HydraShell™ WeatherTite HT

Weather-Tite HT is a premium high-temperature self-adhering roofing underlayment engineered for extreme durability and performance. Ideal for metal roofs and asphalt shingles, it features a high-tack, asphalt-based adhesive with a split-release liner for easy installation. The anti-slip textured top surface ensures safe and efficient application, while the robust design provides superior protection against harsh weather, extending roof life and reliability.

Benefits

Leak-Free Protection – Its seamless design helps prevent roof leaks and water intrusion, protecting the home from moisture damage.
Dual-Purpose Venting – Designed to vent both bathroom fans and dryers through the roof, reducing the need for multiple roof penetrations.
Improved Airflow – Helps efficiently remove moisture, heat, lint, and odors from the home.
Built-In Flapper – The flapper helps prevent backdrafts, outside air intrusion, pests, and debris from entering the vent system.
Installation Flexibility – Available with or without an attached collar to fit different installation needs and duct connections.
Cleaner Roof Appearance – The low-profile, seamless construction provides a more finished and professional look on the roof.
Durability – Made to withstand outdoor weather conditions while maintaining reliable performance over time.
Reduced Moisture Problems – Properly exhausting bathroom humidity can help reduce mold, mildew, and condensation buildup inside the home.

VIEW SPECS

Compound Stability (ASTM D36): >125℃ (257℉)

Maximum Load (ASTM D2523): 4.4 KN / m

Elongation at Break (ASTM D2523): 10%

Adhesion to Plywood at 4℃ (ASTM D903): 0.92 kg/30.5 cm

Adhesion to Plywood at 23℃ (ASTM D903): 5.44 kg/30.5 cm

Thermal Stability (ASTM D1204): 3 mm

Flexibility Temperature (ASTM D1970): -29℃ (20℉)

Tear Resistance (ASTM D4073): 89 N

Waterproof Integrity of Lap Seam (ASTM D1970): Pass

Sealability Around Nail (ASTM D7349): Pass

Moisture Vapour Permeance (ASTM E96): 5.7 ng/Pa.S.M²

Slip Resistance (ASTM D1970): Pass

How To Install

Weather-Tite HT features a split-back release film that peels off for easy installation. The clean, easy-to-handle, self-adhering application makes installation quick and efficient.

Step 1

Tack/secure the end of the roll with a nail. Unroll the membrane 3 to 6 feet.

Step 2

Carefully remove the upper release liner, align the membrane, and continue to peel the release liner from the membrane. Stop frequently to press the membrane in place with heavy hand or roller pressure.

Step 3

When finished with the desired length, repeat the process at the starting point by removing the remaining poly release film and pressing the membrane in place with heavy hand or roller pressure. Side laps (horizontal laps) must be a minimum of 3 inches and end laps a minimum of 6 inches.

ADDITIONAL RESOURCES

VENTILATION CALCULATOR

Calculate the exact amount of ventilation needed for a well-balanced system.

TECHNICAL TOOLS

Dive deep into product sheets, diagrams, and full spec breakdowns.

Roofing FAQ

Learn everything you need to know about ventilation.

HydraShell™ WeatherTite HT

Benefits

VIEW SPECS