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Roof Underlayments

Roof Underlayments - October 2018

Roof underlayments featured in Metal Architecture's October 2018 issue.

Atlas Roofing’s FR-10 and FR-50 Slipsheets enhance overall fire performance of many roof systems including metal roofs. They protect against flame spread and flame penetration through the roof system. FR-10 and FR-50 are coated-glass fiber mats designed for installation over wood decks or polystyrene insulation. FR-50 incorporates a heavier glass mat than FR-10 to provide enhanced fire performance. The slipsheets can also act as barriers between chemically incompatible insulation and roof membranes. Slipsheets can be installed with multiple layers to attain Class A fire resistance ratings.

Carlisle WIP Products’ WIP 300HT is a high tensile-strength, self-adhering, rubberized asphalt underlayment. It works with multiple metal roofing materials including copper, zinc and Corten. It may also be used under synthetic, concrete and clay tiles, and asphalt shingles. WIP 300HT roof underlayment provides protection from water penetration caused by wind-driven rain and ice dams, and is designed to withstand temperatures up to 250 F (121 C). The strong, skid-resistant membrane is available in black or white.

Englert’s Metalman HT–40 underlayment is a 40-mil, self-adhesive waterproofing membrane composed of SBS-modified bitumen and an ultraviolet (UV) anti-slip polyethylene woven top facer. The roof underlayment’s release film backing is UV resistant and protects it from degradation when exposed to the elements for less than 90 days prior to roofing material installation. Metalman HT-40 meets Florida Building Code FL 11351.1 and Miami-Dade Product Control Approved NOA #08-225.10.

IMETCO’s AquaBlock roof underlayment is a self-adhering, SBS-modified membrane for metal roof panels, metal shingles and metal tiles. The self-sealing roof underlayment has a silicone-treated, split-back release film for installation and can be installed directly to concrete, plywood, wood composition board and gypsum. AquaBlock is designed to protect against water infiltration due to ice and snow accumulation at penetrations, valleys and edges on sloped roofs.

MFM Building Products’ Wind and Water Seal underlayment is high temperature rated to 250 F. It works well under metal roofing systems, and is self-adhering and self-sealing around fasteners. The 40-mil thick roof underlayment may be used as a whole roof covering to offer secondary water protection. Rolls are 36 inches by 67 feet (200 square feet).