Fastening DensDeck Roof Boards
What is the best way to fasten densdeck through 4″ rigid foam on 1:12 roof with adhered TPO? My roofer is concerned the traditional screws and washers on top of the densdeck will be visible and a wear point under the TPO membrane.
The existing roof is a 1:12 gable roof with 1/2″ plywood decking. We’re going to ice and water the entire roof. Adhered ice and water seems to be the cheapest air barrier. Over that, two 2″ layers of polyiso then the densdeck and fully adhered 60-mil TPO.
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