Vapour Barrier

Vapour Barrier Installation in the GTA

Vapour barriers exist to prevent water vapour from diffusing into building insulation. This prevents moisture from accumulating and causing structural damage.

Correctly installed, a vapour barrier helps to keep vapour out, as well as allow it to escape if it enters a building envelope.

Vapour barriers usually come in the form of clear polyethylene sheets.

Considerations for installing Vapour Barriers

Building code requires that vapour barriers are required for insulation in walls, floors and, ceilings. Vapour barriers are commonly installed on the dew point’s warm side. In today’s common 7-layer wall assembly, vapour barriers must be installed as the sixth layer.

One Alliance technicians can determine if your vapour barrier systems are sufficiently protecting your home.