WinterGuard Granular Waterproofing Shingle Underlayment, 2 SQ Roll

Self-adhering, granular waterproofing underlayment engineered to stop water intrusion at roof eaves, valleys, and other vulnerable areas. Made from vapor-tight asphalt polymers that stretch and seal around fasteners for a durable, long-lasting barrier.

Key Features:

• Self-Adhered Waterproofing: Asphalt-polymer composite forms a vapor-tight, elastic seal that self-seals around nails.
• Granular Surface: Provides traction and durability for easier installation and service life.
• Cold-Weather Defense: Designed for eaves and valleys to combat ice dams and wind-driven rain.
• Generous Coverage: 3' x 65' roll covers 195 sq ft (2 squares) for efficient roof prep.
• Code-Compliant: Meets ASTM D1970; Miami-Dade and Florida approvals; UL 790 classified under Class A/B/C systems; ICC ESR-1492; CSA A123.22.

Specifications Table:

Frequently Asked Questions (FAQ):

Q: Is this product self-adhering?
A: Yes, it is a self-adhered underlayment with an asphalt-polymer adhesive that bonds to the deck and self-seals around fasteners.

Q: What is the roll size and coverage?
A: Each roll is 3 feet wide by 65 feet long and covers 195 square feet (2 squares).

Q: Where should I install WinterGuard?
A: Install at roof eaves, valleys, dormers, and other leak-prone areas; extend at least 24 inches past the interior wall line at the eave where required.

Q: What warranties apply?
A: Product lists a Lifetime Limited Warranty; see manufacturer documentation for terms and conditions.

Q: Is it approved for use under fire-rated shingle systems?
A: Yes, it is UL 790 classified for use beneath Class A, B, or C fire-rated shingle systems.

A Seamless Shield for Elegant Rooflines

WinterGuard wraps the roof in a sleek, protective layer that preserves the clean geometry of eaves and valleys. Its granular finish adds a refined texture while the self-sealing technology keeps the envelope pristine through harsh seasons. Pair it with architectural shingles to accentuate shadow lines and ensure a crisp silhouette. This underlayment is a quiet essential for luxurious, weather-resilient living.

Protect your roof’s most vulnerable areas—choose WinterGuard Granular for reliable, code-compliant waterproofing that lasts.