Flat roof membrane types
I’m looking for advice on the best type of flat roof membrane. I’m currently getting estimates to have a new one put on, with estimates for TPO, EPDM, and fibertite. The roof has ponding issues so I’m also going to have that corrected with tapered foam insulation. I live in zone 6A. Thanks for your insights!
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Over the years we tried tar and gravel, Bitumen, EPDM, liquid applied and foam, and to me, TPO is the only way to go. The main things I look for a flat roof material is heat aging, reflectivity and emissivity, UV resistance and puncture resistance. You could also add easy installation, reduction of energy costs and heat-island effect. Look for heat-welded seams, as they provide superior seam strength to taped seams. Look for a product with 30-35 years min. warranties.
Our designs cover CZ2-5, mainly in the South (more rain) and SW (more sun), so you could take it for what is worth. I've never used PVC or FiberTite, so I can't comment on that.