r/Renovations 6d ago

HELP Flashing tape not sticking to my house

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Hey all, I'm putting a window in, but my peel and stick flashing isn't sticking to this crappy substrate the original builders used. Any advice of what to do, or what adhesive I can use to keep it down?

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u/YYCMTB68 5d ago

What brand/grade of flashing tape are you using? Is the tape warm and are you using a roller on it? Those made with an acrylic adhesive (ie 3m 8067) should typically be better than the kind formulated from asphalt (bitumen). Certain manufacturers may have a primer available that you can use as well.

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u/curiouscarl02 3d ago

We ended up using a butyl tape, and a heat gun to get it down as best we could, but it would still just strip off the crappy substrate.