Proper underlayment is an essential component for any steep-slope roofing system, providing a secondary line of defense against water infiltration. Henry Eaveguard® Self-Adhered Shingle Underlayment, supplied by A1A Wholesale Supply, is specifically engineered to protect against the most common causes of roof leaks: wind-driven rain and ice damming.
This self-adhering membrane is applied directly to the roof deck, creating a continuous, watertight seal. Its key feature is its ability to self-seal around nails and fasteners, preventing water from migrating through the roof deck. The durable, modified-asphalt composition, reinforced with fiberglass, provides exceptional tear resistance and an extended exposure time, ensuring reliable performance in all seasons. The sand-surfaced top layer offers superior traction, enhancing safety for crews on the roof.
Henry Eaveguard® meets or exceeds the rigorous performance criteria of ASTM D1970 and is compliant with key building codes, including ICC-ESR-1930 and Florida Building Code Approved Product #FL16724. By providing dependable protection and simplifying installation with its split-back release liner and simple roll sizes, Henry Eaveguard® helps contractors ensure the longevity and reliability of their work, reducing callbacks and increasing customer satisfaction.
Key Features and Benefits for Contractors:
- Self-Sealing Technology: Automatically seals around nails and fasteners for lasting watertightness.
- Safety First: Sand-surfaced top layer provides reliable foot grip, making installation safer.
- Easy Installation: Split-back release liner and easy-to-handle roll sizes simplify application.
- Durable & Resilient: Exceptional tear resistance and all-season performance with a UV exposure limit of up to 60 days.
- Code Compliant: Meets or exceeds multiple industry standards and building codes, including ASTM D1970 and Florida Building Code, ensuring peace of mind.
- Protects Against Water Intrusion: Specifically designed to guard against damage from wind-driven rain and ice damming in vulnerable areas.
Basic Uses:
- Providing a secondary waterproof layer at eaves, valleys, rakes, and other vulnerable areas of steep-slope roofs.
- Full deck coverage as a primary underlayment for enhanced protection.
- Sealing roof-to-wall connections, chimneys, skylights, and other penetrations.
Product Specifications:
- Material: 26 gauge G-90 Galvanized ASTM-A653 CS B Galvanized steel
- Compliance: ANSI / UL 441
- Compliance: Meets performance criteria of ASTM D1970, ICC-ESR-1930, ASTM E108 / UL 790 – Class A Fire Resistance, Florida Building Code Approved Product #FL16724, and is TDI Listed.
- Roll Sizes: Available in 1 Square (36″ x 33′), 1.9 Square (36″ x 65′), and 2.25 Square (44″ x 61′).







