Q350 / FQ350 Fanfold Underlayment

GreenGuard Q350_FQ350 Siding Underlayment_US

For use in Replacement Siding Operations to Provide a Level Surface Over Old Siding, Add Insulation and Weather Protection

When every penny counts, you can rely on the performance of our most economical fanfold siding underlayment. The Q-Series products have an extruded polystyrene foam (XPS) core with high-impact polystyrene capsheets on both sides, which make it one of the most durable products currently available. These products are also perforated to allow potentially harmful moisture vapor to escape so that it does not become trapped in the wall.

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GreenGuard Q350_FQ350 Siding Underlayment Product Sheet

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Kingspan Insulation North America

Head Office & Sales Office – North America

Kingspan Insulation LLC

2100 Riveredge Parkway, Suite 175

Atlanta, Georgia



Call: +1(800) 241 4402