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Community and Q&A

Dimple board on a pre-cast concrete basement

Andy Spears | Posted in Green Building Techniques on

I just had a pre-cast basement installed that uses 8000 psi concrete. The majority of the basement is below grade. They told me that I don’t have to do any type of water proofing, but since I haven’t back-filled yet, I’m going to go ahead and do it anyways for peace of mind. I like the idea of the dimple board membrane except for the fact that you have to nail it into the wall. I don’t want to create holes in a wall that is solid! Any ideas if I can install the dimple board without nails?

Thanks in advance!

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Replies

  1. Steve Knapp CZ 3A Georgia | | #1

    Be sure to read the terms of your precast warranty. Make sure adding exterior waterproofing won't void your warranty.

  2. Andy Spears | | #2

    Not sure about driving nails into the wall (which I don't want to do anyways), but applying a water proofing membrane won't void the warranty

  3. C. B. | | #3

    Andy, besides sheet products, I'd recommend considering:
    http://www.decoproducts.com/deco-20-seal/
    I used it on my forever home which is certified LEED Gold.

  4. User avatar GBA Editor
    Martin Holladay | | #4

    Andy,
    I don't think that nails will hurt your concrete foundation. But why not call up the manufacturer and ask about their recommendations and warranty terms?

  5. Steve Knapp CZ 3A Georgia | | #5

    @Andy. I can understand your anxiety about the basement system. (I installed two footer drains since there was no consensus about optimal placement.) Maybe this inspection page would be helpful: http://inspectapedia.com/structure/Pre_Cast_Concrete_Foundations.php. It at least provides some guidance on things to observe that might suggest installation problems.

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