Improper use of vapor barriers is one of the leading causes of moisture-related issues in buildings today. Vapor barriers, or vapor retarders, are designed to prevent wall assemblies from getting wet.

The currently accepted rule of thumb is that the vapour barrier may be installed in the first third of the insulation. To clarify, if 12 inches of insulation is to be placed in the attic, the ...

Years ago, when few homes had insulation in their outside walls, no one worried about vapor barriers–there was no need for them. But now homes are better insulated, making it necessary to install a ...