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Best possible flat roof material

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1.6K views 7 replies 5 participants last post by  kwikfishron  
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#1 ·
Taking money out of the equation completely, what is the best possible flat roof to use on a 100 year-old rowhouse in the North East (Philly).

The roof currently has 4 or 5 layers of modified bitumen torch-down roofing. I am putting a roof-deck on and I really don't want hassle with the roof underneath the deck. My roofer suggested just putting more layers of torch-down on top, but that doesn't sound right to me.

I'm looking for something a bit better: TPO? PVC? EPDM? Raised seam metal? Something else? Presumably I should have the current roof torn off down to the decking, then new OSB or plywood laid?

Thoughts / opinions?
 
Discussion starter · #5 ·
Is what you're talking about the same as EPDM? Most of the new construction around here seems to use a TPO-style roof.

Good idea about accessibility... maybe lift-up / removable panels would be a good idea, especially at the back of the deck near the drain?

I'm planning on spanning the supporting walls, so none of the load of the deck will be on the roof decking or joists.

Thanks for the reply.
 
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