Uploaded March 2025 | Updated September 2026, 1 hour ago

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Vapor barriers play a crucial role in slab-on-grade assemblies and basement slabs. However, there is considerable debate regarding the function of sub-slab vapor barriers, the significance of holes in the barrier, its placement, and whether it needs to be airtight. In this video, we will cover everything you need to know about sub-slab vapor barriers and debunk a few myths about their role in slab assemblies.

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