CertainTeed's waterproofing shingle underlayments are applied under roof shingles during new construction or re-roofing to protect your home’s interior from winter leaks caused by ice dams and wind-driven rain.

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PROFELT PLUS® and PROFELT 30® GENERAL - Perma “R” Products synthetic roof underlayments are designed to replace and outperform traditional asphalt felts. ProFelt Plus and ProFelt 30 will not rot, dry out, or support mold growth.

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