About Tri-Ply® Ply 4

High tensile strength and a high degree of dimensional stability results in a roof system with greater resistance to splitting and cracking. Optimum porosity of the felt provides ready escape of air while allowing proper asphalt penetration at the time of mopping, and the asphalt coating provides a high degree of moisture resistance.

Product Documentation

Video start for APP, SBS, and BUR comparisons by GAF Commercial Roofing

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.
Video start for Asphaltic membrane installation methods by GAF Commercial Roofing

Asphaltic Membrane Installation Methods

One of the many reasons asphaltic roofing remains so popular is the wide variety of installation methods available. Depending on specifications, building characteristics and use cases, asphalt roofs can be hot-mopped, heat-welded/torch-applied, cold-applied (adhered), self-adhered, or mechanically attached. Find more about these techniques.
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.

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