Underlayment & Barriers

Protect your home or building with underlayment and water-resistant but vapor permeable barriers. Building underlayment is usually used when working on roofs and external walls to provide a barrier on the inside of the construction work in case your house siding is not water-tight or your roof tiles are not moisture resistant. 

Our range of building underlayment includes specialty insulated or woven reinforced vapor barriers for crawl spaces and smaller areas especially common in roof and attic construction work. As well as specialty synthetic roofing underlayment to protect the construction of the roof and keep moisture, vapors, and any weather damage to the roof tiles out of the structure.

For underlayment and barrier insulation and reinforcement for walls and sheds take a look at our selection of poly sheeting, underslab vapor barriers, as well as pipe boot and patch. Flashing, adhesives, and sealants are also available to stock up on accessories and must-have products to complete the job. You will find underlayment and barrier brands that have become house names such as Viper, Aluf Plastics, and our very own Roofing4US. 

Browse below to find underlayment or vapor barrier products for your project and contact one of our team members via Live Chat if you have any questions about the products or which underlayment to choose for your specific project.