General rules for laying parquet
Concrete substrate, on which the parquet will be laid, it must be smooth, equal, clean and dry. The concrete finish coat cannot crumble or break. It is best to check the smoothness of the surface even, a wooden batten approx 2 m, moving it along and across the room to be lined. Over a two-meter length, the deviations should, in principle, not exceed more than 5 mm. Protruding tumors should be picked off, and even out any holes with pieces of roofing felt while laying. In case of greater unevenness and undulations in the substrate, it will be necessary to re-pour the concrete finish. In ground-floor rooms, above unheated cellars, it is good to stick a layer of insulating felt to the base and then put parquet on it. However, if there was a concrete layer of roofing felt in the ceiling, this activity is then unnecessary.
When controlling the smoothness and evenness of the surface, special attention should be paid to the corners and passages of communication routes. It often happens, that the door had a concrete "empty hill" with improper setting of the metal frames.
Laying parquet in rooms not exceeding 20 m² can be started from one of the walls. If the arrangement will be done in one sequence, i.e.. passing the same pattern from room to room without separating them by a threshold, then it is good to start laying from the load-bearing wall running along the entire flat.
Traditional, herringbone stacking pattern, with rows running parallel to the windowless walls requires the adoption of the first row of planks at an angle of 45 °. Any circular saw with a cutting range above will be suitable for trimming the staves 3 cm, with fine toothing and a work table. The perfect tool for these purposes is the "Celma" drill with an attachment - a circular saw and a table. With some skill, 45 ° trimming can be achieved without having to use a guide. To do this, cross out two on the saw table, three lines on either side of the dial, running at an angle of 45 ° to the cutting plane. By leading the plank parallel to these lines, we obtain the desired trim angle.
Before starting the laying process, the corner of the room should be made of staves, draw a right angle on them, cut and try on dry (drawing).
Drawing. Measuring and trimming the staves in the corners of the rooms.
There is often a rounded corner of a room and then you have to make a cutting correction. In order to maintain the correct play between the wall and the first row of planks, which should be 1-2 cm, it is good to prepare wooden slats in width 1,5 cm and a length of 1-2 m. In the process of laying, they are inserted between the wall and the first row, and then it moves along the wall, securing the previous places with clinics of similar width cut from the remains of the plank. Clinics are inserted at the joints of two staves, into every other connector. Clinics should not be closed down, but only to put it on loosely. Because wall curves happen very often, so it is better to fill clinics with not always the same space from the wall.
After completing the preparatory steps, you can start coating the substrate with the adhesive. The mastic is spread over the substrate with a specially prepared trowel consisting of a shaft, approx 1,5 m and a stave nailed at its end. The width of the trowel makes it easier to spread the adhesive into one row of the laid plank. Because if you do not practice, there is a risk of dirtying the walls, it is therefore recommended to spread the mastic under the walls with a notched trowel. The layer of mastic must not be too thick, because it will squeeze through the slits onto the surface of the planks and leave it permanent, black spots at the connectors, not sandable. However, the entire surface of the substrate must be covered with it. After coating the strip, it is best to wait a dozen or so minutes for the adhesive to spread under the influence of temperature and collect any excess with a trowel. The mastic is spread in stripes of a width slightly larger than the width of the row of staves to be laid. This is especially important in the first phase of laying when we cannot stand on the laid floor yet.