Stego Vapour Barrier - Concrete Curling and Warping: The Hard Facts

Forget what you've been told about vapor barriers leading to increased curling of your concrete slab. While protecting your foundation with a high-performance membrane will contribute slightly to the problem in the short-term, installing a vapor barrier is critical to prevent long-term warping of the slab by eliminating water vapor diffusion from the subsurface, a much more difficult and costly problem to fix.

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