Seeing a fast uptick in PMR builds aimed at making the roof earn its keep. Last month we converted a 24,500 sq ft office roof in Phoenix to a 60 mil PVC-based PMR with 3" XPS, geotextile, PMMA flashings, and pedestal pavers to carve out seating zones around a PV array, and it’s meeting ASCE 7–22 edge-zone pressures. Who else is getting owner buy-in on this combo, and how are you handling wind-uplift and overflow drainage at the parapets?
7–22 edge-zone pressures. Who else is getting owner buy-in on this combo, and how are you handling wind-uplift and overflow We’ve had easiest owner buy-in using 3 cm pavers just in corner/edge zones with stainless wind clips plus a continuous perimeter cleat over the geotextile, and we kerf-notch the first pedestal course to give water a clean path to the overflow scuppers. Small caveat: where parapets are under 12", we add hidden paver tie-downs or the clips chatter in gusts.
My take: I’d lean toward the simplest next step and see if it changes anything this week — if not, you’ve got a clear case to escalate. What would block you from trying that?
But quick example: on an 18k sf Denver job we calmed uplift by bumping paver weight in corners (2.25" units) with wind discs and a continuous perimeter restraint; a 10–12" parapet did more than any spreadsheet. For overflow, we added membrane-level secondary scuppers and a couple of marked ‘access tiles’ over each drain so crews can clear strainers fast. Small caveat on PVC — drop a slip sheet/protection board under pedestals or you’ll telegraph dimples in summer, @tony_r99.