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Community and Q&A

Reclaimed black fiber-faced polyiso

krom | Posted in General Questions on

I’ve done some searching and haven’t been able to find a recommended tape to use on the seams of reclaimed polyiso with a black fiberglass facing. (at least I assume its fiberglass, it looks/feels, and makes me itch like fiberglass)

Anyone have experience or suggestions?

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  1. Expert Member
    Akos | | #1

    I've had a hard time getting things to stick well to the fiber faced polyiso. 3M tape stick but you can peel it off as it takes some of the fibers with it.

    Best to have your air control layer bellow the polyiso. You can detail the WRB over the foam as a secondary air barrier.

  2. Expert Member
    BILL WICHERS | | #2

    One trick is to run paint a roller over the seam and apply primer. Regular ol’ paint primer. The primer will usually stick to the fiberglass, and the tape sticks to the primer better than to the fiberglass itself. It’s an extra step, and some extra wait time for drying, but it gets the job done.


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