Insulation cotton shall be put on waterproof breathable membrane and vapor barrier membrane to prevent metal roof from condensation

Definition of metal roof:

Metal roof usually refers to Profiled metal plate or Metal sandwich panel The roof enclosure system is connected with the support system through fixed supports and fasteners, and the roof load is transmitted to the main structure through the support system, and the angle between the roof panel and the horizontal direction is less than 75 °.

According to the principle of condensate generation, corresponding structural layers are set to prevent the air flow containing water vapor from moving between the structural layers of the roof system, Vapor barrier （ Vapor barrier ） And Waterproof breathable membrane （ Waterproof vapor permeable layer ） Are extremely important structural levels.

Definition of vapor barrier:

Vapor barrier : Prevent the water vapor from entering the insulation layer, and avoid the drop of thermal resistance and condensation when the moisture content of the insulation material increases.

Definition of waterproof breathable membrane:

Waterproof breathable film or waterproof vapor permeable layer : It has wind proof, waterproof and vapor permeable functions, which can block the external water and air flow outside the building, prevent the penetration of cold air, and at the same time, it can exhaust the moisture in the interior and walls to the outside.

The structure of commonly used metal plate roof is too simple, usually only metal panel, insulation layer (including aluminum foil veneer), and metal bottom plate. Such structure cannot meet the basic air and water tightness requirements of the fabricated enclosure system. When the temperature difference and humidity between indoor and outdoor buildings reach a certain state, condensation will occur in the system and condensate will be generated. choose Waterproof breathable film, vapor barrier film Select the manufacturers and those with good reputation.

No choice Waterproof breathable membrane and Vapor barrier , causing condensation

Special waterproof and breathable membrane for metal roof , please choose the brand of Kedebang, professional Waterproof breathable film manufacturer ， twenty year Production of waterproof breathable film Experience. Keep away from roof condensation, please put on your metal roof Kedebang waterproof breathable membrane 、 Vapor barrier 。