Vapor retarders play a critical role in protecting buildings from moisture intrusion by controlling vapor diffusion through foundations, slabs, crawl spaces, walls, ceilings, and roofing systems. Selecting the right vapor retarder helps prevent mold growth, structural deterioration, insulation failure, and long-term moisture damage. Vapor barriers—defined as vapor retarders with a permeance of 0.1 perms or less—provide the highest level of moisture protection and are commonly required for under-slab construction, crawl space encapsulation, radon mitigation, and code-compliant building assemblies.

Americover manufactures a full range of American-made vapor retarders and vapor barriers engineered to meet demanding construction and environmental specifications, including ASTM E1745 Class A, B, and C performance standards. Our products are trusted by contractors, builders, remediation professionals, and government agencies who need reliable, spec-ready moisture control solutions for residential, commercial, and federally funded projects. BABA-compliant options are available to support Buy America Build America procurement requirements.

As a flexible alternative to big-box suppliers, Americover offers cut-to-fit panels, full rolls, and mixed-SKU pallet options without large minimum order requirements. With Net-30 terms available for qualified contractors and nationwide shipping, it’s easy to source high-performance vapor retarders for projects of any size—from residential crawl spaces to large-scale infrastructure and commercial construction.

💬 LIVE CHAT with our experts to identify the right vapor retarder for your application and ensure long-term moisture protection and compliance.