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Community and Q&A

ICF & Dimple Drain Board

Ted Cummings | Posted in Energy Efficiency and Durability on

My contractor has a concern that the dimples on Dimple Drain Board will gradually press themselves into the foam of ICF and eliminate the drain space ( due to the pressure of the backfill). I contend that the pressures of the backfill are not so great, or that the resistance of the foam of the ICF is sufficient, or both, that the dimples will never press so far into the foam as to make the drain space ineffective.
Please comment.

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  1. GBA Editor
    Martin Holladay | | #1

    I'm just guessing, but I think your instinct is correct, and that your contractor's worry is baseless. That said, I urge you to contact the technical help department of the ICF manufacturer to get their advice.

  2. Charlie Sullivan | | #2

    What you do might also depend on the soil type, which would affect the pressure against the ICF, and affect the degree to which you are relying on the drainboard vs. drainage through the soil. Backfilling with free draining material is always a good idea, as I learned the hard way.

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