What Is A Vapor Barrier?
A vapor barrier is a thin layer of impermeable polyethylene sheeting that prevents moisture from seeping through your basement or crawl space walls (and floors). This barrier is around 10 to 20 millimeters thick and catches water and moisture seeping through your concrete, channeling it downwards to a connected drain tile system. If you have drywall or paneling on your basement walls, this will protect them from being ruined by mold, moisture, or rot. Note: In order to apply a vapor barrier to a finished basement, we will need to remove any finishes.
A vapor barrier will lower the temperature in your basement or crawl space, reduce humidity, and prevent moisture from damaging stored items, including structural supports such as joists.
When To Use A Vapor Barrier With Insulation
Insulation will prevent air from entering or escaping your basement, but it will not stop moisture diffusion. A vapor barrier will stop moisture diffusion and should be applied directly to your concrete walls (plus crawl space floors). If you decide to add insulation in your basement, it should be applied after you install a vapor barrier.
How Do We Install Vapor Barriers?
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Vapor Barrier FAQs
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