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Owens Corning Fiberglas Reinforced Felt 35-in x 141.5-ft 400-sq ft Felt Roof Underlayment
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Reinforced with Fiberglass to support flatter, more uniform shingle applications
Helps prevent water infiltration under shingles from wind-driven rain and other sources
Stronger than standard felt - resists tearing when walked on during installation or in strong wind
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