EverGuard® TPO Roofing Systems Guarantee Requirements
January 1, 2014
20, 25, 30, and 35 Year Diamond Pledge® NDL System Guarantee Requirements System Attachment Maximum Guarantee Length EverGuard® Extreme™ TPO Membrane EverGuard® TPO Membrane Insulation Requirements 20 Years 50‐80 mils 60‐80 mils Mechanically Attached As required by Current Design Table(s) 25 Years 60‐80 mils 80 mils Minimum of 2 layers of insulation 70‐80 mils n/a Minimum of 2 layers of insulation New Construction and Tear‐Off Only 30 Years New Construction and Tear‐Off Only 20 Years 50‐80 mils 45‐80 mils As required by Current Design Table(s) 25 Years 50‐80 mils 60‐80 mils Minimum of 2 layers of insulation; top layer must be adhered for fully adhered systems 60‐80 mils 80 mils Minimum of 2 layers of insulation; top layer must be adhered for fully adhered systems 80 mils n/a Minimum of 2 layers of insulation; top layer must be an adhered coverboard* for fully adhered systems Fully Adhered RhinoBond & New Construction and Tear‐Off Only Ballasted 30 Years New Construction and Tear‐Off Only 35 Years New Construction and Tear‐Off Only Additional Requirements Building Height Limitations Buildings greater than 100’ in height must have a minimum 3’ parapet wall to be eligible for an extended length Diamond Pledge™ guarantee. Note: Ballasted roofing systems may not exceed 100’ in height. 
Air Barriers Seams 
An air barrier is required where large wall openings greater than 25% of a total wall area can be open during a wind storm, including opening due to storm damage. An air barrier is required for mechanically attached systems using 10’ wide sheets when installed with side lap attachment that exceeds 6” o.c. Seams of the TPO membrane must be made using a robotic welder in the field of the roof, obtaining a minimum 1 ½” weld. Any hand welds must be a minimum of 2” in width. GardenScapes™ Systems Eligible for the same length of guarantee when all criteria listed above are met. Additional Requirements (continued from previous page) For guarantees greater than 20 years: 
Flashings, Roof Edges, and Flashing Accessories Insulation WellRoof® Guarantee Extension 
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Separate counter flashing or cap flashing is required; exposed termination bars are not acceptable. Use EverGuard® TPO Cover Tape Heat Weld at roof edges. Galvanized‐base metal edging is not acceptable. Regardless of membrane type, EverGuard Extreme® flashing accessories are required. Unsupported EverGuard Extreme® flashing membrane is available and is required on areas where pre‐fabricated accessories cannot be used or are unavailable. GAF EnergyGuard™ insulation must be used in roofing systems to be guaranteed by GAF. Any issued guarantee up to 30 years in length is eligible for the GAF WellRoof® Guarantee Extension; maximum guarantee length, including WellRoof® Guarantee Extension, is 35 years. * Adhered coverboard (e.g., h/d woodfiber or iso, gypsum, etc.) with bottom layer either mechanically attached or adhered, depending on deck and attachment requirements. Specification Plates