Roof underlayments featured in Metal Architecture’s October 2019 issue.
Boral Roofing LLC
Boral’s MetalSeal is a high-temperature, self-adhered underlayment. It is designed for metal roofing and is also suitable for any roof material in any climate. The waterproofing material provides all-season, durable protection by bonding to the base sheet or directly to the roof deck, and self-sealing around fastener penetrations. MetalSeal provides a high-strength, woven polyester surface, meets or exceeds all national and Florida building code requirements, and is rated to 260 F. It comes in 216-square-foot rolls for a net two squares.
The Garland Co. Inc.
Garland’s R-Mer Seal is a self-adhering, high-temperature, metal roof underlayment and vapor barrier. Its rubberized asphalt adhesive forms a flexible, watertight seal. R-Mer Seal works on slopes 2:12 and higher. It has elongation capability and tensile strength to accommodate roof surface expansion and contraction. Cross-laminated polymer film provides a non-slip surface for installers.
www.garlandco.com/products/roll-goods/r-mer-seal
Henry Co.
Henry’s Blueskin PE200HT is a self-adhered roofing underlayment consisting of a high softening point, SBS-rubberized asphalt compound, which is integrally laminated to a blue, cross-laminated polyolefin film with slip-resistant coating. It adheres directly to roof decks or certain insulation panels prior to the application of finished roof coverings including architectural metal, shingles and tile. Its main function is to serve as a full-coverage waterproofing layer in the composition of architectural metal roof assemblies.
McElroy Metal Inc.
McElroy’s HydraShell MAX and HydraShell Supreme SA are synthetic underlayments. HydraShell MAX has a four-layer construction and is used under all types of finished roofing materials including steel roofing. It is suitable for roof pitches as low as 1/2:12. HydraShell MAX requires few fasteners and provides a durable deck cover. HydraShell Supreme SA is a peel-and-stick underlayment. It works in high-temperature, self-adhering applications. It has SBS-modified asphalt that provides pliability and a cool gray surface that reduces heat buildup.
MFM Building Products Corp.
MFM’s Premium HT Tile and Metal high-temperature, self-adhering roof underlayment is composed of reinforced polyester fabric laminated to a high-temperature asphalt adhesive system. It has a fiberglass-reinforced core for durability. Additionally, the roof underlayment has a 3-inch selvedge edge to ensure a secure, monolithic seal. Premium HT Tile and Metal underlayment withstands high temperatures and has a high temperature rating of 250 F. The top surface bonds with foam adhesive systems and works with nail-down tile roofs.
Polyglass USA Inc.
Polyglass’ Polystick MU-X is a self-adhered waterproofing underlayment that is a secondary water barrier for various roof coverings including metal. It works in high-temperature environments on steep-slope structures. Polystick MU-X has black film and is applied to plywood or similar decking. It is walkable and does not bleed through.
VaproShield LLC
VaproShield’s SlopeShield Plus is a self-adhered vapor permeable roof underlayment for steep slopes of 2:12 or greater pitch. It features Vapor Permeable Polymer Composite Technology (VPPCT), a combination of polymer coatings and adhesive that makes the underlayment watertight, vapor permeable, and able to withstand foot traffic and UV light.
