Easy-to-install underlayment products for steep-slope roofs.

The key to a reliable, well-protected steep-slope roofing system is its underlayment. At Polyglass, we lead the industry with our selection of self-adhered roofing underlayment products to meet every steep-slope roofing situation and challenge.

Equipped with revolutionary ADESO® self-adhered technology, Polystick roof underlayments not only provide your customers with the most advanced and time-tested roofing technology on the market — they also save contractors time and money on installation cost.

  • Safe and easy installation
  • Independently-tested and certified
  • Warranties up to 30 years
  • Watertight protection

Learn more about our self-adhered roofing underlayment products below.

The benefits of self-adhered underlayment

When deciding on what roof assembly to install, a quality roof underlayment can play a critical role in the performance of the roof system. With Polystick underlayments, you can build your business with long-term satisfied clients while enjoying reduced installation costs and fewer callbacks.

Let’s take a look at the benefits of Polystick self-adhered underlayments.

Watertight protection

Thanks to enhanced lap sealing, our dual-compound self-adhered underlayments offer unmatched waterproofing across a wide range of roofing applications.

Safe and easy installation.

Polystick underlayments feature patented ADESO® self-adhered technology. Most ADESO membranes feature SEALLap®, a patented factory-applied adhesive treatment along the side of the membrane. Polyglass’ self-adhered granulated cap sheets also feature FASTLap®, a patented granule-free end lap. Both SEALLap and FASTLap are protected by a removable film for easy installation.

Independently tested and certified.

Polystick roof underlayments meet or exceed a wide range of industry code approvals*, including:

  • ASTM
  • UL Classified
  • ICC-ES
  • Miami Dade County Approved
  • Florida Building Code
  • Texas Department of Insurance

* View Product Data Sheets for product-specific approvals.

Warranty protection for up to 30 years.

We stand behind our products with the most reliable warranties in the industry. Our warranty programs provide extended protection, assuring the optimum system performance is guaranteed. We continue to safeguard our customers’ assets after the installation with our warranty support.

Related Resources

Why Polyglass?

Polyglass® is an ISO 9001:2015 Certified, leading manufacturer of modified bitumen roofing and waterproofing membranes and roof coatings for low- and steep-slope applications. We are an industry leader in self-adhered underlayments that are specially designed to help contractors save time and labor costs.

Utilizing the most technologically advanced manufacturing process in the industry, Polyglass operates six state-of-the-art manufacturing facilities — five in North America and one in Italy that serves all of Europe.

As a company that prides itself in innovative and quality roofing products that exceed the needs and expectations of its customers all around the world, we offer roofing contractors the following benefits:

  • An extensive line of underlayments and other roofing products that allow for custom-designed solutions for unique construction challenges and environmental conditions
  • Outstanding technical support and project assistance
  • The most trusted warranties in the industry
  • A registered contractor program and a wide array of contractor resources, including instructional videos to Polyschool courses.
  • The ability to earn points and redeem prizes for every Polyglass purchase with QRewards

Our team of experts is here to help you choose the best underlayment products for your next project. Get in touch with our team today.

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