How house wrap are waterproof
As long as the building's hot air volatilization touches the roof and wall with lower temperature, condensation will occur when condensation occurs, water droplets will form on the roof or wall surface and be absorbed by the building, thus destroying the wall and roof structure, or dripping, damage the building's objects. One solution to prevent condensation is to reduce the water pressure in the room by strengthening ventilation, and install insulation and damp-proof reflective film.
Installation of house wrap Any water vapor needs passage through the building isolation layer or building structure, house wrap can allow water vapor to pass through smoothly. When water vapor condenses into droplets on the insulating layer, the droplets drop onto the house wrap, which is waterproof.