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CertainTeed's most economical, torch-applied APP-modified bitumen base sheet, Flintlastic® APP Base T, is valued for its budget-friendly homogeneity with APP torch-applied cap sheets such as Flintlastic® GTA and Flintlastic® GTA-FR. Many members of the design and specification community prefer multi-layer modified bitumen roof systems constructed with the same polymer-modified material and application methodology for base and/or interply and cap sheets, to optimize stress resistance to the roof system with materials expanding and contracting at the same rate. This 80-mil membrane is manufactured with an extra strength fiberglass reinforcement, offering exceptional strength, dimensional stability and handling. Torch-down roofing technology has only strengthened since first coming on the scene in the 1970’s. CertainTeed modifies roofing asphalt with plasticizing atactic polypropylene (APP) polymers to enhance product toughness, especially in environments with elevated UV exposu...See More

Features & Benefits

Quick Specs
• APP-modified • Fiberglass reinforcement • 97 lbs. • 2 Squares • 2.0 mm (80 mils)
• Meets or exceeds ASTM D6509 • Excellent strength • Improved handling when compared to non-modified asphaltic base sheets such as GlasBase Base Sheet
Why Buy
• Tried and true modified bitumen protection • Quick melt for speedy application • Economical option for strong, homogenous (APP to APP) system when utilizing an APP-modified cap sheet
• Standard asphaltic membrane warranty durations between ten and twenty-five years • Credentialed Contractors can increase warranty durations by 25% with an Integrity Maintenance Agreement • Product and Product/Workmanship options: Limited Warranty on Materials, Integrity Roof System® Limited Warranty, and Integrity Roof System No Dollar Limit (NDL) Limited Warranty Warranty durations are based on a combination of system specification and product selection.

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