Products / Henry Eaveguard Self-Adhered Roof Underlayment

Nominal 45-mil, sand-surfaced, fiberglass-reinforced, self-adhering SBS modified bitumen roof underlayment. The Florida Product Approval evaluation FL16724 (HVHZ) lists it under the ASTM D1970 material standard with accelerated weathering per ASTM D4798 and TAS 110. In the HVHZ it is listed under asphalt shingles and (as joint strips or valley liner) wood shakes and shingles, not under tile, metal or slate, with a 30-day maximum exposure when the roof cover is mechanically attached.