The electric wires, conduit fittings, water and heating pipes, and other pipelines are led through the chases hollowed in the 5 cm thick polystyrene layer. The chases can be hollowed out posteriorly, dust- and noise-free, without carving, with the aid of a thermo-knife. Their sizes are up to ones liking. The descent pipe of a larger drain pipe has to be placed in the cavity of the wall before concreting.

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