48" HydraShell Premium Underlayment - 250 ft. Roll

48" HydraShell Premium - High-Performance Synthetic Roof Underlayment

HydraShell™ Premium is a 100% premium synthetic underlayment that is easy to install, lightweight, and offers a low-slip bottom coating. The unique four-layer construction makes it 20 times stronger than #30 felt. Each 10 square roll weighs less then 26lbs. and is attached with standard roof nails, making the installation simple, less expensive, and fast.

HydraShell has a non-woven walking surface and a specially formulated, low-slip, bottom-side coating offering a safer installation process. Backed by a limited lifetime warranty, it is designed for use on steeper slopes under all types of roofing materials including asphalt shingles, synthetic shingles, cedar shakes, and metal.

The superior synthetic underlayment choice with a limited lifetime warranty.

• Superior lay-flat properties: won’t wrinkle or absorb water
• Stays flexible in cold weather
• 20 times stronger than #30 felt
• Less weight per roll
• Low-slip bottom coating
• Cool Gray surface to reduce heat build-up
• 90-day UV exposure rating
• Class A fire rating
• Use on steeper slopes under asphalt shingles, synthetic shingles, cedar shakes, and metal
• Miami-Dade County Code approved
• Made in the USA

Technical Specifications

Roll Dimensions: 40”/300’
Permeability (ASTM E96): 0.1 perms
Water Transmission (ASTM D4869): Pass
Tear Strength (ASTM D4533): 38 lbs MD/37 lbs CD
Tensile Strength (ASTM D751): 120 lbs MD/115 lbs CD
Burst Strength (ASTM D751): 160 psi
Elongation (ASTM D751): 20%
Weight Per Square (ASTM D5261): 2.46 lbs
Nominal Thickness (ASTM D1777): 7.5 mils
Temp. Range (Internal): -70° F to 240° F