Polyethylene vapour barriers / Green Building & Sustainable Home Renovation Information & Advice

Poly vapour barriers in air conditioned houses can cause mold and rot
Healthy indoor air quality

Why you should never Install air-con in a home with a vapor barrier

...polyethylene vapor barriers in wall assemblies in all but the coldest of climates, or at least change their location within the wall assembly to avoid the possibility of interstitial condensation damaging wall structures.  Moisture-impenetrable vapor barriers work great in winter and, before air conditioning and heavil...

Finished basements can lead to mold and mildew
Basements improvements

Why are basements moldy? How to fix or prevent a moldy basement

...barriers on basement insulation will rot your walls" We put vapour barriers in basement wall assemblies to keep moisture from getting into them, as if they didn't already contain thousands of litres of water. Polyethylene won't keep foundations dry, they are already soaking wet. All it will do is prevent the thousands ...

Basement Design for walls prevents mold & midlew when renovating & finishing
Basement finishing

Basement renovations: How to prevent mold when finishing basements

...vapour barriers in below grade wall assemblies are commonplace, frustrated building scientists insist that installing them is the worst thing you could possibly do down there. Basement renovations demonstrating mold growth in internal stud wall - Image © Ecohome Above is a photo of a basement being repaired after flo...