Importance

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Abstract

A three-piece fastener for securing a flexible roofing membrane to a roof without penetrating the membrane. The fastener includes an anchoring disc having a centrally located, upwardly-directed projection or button in the central portion thereof which preferably has a hollow inverted frusto-conical shape. The disc is screwed or nailed to a roof surface, and the roofing membrane laid over the disc. Thereafter, an externally threaded, tined retainer cap of resilient material, which forms a second element of the fastener, is snapped over the button with the membrane located therebetween. An internally threaded cover screws onto the tined retainer, preventing the retainer from popping off the button. The tined cap is lubricated with a permanent non-evaporating lubricant, such as silicon grease, to facilitate its use without damaging the membrane.

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First Claim