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G.A.P. WaterGuard™️ All-Purpose Synthetic Underlayment
Brand: G.A.P. Roofing, IncG.A.P. WaterGuard™️ All-Purpose Synthetic Roofing Underlayment is a polypropylene, two-side coated woven fabric containing a patented slip resistant surface (U.S. Patent # 7745353).
This product is used as a secondary roofing protection, mechanically attached to the roof sheathing under the primary roofing material.
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.
Specifications
Brand
Rolls Per Pallet
- 42
Pallets Per Truck
- 38
Weight
- 25 lbs
Size
- 48” x 250'
Thickness
- 8 mils
Coverage
- 1000 SF
Mullen Burst (ASTM D-3786-01)
- 215 psi (1481 kPa)
Slip Resistance (ASTM 1679)
- > 1 (Tribometer)
Grab Tensile (ASTM D-5034-09)
- MD 140 lb (620 N) / CD 125 lb (555 N)
Strip Tensile (ASTM D-5035-11) – N/5cm
- MD 90 lb (800 N) / CD 125 lb (701 N)
Tensile Elongation (ASTM D-5035-11)
- MD 24 % / CD 21 %
Tongue Tear (ASTM D-2261.07a)
- MD 35 lb (155 N) / CD 35 lb (155 N)
Trapezoidal Tear (ASTM 4533-04)
- MD 40 lb (177 N) / CD 30 lb (133 N)
Moisture Vapor Transmission (ASTM E-96-00)
- 0.04 perms (0.30 g/day-m2)
Pliability (ASTM D-146-04)
- Pass (no cracking)
Water Ponding (CAN/CSA A220.1)
- Pass (no dripping)
Low Temperature Flexibility (ASTM D-1970-01)
- Pass (no cracking, 5ᴼ F / -15ᴼ C)
Operating Temperature Rating
- -40ᴼ F (-40ᴼ C) to 240ᴼ F (115ᴼ C)
Puncture (T 803)
- 4.7 joules
UV Weathering
- 80 % of strength after 6 months (UV Stabilized)
Class A Fire Rating (ASTM E-108.2007)
- 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 D-1709)
- Pass
Roofing Underlayments (ASTM D-226)
- Pass