for a wooden floor have several significant functional advantages:

1. The floor for the floor in a wooden house has good thermal insulation, which reduces heat loss.
2. In addition, lags allow you to equip ventilated underground niches, where you can, for example, lay the right engineering communications.
3. In addition, they allow you to correctly redistribute the load on the layers of the ceilings located below.
4. Thanks to the lags, it is possible to create an even surface for the flooring of the floor boards.
5. It is also worth noting that if individual structures are damaged, they can be easily replaced, since wood bars can be purchased at any construction store.

Paul device on the lags in a wooden house

How to choose a cross section

The ratio of the sides of the bar for the lags should be 2: 1.5. In the event that the floor is planned to be placed on wooden beams, then there is another requirement to the lags. Their dimensions should be selected depending on the distance between the supporting supports. If you want to insulate the floor using a thermal insulation layer, then between the insulation and the lower side of the finishing coating you should leave a gap of 3.5 mm for ventilation. Therefore, when buying a beam, you need to take into account the magnitude of this clearance.

To determine the cross -section of the lag, you can use the table:

If the laid floor will use the soil as a support, then you need to take into account the thickness of the roll, which is laid on the cranial bar attached to the lags. In general, it is better to take a beam with a cross -section slightly more than the calculated value. If the floor is made over a soil base, you can not use a large section of a large cross -section in the work. In this case, it is allowed to put brick supports. The step between them should be approximately 1.2 m. At the same time, the level of groundwater should be taken into account. If it is below 2 m, then silicate brick can also be used as a material for supports.

There should be the same distance between the supports and elements of the beam. That is how competent styling is done. Before building supports, a foundation is needed. Moreover, under each brick beam a separate basis is made, 400 by 400 mm in size. It is allowed to use a strip foundation that will cover several such supports at once. At the same time, in each row of the pillar there should be 2 bricks. But the height of the pillar depends on the level of the supporting elements for the beam.

Lag Laying Rules

When carrying out installation work, you need to adhere to some rules:

1. The surface that is prepared for lags must first be cleaned properly and apply a primer layer on it.
2. The existing wooden parts must be dried and treated with a suitable antiseptic.
3. As a soundproofing material, slag, sand or fiberboard are used.
4. After the end of the floor is completed, the horizontality of the laid lag must be applied according to the rule that is applied over the beams. It is convenient to use a long level as a rule. If there is no lumen between the floor and the beams, then the work was performed correctly. If there is a clearance, the surface must be leveled by pouring sand under the lags.
5. It is advisable to install lags, focusing on the placement of a window opening. In addition, there should be a distance of not more than 350 mm between them and the walls.
6. Lags should be leveled first, and only after that can a wooden floor can be laid on them.
7. Boards should be fixed to each lag.
8. To prevent the split of the boards, holes for fasteners are made in advance. If self -tapping screws are used as an attachment of a wooden floor to the lags, then a very thin drill is used to make holes.

Laying lag on a concrete base

There are several methods for laying the lag on concrete. The first method is the use of linings, and the second is a cement screed. Consider in more detail. So, in the first case, lining of solid material of different thicknesses are used. They fit between the lags and concrete in order to align the floor level. This method cannot be called the best. But, despite this, it is used quite often. Its disadvantage is that lining can be deformed over time. This will lead to the appearance of a creak and curvature of the floor.

In the second case, as already mentioned, a cement screed is used. Its main task is to align the front surface of the floor. Lags are allowed to be laid on the surface only after the screed is flooded. This will prevent floor deformation. The screed as a support will be strong and quite reliable. But, before laying lags on concrete, you need to protect the foundation from moisture. For this purpose, a plastic film is used.

In addition to waterproofing, sound insulation will be needed. It is necessary in order to extinguish shock noise. Sound insulating gaskets are laid directly under the lags. It is allowed to use cork substrates. As for the screed, it can be cement or dry. When all this is done, you can start laying the lags. As a material for this, it is advisable to take a beam, the length of which is the same as the length of the room. In the absence of the opportunity to purchase material of the desired size, you should get a board with a length of at least 2.1 m long.

To make the design stable enough, it is better not to lay the lags on a soft insulation. It is advisable to lay the insulation material between the logs in the form of paintings. In the presence of free cracks, they can be sealed with excess scraps that remain from the insulation.

Installation of a floor lag in a wooden house

Time has shown that wood is one of the best materials used for flooring. If the wooden floor is laid correctly, then it will last a long time. During this period, it retains its appearance. In addition, the wooden floor is the most environmentally friendly. From the advantages of such a coating, it is also worth noting the simplicity of leveling the surface. The wooden floor also has good sound and thermal insulation.

For laying from tools you will need:

• axe,
• perforator,
• construction level,
• a hammer with a nail,
• saw,
• screwdriver,
• drill and wrench.

You will also need a floor for the floor, lags and insulation. The size of the lag for a wooden floor is taken 50 by 500 mm. Self -tapping screws, anchor bolts and nails are useful from fasteners. When everything is available, the lags are laid on the soundproofing material in compliance with the desired distance. The surface should turn out to be even even, which can be controlled using the construction level. The lags are attached to concrete on anchors. The boards are fixed on the lags using dowels.

Installation of wooden lag for the floor

First of all, it is necessary to prepare the base. In this case, instead of filling the sand, supporting brick pillars are built. Each support column is a separate building with its own foundation. For pouring, it is necessary to first mark the working surface. You can lay the plank floorboards in different ways. The installation method depends on the type of room where the work is carried out. So, in the rest room, the floorboards are best arranged in parallel to the stream of light. In the bath you can place them parallel to the long wall. On the veranda, the floorboards are optimally placed at right angles.

In some cases, an additional crate is not mounted over the lags. So, sometimes it is best to put the lags across the boards. When calculating the size and step of the retreat, the lag must take into account the position of the columns.

You can use the table:

We will analyze the flooring of the floor on wooden lags in more detail. As a rule, the installation of bars start from one of the walls. At the same time, between the first beam and the wall, you need to leave a gap of at least 300 mm and no more than 200 mm. The same applies to the last lag, which will be the closest to the opposite wall. By the way, you should not pour a separate foundation under each support. It is allowed to fill only one row under a few supports at once.

The most important thing is that the base protrudes behind the support circuit around the perimeter by at least 10 mm, and preferably 45 mm. Therefore, the formwork must be performed in such a way that the layer of the poured foundation is width and the length is more than 30-90 mm. The same applies to pouring the basis for each support.

The concrete base is poured as follows. First, the soil is trim. Then a formwork with sides 100 mm high is arranged. Next, a reinforced mesh is laid on the bottom. After that, concrete is poured. Next, they wait about three days while the concrete froze. Then the foundation as waterproofing is covered with polyethylene. And finally, they build supports.

When erecting a cold floor, a space remains under it, which should be covered with expanded clay or slag. But it should not fall asleep completely - you need to leave about 50 mm on top. To ensure normal ventilation of the underground space, a technological gap is left around the perimeter. In skirting boards that close the cracks near the walls, it is necessary to make ventilation holes. According to construction standards for every 15 sq.m. There should be two holes in the plinth. Thus, the total area of \u200b\u200bthe holes is obtained from 20 to 30 square meters. See so that the mice do not penetrate the house, the holes should be closed with a thin decorative mesh made of non -ferrous metal.

Paul Lags in a Wooden House: Video