Roof underlayments featured in Metal Construction News’ December 2020 issue.
Boral Roofing LLC
Boral Roofing’s Boral Ply 40 is an SBS modified fiberglass reinforced roof underlayment and base sheet for metal tile, shingle or shake roofing. Boral Ply 40’s modified asphalt minimizes the wrinkling and buckling associated with non-modified membranes. The underlayment has an uncovered exposure time, without any degradation, of six months.
CertainTeed Corp.
CertainTeed offers its WinterGuard Metal roof underlayment for metal, shingle, slate or mechanically fastened tile roofs. It is a self-adhering and slip resistant. WinterGuard Metal is unaffected by high temperatures caused by sun exposure during installation or when placed under metal roofing. It comes in rolls of 39 3/8 inches wide by 61 feet long. Coverage area is 200 square feet per roll.
Drexel Metals Inc.
Drexel Metals’ Metshield is a high-temp, synthetic, peel-and-stick roof underlayment. It has a high-tensile strength and is a 40-mil, SBS-modified bitumen with a UV-resistant, anti-slip polyethylene woven top facer. The roof underlayment has a skid-resistant surface and may be used with metal, asphalt and slate shingles and tiles, and a variety of sloped roof materials.
McElroy Metal
McElroy Metal’s HydraShell MAX is a synthetic roof underlayment with four-layer construction. It is used under all types of finished roofing materials including steel roofing. HydraShell MAX is suitable for roof pitches as low as 1/2:12.
MFM Building Products Corp.
MFM Building Products’ Ultra HT Wind and Water Seal is a 45-mil, self-adhering, waterproofing roof underlayment. It is made of a cross-laminated, non-slip polymer film laminated to a high-temperature, rubberized, asphalt adhesive. The roof underlayment comes in a 36-inch-wide, two-square roll.
Polyglass USA Inc.
Polyglass’ Polystick XFR is a self-adhered, fire-resistant roof underlayment. It works in high-temperature applications including steel and copper roofing. The roof underlayment is rated to withstand temperatures to 265 F. It has Burn-Shield technology and provides UL Class A fire ratings for combustible decks. It also has ADESO dual-compound, self-adhered technology with an SBS (elastomeric)-modified bitumen upper compound and self-adhesive compound on the bottom.
