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Professional Roofing



polyisocyanurate; insulation; high-density; ASTM C1289

Polyisocyanurate insulation manufacturers’ faced, high-density polyisocyanurate insulation cover board products have gained popularity and acceptance in the U.S. roofing industry. Differences among some high-density products mean some products are not necessarily interchangeable or, using common specification language, they are not “or equal.”

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