I want to get solar panels and I really do need a new roof. I’m going to go down to the wood because I have some spongy spots and want to take care of that now rather than after.
I’ve been told to use EPDM, TPO, and double layer a torch-down granulated rubber.
As a general product, I’ve been told granulated rubber doesn’t last as long as TPO or EPDM, but that 2 layers should last longer than either and will provide better protection against punctures (like if someone steps on a nail or zombies are crawling onto my roof during my last stand).
I’m in Philadelphia,PA if that helps…