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Do You Need Vapor Barrier With Spray Foam? [Solved]
Home » FAQs » Do I need a vapor barrier with spray foam insulation? Usually no. Closed cell foam is a vapor barrier. Open cell foam is a vapor retarder, but its moisture permeability properties in our climate are sufficient for most structures.
Does Spray Foam Insulation Need A Vapor Barrier?
This is a very serious question and one that can be answered easily for each product: Open & Closed Cell
Can You Use Spray Foam to Attach Vapor Barrier? | Crawl Space Insulation
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Do you need a Vapor Barrier or Vapor Retarder?
In this video,