HydraShell Premium underlayment is among the safest, strongest, and best-performing solutions on the market. It is both lighter and stronger than Type 15 or 30 felt and is easier to handle during installation. HydraShell Premium won’t buckle, warp, or crack, and it is backed by a limited lifetime warranty.
HydraShell Premium is rated for commercial and residential applications using plastic caps and roofing nails (3/8” head) and is an ideal roof underlayment for asphalt shingles, metal, tile, slate, and a variety of other sloped roofing materials. Its skid-resistant polymer coating and proprietary Fiber Claw™ walking surface offer dynamic steep-slope traction for easier installation in a variety of weather conditions.
Warranty: Limited Lifetime
Tensile Strength (ASTM D882): 126 lbs MD/92 lbs CD
Tear Resistance (ASTM D4533): 41 lbs MD/37 lbs CD
Rupture Resistance (ASTM D3462-02): 87 LBF
Beach Puncture (ICC AC-08): Pass
Long-Term Sag (ICC AC-08): Pass
Liquid Water Transmission (ASTM D4869-02): Pass
Ultra Violet Aging (ICC-ES AC 188): Pass
Accelerated Aging (ICC-ES AC 188): Pass
Calculate the exact amount of ventilation needed for a well-balanced system.
