- Reinforced with fiberglass to support flat, more uniform shingle application
- Unlike standard felt, resists curling or pulling away from fasteners when exposed to moisture or wind
- Increased tear strength to resist tears when walked on or in windy conditions, as compared to standard felt
Fiberglas™ Reinforced Felt Underlayment is part of the Owens Corning® Total Protection Roofing System™§.