Vented flat roofs – It is a type of solid flat roofs, in which there is e.g.. perforated roofing felt underlay. Thanks to the perforations, the roofing felt enables the elimination of excess air and water vapor pressure, thus eliminating the blisters.
Ventilated flat roofs
• Kanalikowe
Ducts are made above the thermal insulation material, e.g.. by laying a corrugated sheet on the thermal insulation layer as a base for the top screed. Ventilation of such flat roofs requires the use of the so-called. collective channels, thanks to which air can enter all the channels.
• Szczelinowe
Gaps are created over the thermal insulation material by separating the roof panels and thermal insulation (e.g. made of concrete trapezoidal slabs arranged directly above the thermal insulation).
• Dwudzielne
Flat roofs with low passage space, formed by a roof with a covering and a ceiling, on which the thermal insulation is spread. In terms of construction, bipartite flat roofs resemble unused attics in pitched roofs.
The structure of the upper slope of a two-section flat roof can be made of corrugated boards placed on openwork brick walls or in the form of a light wooden or steel structure covered with waterproof plywood..