HydraShell Supreme is a lightweight, easy-to-install 100% synthetic underlayment for steeper slopes under asphalt shingles, synthetic shingles, cedar shakes, and metal. With a unique four-layer construction that makes it 20 times stronger than #30 felt, HydraShell Supreme delivers superior lay-flat properties, won’t wrinkle or absorb water, and stays flexible in cold weather. HydraShell Supreme has a Class A fire rating and is backed by a limited lifetime warranty.
HydraShell Supreme delivers superior performance for home- and building owners, while offering easy installation for contractors. Each 10 square roll weighs less than 26 pounds and attaches with standard roof nails, making the installation simple, fast, and inexpensive. With its nonwoven walking surface and specially formulated, low-slip, bottom-side coating, installation is safer as well.
Warranty: Limited Lifetime
UV Exposure: 90 days
Color: Cool gray
Roll Dimensions: 40”x 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
Temperature Range (Internal): -70°F to 240°F
HydraShell Supreme is lighter than felt, so its easier to handle. It comes 10 squares to a roll, offering more coverage per roll and is pre-printed with a nailing pattern for easier installation.
Calculate the exact amount of ventilation needed for a well-balanced system.
