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Community and Q&A

Fastening House Wrap to Insulated Concrete Form Assembly

JackieTreehorn | Posted in General Questions on

Building an icf house. As with the rest of everything my windows are at least 12 weeks out. I have to wrap the gables (covered in cdx) with housewrap anyway and I figured to get the house starting to dry out I would just wrap the whole thing to keep uv off the foam and the rain out. Just trying to figure the best way to attach it. Only thing I can come up with is taking the plastic cap off of the plastic cap nails and put some sort of exterior screws in its place. Doesn’t sound like much fun.

Another thought would be to somehow tape it in place temporarily while I put some sort of furring strip for a rainscreen which could hold it against the foam.

Any suggestions that sound easier?

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  1. Expert Member
    NICK KEENAN | | #1

    What is your final wall assembly going to look like? Is the housewrap temporary or will it be part of the final assembly?

    1. JackieTreehorn | | #2

      Well it was going to be temp since local inspector doesn’t require it but if I’m going through the effort I might as well leave it on and flash the window openings when I’m ready. Henry makes a 6month uv wrap so that should buy me enough time given it’s heavily shaded and wintertime here.

  2. Expert Member
    NICK KEENAN | | #3

    What kind of siding were you planning over the foam, and how were you planning on attaching it?

    1. JackieTreehorn | | #5

      Hardie lap&panel over rainscreen. Might incorporate a little bit of metal

      1. Expert Member
        NICK KEENAN | | #6

        I would use the rainscreen to hold the housewrap then.

        1. JackieTreehorn | | #7

          Yeah, I was hoping for a quicker install to be able to do rainscreen later but it looks like that's going to be the ticket. Thanks!!

  3. GBA Editor
    Kiley Jacques | | #4

    According to Mike Guertin, the answer here is to follow the IRC: What’s the Building Code for Housewrap Installation?.

  4. plumb_bob | | #8

    Does the IRC have a prescriptive requirement for cladding installation on above grade ICF walls? If so, does it include a second plane of protection (house wrap?)

    I recently contacted an ICF manufacturer regarding the above question, and for hardie type siding on low rise residential construction they say the building needs a rain screen but the house wrap is not necessary. And the battens need to be screwed, not nailed, as the plastic inserts may shatter if nailed.


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