Hi roofing experts,
I’m a home owner with an (almost) flat roof (I believe it’s 1/12 grade). We currently have an old tar and gravel top that needs replacing, and we’ve been considering membrane options as well as a straight tar and gravel replacement. I should mention that our house is on the (west) side of a mountain, and is subject to lots of sun, wind, and (in the winter) snow.
We’ve been hearing about Flex (“elvaloy kee” ?) and fibertite membranes, and their main selling points appear to be energy efficiency, ease of maintainence and a “lifetime warranty” (although other posts on this forum indicate that this warranty promise is essentially meaningless).
Most roofers we’ve talked with recommend TPO or Flex, (but one inspector also threw in EPDM). I searched the forum and found some discussions on SPF as well, but nothing about flex).
My question: In general, for a residential flat roof, given that we wouldn’t want to be replacing the roof in a few years, what material (TPO, EPDM, FLex, SPF) provides the best value for money. I understand that much of this depends on the installer skill level, and I’m merely trying to understand the tradeoffs between the various materials (since we’re getting very confused).
I’d appreciate any help you experts can provide.