Irex 40, Torch-Applied or Type IV Asphalt

Irex 16-9 2
Irex 40

Irex is a high-melt, glass mat-reinforced modified asphalt sheet used as the first ply of Veral composite. When applied in approved Type IV asphalt or by torching, it is lapped 3 inches (7.6 cm) side and end; in nailable applications, it is lapped 4 inches (10.2 cm) side and end and mechanically fastened according to Siplast requirements. Irex is approved by FM Approvals (FM Standard 4470) for use in Veral Class 1 insulated steel roof deck constructions and insulated and non-insulated concrete roof deck constructions, subject to FM conditions and limitations.

  • Designed for use in multi-layer modified bitumen roof systems.
  • Available with Siplast RoofTag RFID.

Irex 40

Consists of a lightweight random fibrous glass mat impregnated and coated with a speciality formulated SBS-modified bitumen. Designed to be applied over approved substrates by torching, nailing, or in approved Type IV asphalt.
Veral roofing on convention center

Veral Roofing Products

Veral sheets are the finish-ply of Siplast Veral roof systems. Used in most roof decks with drainage, they can also be used as a flashing sheet.
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