breather membrane

breather-type asphalt felt

An underlayment sheet material, saturated with asphalt, which permits the transmission of water vapor; often used as underlayment for asbestos-cement shingles.
References in periodicals archive ?
[USPRwire, Thu Oct 11 2018] A breather membrane is a water-resistant material that allows the evaporation of water when there is difference in humidity on the two sides of the wall or surface.
[ClickPress, Thu Oct 11 2018] A breather membrane is a water-resistant material that allows the evaporation of water when there is difference in humidity on the two sides of the wall or surface.
A 0.6 mm thick breather membrane non-conductive for air functioned as a vapour-conductive wind proofing insulation (hereinafter "breather membrane").
Construction elements composing roof constructions of the cells Material Thickness, Thermal conductivity, mm W/(m x K) Roof steel cover 0.55 50 Breather membrane 0.6 0.13 Mineral wool 200 0.034 Polyethylene film 0.2 - * Chipboard 10 0.13 Heat reflective film (1) 0.4 - * Cement-sawdust board (2) 14 0.213 Note: (1) used in 2, 3, 5 experimental stages; (2) used in 3, 4 experimental stages; * R = 0.02 [m.sup.2] x K/W.
Tyvek ThermaWrap is an insulating breather membrane with a combination of thermal resistance and high vapor permeability.
"Combining multi-layer breather membrane and film/highloft composites and adding highly reflective metal surfaces is the ultimate idea in the field of pitched roof insulation," commented Texbond's Alessandro Mottes.
The material is engineered by reversing the principles of breather membrane design.
The physical properties of a continuous sheet breather membrane, as compared to more traditional net support, helps to reduce the heat loss than can occur due to convection and cold air movement on the exposed underside of the insulant.