Vapour Control Barrier Roof

In fact it is almost a perfect vapor barrier.

Vapour control barrier roof.

The goal of vapor barrier strategies is to prevent moisture from collecting and corrupting building materials. 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. We also stock impermeable air barriers to increase air tightness. And the membrane on the bottom is also a vapor barrier.

The amount of. Vapour control barrier layers about roofing supplies stock supply vapour control barrier layers which are used on warm flat roofs between the decking and insulation to prevent moisture penetrating the insulation layer and compromising it s performance. 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. That reduction of air and moisture infiltration can then help improve roof longevity.