How to make lags?
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For arranging wooden floors in the house to you, no matter what kind of wood materials you will lay in the future - boards, plywood or chipboard, you will first need to lay logs on the base of the floor. The lags are the transverse beams on which the finish wood is fastened and attached.
How to make floor lags
Lags are made of long and smooth wooden bars of rectangular cross-section with an aspect ratio of two to three or one to two, i.e. the height of the log should be inone and a half to two times its width. The most common cross-section of the timber used for the manufacture of lags - 100 to 180 mm. In order to make logs from bars, they need only to be cut into pieces of the required length.
For lags, wood of the second or third kind of inexpensive coniferous trees, such as spruce, pine or fir, is usually taken, the main thing is that these boards are well dried and have no obvious defects.
In order to protect the bars from fungal and mold damage, as well as from their damage by wood bugs,Wood lags before laying should be carefully treated with special antiseptic solutions, and for a more complete protection, it is better to perform this treatment twice.
How to put lags
First you need to determine the direction in which you want to lay the logs. When choosing a direction are guided by the following simple rules.
- In rooms with windows, floorboards are laid along the main stream of natural light.
- In the corridors, the boards are laid in the direction of travel from door to door.
- Lags are always laid in the direction perpendicular to the direction of the boards laid on them.
Next, you need to calculate the step with which you will lay the logs. From rightThe chosen pitch depends on the strength of the wooden floors. Too big a step will lead to the deflection of boards that will creak and "play" under your feet. A significant reduction in the distance between the lags will harden the coating, but will also lead to higher prices for floor laying.
Choosing the best option, first of all, you should consider the thickness of the flooring boards - the thinner the board, the smaller the distance between the lags should be.
If the thickness of the floorboards is 20-25 mm, the logs should be installed in 30-40 cm increments. 50 mm thick boards make it possible to increase this distance to one meter. Most often in apartments make floors of four-centimetric boards. In this case, the lagging step is 70 centimeters.
How to lay logs
Lags can be laid directly on the earthen base, on the wooden beams of interfloor overlappings and on the base of reinforced concrete slabs. Each of these methods has its own characteristics.
In this case, the logs are laid on low columns built of brick, which are built on the foundation of cement mortar, poured into a formwork, immersed in a pre-rammed soil.
The foundation is made either for each individual column, or poured long rows spaced from each other at a distance of the lagging step. The size of the foundation under one column - forty to forty centimeters. The depth of immersion of concrete support in the soil - at least twenty centimeters. Five centimeters of the foundation should protrude above the ground surface.
A piece of waterproofing material is laid on the foundation,they put a column of brick on top, cover it with another piece of waterproofing, and the logs themselves are already laid on top of it.
Laying on wooden beams
With this method, logs are attached directly to the beams. It is more convenient to fix the logs to the sides of the beams. This allows you to immediately adjust the level of lags, without using any gaskets.
The slope of the lags is controlled by the building level. Finding the right position, logsfix it and attach them with long screws to the side beams of the ceiling.
If the beams are laid too rarely, over the first layer of lags in the perpendicular direction they are laid with the second layer with the necessary step.
Laying lags on the base of concrete slabs
In order not to have hassle with leveling the lags, a waterproofing layer is applied to the floor slabs and a cement screed is made according to the rules. After the screed is completely dry, lags are laid directly on it.
How to fix lags
Previously, logs were attached to the base with ordinary long nails. NowThe most common method of mounting with metal corners.One part of the galvanized corner with long screws is attached to the side of the log. The second part is fastened with screws to the wooden base of the floor. If you have a concrete foundation, the lag must be attached to it with screws and plastic dowels. In addition to the corners, you can use special U-shaped brackets sold in the store. They are just like the corners attached to the logs and the floor with screws.