Vapour Control Barrier Roof

A vapour control layer is a vapour tight or a vapour check membrane that is installed on the warm side facing towards the liveable area of a roof or on the inside of the exterior house wall.

Vapour control barrier roof.

Improperly installed a vapor barrier may actually trap moisture inside a wall while a wall that is more porous can breathe effectively and be less susceptible to long term moisture problems. Classic compact flat roof the most famous double vapor barrier of them all. The roof membrane on the top is clearly a vapor barrier. The risk of condensation through warm air from the inside of the building coming into contact with cold surfaces in roofs and walls.

And the membrane on the bottom is also a vapor barrier. The goal of vapor barrier strategies is to prevent moisture from collecting and corrupting building materials. All of our vapour control layers also known as vapour control barriers help to prevent any passage of water vapour into the structure of a building. In fact it is almost a perfect vapor barrier.

A roof design that includes an adhered roof membrane with multiple layers of insulation with board joints offset and staggered over a vapor retarder air barrier helps lower the risk that air and the moisture it carries will infiltrate the roof system. That reduction of air and moisture infiltration can then help improve roof longevity.