Forum Discussion
oldbeek
Feb 22, 2012Explorer
x4 for edpm. I not only took off the AC, I built up the perimeter of the 14 inch square hole by 5/8 inch. I pulled the staples that secure the rubber roof around the hole and gently lifted the rubber about 3 inches back from the edge of the hole. I used 5/8 x 3 in stock, tapered it at a 60 degree angle. Resulting in 5/8 x 1 inch riser tapering down to 0 at 3 inches. I fabricated this material all the way around the hole using contact glue and staples. I then reattached the rubber roof over the new riser around the hole using contact cement. Then I applied the EDPM to the entire roof. I was told by EDPM techs that the EDPM would not adhere well to the slick white topping on the endurabond tape. They recommended to apply contact cement to the endurabond to make it tacky. Also where I overlapped the front and rear cap by 1/2 inch to scuff the trim and fiberglass with 50 grit paper to increase adhesion.
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