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Community and Q&A

Advice for flat roof installation

girlcab | Posted in Green Products and Materials on

We are having a new roof put on an addition that was originally built in 1919.We are in Southern California. It has to remain flat because several windows look out on to it. I am struggling to find alternatives to the asphalt my contractor wants to use. One of the main reasons I don’t want to use them is the off-gassing and the windows that are right there.
Contractor didn’t like idea of garden roof and I have found so many conflicting opinions about PVC roofs vs. TPO vs. EPDM.
Any help would be so appreciated.

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  1. GBA Editor
    Martin Holladay | | #1

    On small residential jobs, EPDM is the most common of the three types of roofing you mention. But if I had to make a choice, I would ask the roofer about warranties and cost.

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