MFM Building Products announces additional Class A fire rating for Ultra HT Wind & Water Seal® in W.U.I. areas

This rating is in addition to previous fire approvals that include UL 790 and ASTM E108/ICC-ES AC188.

MFM Building Products, a manufacturer of a full envelope of waterproofing and weather barrier products for the building industry, recently achieved a listing for the company’s Ultra HT Wind & Water Seal® underlayment from the California State Fire Marshall for use in Wildland Urban Interface (W.U.I.) areas.

W.U.I. is the zone of transition between unoccupied land and human development. It is the line, area or zone where structures and other human development meet or intermingle with undeveloped wildland or vegetative fuels. This area is considered the most critical area of wildfire risk.

Ultra HT is a 45-mil, self-adhered roofing underlayment for use in steep-slope roofing and re-roofing installations. The product features a durable cross-laminated polyethylene top film with a traction coating for excellent walkability. The specially formulated mastic is rated to 250°F for high temperature roofing applications.

Ultra HT has met the standards for use in W.U.I. areas when used in conjunction with Class A asphalt shingles.

• Listing number: 8180-2433:0001
• Category: 8181 Non-Wood Roof Covering/Assemblies
• Approval: Class A listed roof covering assembly according to the applicable requirements in ASTM E108

This rating is in addition to previous fire approvals that include UL 790 and ASTM E108/ICC-ES AC188. The product also carries additional approvals for general roofing which can be found on the company’s website at www.mfmbp.com.