HydraShell™ Premium

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.

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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.

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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

How To Install

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Step 1

Lay out horizontally on the eave, printed side up, with minimum 4” horizontal laps and 6” vertical laps.

Step 2

Fasten with corrosive-resistant roofing nails with a minimum head diameter of 3/8 inches or plastic capped roofing nails with a minimum plastic cap diameter of 1 inch, according to pre-printed nail pattern.