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Grace Ice & Water Shield Roofing Underlayment

Brand: GCP Applied Technologies Inc

For architects and roofing contractors, roofs are a source of everlasting concern. Seventy percent of all construction litigation is related to leaks, and every leak is a lost opportunity, representing a cost to repair and a corresponding loss of customer trust. Severe weather seems to be the new normal and the risk of damage from ice dams and wind-driven rain are higher than ever. 

Underlayments are the last line of defense in a roofing system, and selection of high quality underlayments can be the difference between success and failure.

Protecting 2 million roofs in 25 countries, GRACE ICE & WATER SHIELD® has protected the roofs of over 2 million homes, and been installed on marquee projects in 25 countries, since its introduction in 1978. 

This high performance solution provides superior performance at an excellent value. GRACE ICE & WATER SHIELD® outperforms the competition, letting contractors shine and keeping families safe and dry.
Features
  • Superior waterproofing protection
  • Embossed surface improves slip resistance
  • Convenient center-lines, lap-lines, and measurement markings
  • Ripcord split release feature makes it easier to apply at vulnerable details
  • Fully adhered roofing underlayment sticks aggressively to deck surface
  • Forms a watertight seal around fasteners used to install shingles and other roof coverings
  • Forms watertight seal at overlaps
  • Protects all standard sloped roofs--slate, tile, shakes or metal, as well as ordinary asphalt shingles

Specifications

Roll Length

  • 75 ft (22.9 m)

Roll Width

  • 36 in (914 mm)

Roll Size

  • 225 ft2 (20.9 m)

Packaging

  • Corrugated cartons

Roll Weight

  • 61.4 lbs (27.9 kg)

Rolls per Pallet

  • 35

Color

  • Gray-black

Thickness, Membrane

  • 40 mil (1.02 mm)
  • ASTM D3767 method A

Tensile Strength, Membrane

  • 250 psi (1720 kN/m)
  • ASTM D412 (Die C modified)

Elongation, Membrane

  • 250%
  • ASTM D412 (Die C modified)

Low Temperature flexibility

  • Unaffected @ -20° F (-29° C)
  • ASTM D1970

Adhesion to Plywood

  • 3.0 lbs/in. width (525 N/m)
  • ASTM D903

Permeance (max)

  • 0.05 Perms (2.9 ng/m s Pa)
  • ASTM E96

Material Weight Installed (max)

  • 0.3 lb/ft (1.3 kg/m)
  • ASTM D461

  • Sloped Roofs and Under Mechanically Attached Roof Coverings
  • Asphalt Shingles
  • Slate
  • Tile
  • Cedar 
  • Standing Seam Metal in Many Climate and Assembly Conditions
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