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Community and Q&A

Designing a window connection for ICF

user-731319 | Posted in GBA Pro Help on

I am Building a home with ICF’s. I am looking for a design configuration for the windows where they meet the ICf.
I have 2″ of foam, 8″ of concrete, then 6″ of foam on the inside.

the floor is concrete, and in this situation the window sits on the floor (4″ of concrete on grade) so the floor will be poured though the window opening before the window is installed.

any help is welcome.

Thank you for your time.
Benjamin McCarthy.
[email protected]

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  1. homedesign | | #1

    Why would you want to build a house with ICF?
    Why does the window sit on the floor...on top of a concrete thermal bridge?

  2. GBA Editor
    Martin Holladay | | #2

    You need to contact the ICF manufacturer.

    Most ICF manufacturers provide installation guides that include details for installing window bucks. Here is a sample installation guide from one manufacturer:

  3. jklingel | | #3

    Ben: You get a lot of pros to answer here, but I am not one of them. That said, I'd sure reconsider building w/ ICFs and an extra 6" of foam on the outside. I looked at ICFs for a house long ago, and the cost is simply prohibitive, esp if you want any R value at all. Too, the headaches inside are not appealing; securing electrical outlets, hanging a picture 2 yrs from now, etc. Each of us has his/her set of parameters, though. Good luck. j

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