You can put a thin sheet of DSP - initially it will not be noticeable, but after a few months will be visible to the structure and configuration of the floor board under the DSP, and it was sprinkling. Linoleum can be set for 110 rubles - domestic, it is rubbed in places of intense cross-country for a couple of months, and can be a commercial for 290 / meter. Lumber can never handle ognebiozaschitoy, because underneath it is not checked. All these factors can easily hide in the preparation of the offer, but I believe they need to know to describe, and selectively check. Until the opening of the sexes is in the finished module.

His ceiling structure similar to that of sex. The most important thing - the top layer - it is a drum and sealed (for example, Guerlain), or hermetically sealed. Further are lags of 100 * 50 mm and above, they do not "carry" the load such as is sex, but because of the thickness of insulation can be a lot more size. Step between 900 mm. top and bottom fit lag discharged board. On top of the 40 mm thick, the bottom of 25 mm.

All the timber is processed ognebiozaschitoy. At the bottom layer of the board, "sewn" finishing the ceiling. Insulation is placed between the lag in polyethylene. The savings here can be accounted for by - the quality of metal (galvanized or thickness) and his seal (as in welding, and rolling in), processing, packing step and thickness of lumber.