About RUBEROID® HW 25 Smooth Membrane

RUBEROID® HW 25 Smooth is a tough, resilient modified bitumen membrane manufactured to stringent GAF specifications. Its core is a strong, resilient non-woven glass mat that is coated with flexible, polymer-modified asphalt.

  • System guarantees are available for up to 20 years1
  • Available as a smooth surface

1See applicable warranty or guarantee for complete coverage and restrictions.

Features & benefits

Product Documentation

View All Documents
RUBEROID® HW 25 Smooth Membrane

SBS, APP & BUR roof system product comparisons

Any discussion on asphaltic roofing will involve one or more of these three terms: SBS (Styrene-Butadiene-Styrene), APP (Atactic Polypropylene), and BUR (Built-up roofing). SBS and APP are polymers with unique characteristics, and membranes made with them are classified by ASTM numbers, types and grades. BUR is an assembly method in which multiple layers of felts are installed with hot asphalt in-between.
RUBEROID® HW 25 Smooth Membrane

Membrane Base & Cap Sheet Surfacing Options

Asphaltic base and cap sheets come in a wide range of surfacing options — including silica, talcum powder, polyolefin burn-off film, standard and bright white granules, embossed aluminum film, and more — to help accommodate your installation methods and meet your durability and reflectivity expectations.
Asphaltic Roofing 101 Playlist from GAF Commercial

Asphaltic Commercial Roofing 101

Proven historical performance. Time tested durability. Asphaltic roofing products are a go-to material of choice for high end low-slope buildings. Learn more about asphaltic technologies and application techniques, as well as how to decide if asphaltic is the right roofing solution for your next project.
See complete playlist
The new GAF roof system on the Mosaic Ultra Urban Living Apartments, one of Dallas' most-stricking high-rise residential communties.

Real projects featuring asphaltic solutions

The Mosaic project involved the 2007 renovation of the former Fidelity Union Bank and Insurance complex, two vacant downtown Dallas office towers. Mosaic is one of Dallas’ most striking high-rise residential communities.
Learn about project

Related products

GAF Commercial brochure showing commercial roofing systems

Commercial roofing products: solutions for every roofing needs

From single-ply membranes to full system solutions, and state-of-the-art digital services to hands-on training. GAF other the range of durable, easy-to-use products and services you need to succeed.
Download Catalog

Resources for every professional

Contractor working on a commercial roof

Contractors

We’re building new plants for greater capacity, and better systems for faster response and greater visibility.
Contractor Resources
An architect drafting blueprints

Architects & Design Pros

We’re building better, faster, more accurate access to the information you need.
Design Resources
A commercial storage facility

Property managers & owners

Whether you manage one property or many, we’re building the products and programs you need to reroof, restore, or maintain your investment.
Building Resources
GAF employee outside flatbed truck with shingles

Roofing suppliers

Find tools, documents, and training designed by GAF to help you serve your customers.
Dealer Resources