Roofing felt, also referred to as tar paper or underlayment, plays a vital role in roofing construction by acting as a protective barrier between the roof deck and the final roofing material, such as shingles. Typically composed of a base material like fiberglass or organic cellulose fibers, roofing felt is saturated with asphalt or bitumen to render it waterproof. This combination of materials effectively shields the roof deck from water penetration, safeguarding the underlying structure from potential damage.

During installation, roofing felt is layered atop the roof deck in overlapping fashion before the final roofing material is applied. This method creates a robust barrier against water infiltration, wind-driven rain, and other environmental factors, thereby extending the lifespan of the roof and preventing leaks. Ensuring proper installation techniques is essential to maximize the effectiveness of roofing felt in safeguarding the integrity of the roof structure.

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