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ICF and frost protected shallow foundation R-value requirements

pietrasm5 | Posted in General Questions on

Does anyone know if both layers of EPS (exterior/interior) count towards the required R-value in a FPSF. In particular, the vertical R-value needed. Or, is it just the thickness of the exterior portion of the ICF foam that counts.

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  1. BirchwoodBill | | #1

    The Builders Revised Guide for FPSF PDF does not address using an ICF block explicitly. I used the external insulation then added an energy stick to the form - as my height was in the 24 inch range. (Detailed method).

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