ROOF Russian patent published in 2008 - IPC E04D11/00 

FIELD: construction, particularly vented roofs.

SUBSTANCE: vented roof comprises deck, vapor- and heat insulation means, vapor-permeable water-tight membrane of roll material overlapping each other and roof covering of steel profiled material laid on base and secured to roof frame through membrane. The frame is made of C-shaped profile having height selected to provide space between vapor-permeable water-tight membrane and heat insulation means. Widths of overlapped membrane web areas are determined as L≥S·γ/α, where L is overlapped membrane web area width, cm; S is distance between heat insulation means and membrane, cm; γ is limiting wetting angle of vapor-permeable membrane side, deg; α is roof inclination angle, deg.

EFFECT: increased roof covering base rigidity.

3 cl, 5 dwg