I'm going to be getting into a reno for a customer next week. He's a hands on guy and he'll get the roofer both rubber and asphalt to do the house.
Presently there's an addition on the back of the house that extends 10' ft out, 12' wide. Flat roof, tar & gravel. Its covered by a blue tarp now and sunk in. It runs into the main house that is asphalt shingles. They'll be redone too.
I'll take the top off and go back with 2 x 8 or 2 x 10's and plywood deck.
I may not get the info I need in time to know the slope to put on the roof deck for the epdm ? I suppose any slope is helpful ?
So how much slope ? 10 ft run, is 6" too much, 1" too little ? Like I said it intersects with the 4/12 slope of the existing shingle roof. So that's what (water) will be running down on it.