Irex, Torch-Applied or Type IV Asphalt

Irex roof sheet
Irex 16-9 2

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

High-melt, modified asphalt sheet, random glass mat-reinforced, which is used as the first ply of Veral composite, lapped minimum 3 inches side and end.
Veral roofing on convention center

Veral Roofing Products

Veral sheets are the finish-ply of Siplast Veral roof systems and are preferably applied by torching but can be applied in approved Type IV asphalt. Used in most roof decks with drainage, they can also be used as a flashing sheet.
Learn More