GAP WaterGuard All-Purpose

GAP WaterGuard All-Purpose Synthetic Roofing Underlayment is a polypropylene, two-side coated woven fabric containing a patented slip resistant surface (U.S. Patent # 7745353) and is used as a secondary roofing protection, mechanically attached to the roof sheathing under the primary roofing material.
WATERGUARD_LOGO-FINAL-Recovered
    Product Use

    Polypropylene woven scrim (UV stabilized), 1.2 mil/1.0 mil average coating weight (beige top/grey bottom), total weight 3.6 oz./yd2 (122 g/m2) +/- 5%, and an overall thickness of 8 mil (ASTM D1777). Rolls have a 2” core, 48” (width) x 250’ (length) and weigh approximately 25 lb. per roll.

    Material Performance

    Mullen Burst (ASTM D3786)
    • 215 psi (1481 kPa)

    Slip Resistance (Tribometer)

    • >1
    Grab Tensile (ASTM D5034)
    • MD 140 lb. (620 N) / CD 125 lb. (555 N)
    Strip Tensile (ASTM D5035) – N/5cm
    • MD 90 lb. (800 N) / CD 80 lb. (701 N)
    Tensile Elongation (ASTM D5035)
    • MD 24% / CD 21%

    Tongue Tear (ASTM D2261)

    • MD 35 lb. (155 N) / CD 35 lb. (155 N)

    Trapezoidal Tear (ASTM 4533)

    • MD 40 lb. (177 N) / CD 30 lb. (133 N)

    Moisture Vapor Transmission (ASTM E96)

    • 0.04 perms (0.30 g/day-m2)

    Pliability (ASTM D146)

    • Pass (no cracking)

    Water Ponding (CAN/CSA A220.1)

    • Pass (no dripping)

    Low Temperature Flexibility (ASTM D1970)

    • Pass (no cracking, 5ᴼ F / -15ᴼ C)

    Puncture (T 803)

    • 4.7 joules

    UV Weathering

    • 6 months (UV Stabilized)

    Class A Fire Rating (ASTM E108)

    • Pass

    Florida Building Code Approved

    • FL 6645

    ICC-ES Acceptance for Roof Underlayment (AC 188)

    • ESR-2185

    Hail Resistance Rating (UL 2218)

    • Pass

    Impact Resistance (ASTM D1709)

    • Pass

    Roofing Underlayments (ASTM D226)

    • Pass

    Government Specifications

    Florida Building Code Approved

    • FL 6645

    ICC-ES Acceptance for Roof Underlayment (AC 188)

    • ESR-2185

    Documents

    Download Printable Documents

    Manufacturing Locations

    Pryor, OK | McGregor, TX | Shafter, CA