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Old 07-23-2021, 06:36 PM   #4
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It is extremely sticky and adheres to the roof surface extremely well. I have tried other membranes and they failed with ice dams, etc. I had a branch go though the roof after Grace underlayment material and new shingles. Trying to take the Grace off to make a nice repair was difficult, as peeling it off actually pulled some of the plywood fibers. And the Grace actually sealed around the branch because of the material it is made of.

Drive down the road and look at new expensive homes being built...I think you will see Grace.
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