Roof Washer
The Roof Washer is a specialized washer used for fastening roofing panels (such as corrugated sheets or skylight panels). Its core function is to provide waterproof sealing. It is typically made of weather-resistant rubber or EPDM combined with a metal backing. When the screw is tightened, the washer compresses, tightly filling the gap between the screw and the roofing material, effectively preventing rainwater ingress and ensuring the long-term dryness and integrity of the roof structure.
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