GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

Footing to foundation capillary break

Steve Wilson | Posted in Green Building Techniques on

Can a regular exterior latex paint we used for the capillary break between the footing and foundation, if one puts on a couple of coats. This is in a very dry climate, and the likelihood of any foundation water is almost non-existent. This is merely an extra added precaution. Footing poured today so we have the weekend to paint 🙂

Thank you!

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.

Replies

  1. Expert Member
    Dana Dorsett | | #1

    Exterior latex paint is not a capillary break. A latex based waterproofer such as UGL Drylok can work, as do any of a number of asphalt based foundation waterproofers.

    EPDM membrane works as well or better than any mop-on goop solution.

  2. Steve Wilson | | #2

    Thanks Dana. In a separate thread on this topic, a latex elastomeric concrete or brick paint is suggested as an option. Does that work? We are trying to make it reasonably inexpensive, and not goopy for the concrete crew.

  3. Expert Member
    Dana Dorsett | | #3

    Latex elastomeric concrete waterproofers would work too.

    P10 of this document has a pretty good short list of what works:

    http://web.ornl.gov/sci/buildingsfoundations/Kohta%20Ueno-Capillarity%20Presentation.pdf

    Unlike asphalt based products Drylok isn't really goop, it'll be dry to the touch a day layer. Silane/siloxane wateproofing products are also non-goopy, but not cheap.

    Butyl flashing or EPDM products, or even purpose made DELTA®-FOOTING BARRIER all work too, but probably more expensive than UGL Drylok or asphalt based water proofers.

    Drylok runs about $110 for a 5 gallon bucket at the big blue or orange box stores, which is good for 500 square feet of coverage. That's probably your best bet if you need to pick it up on a weekend.

  4. GBA Editor
    Martin Holladay | | #4

    Steve,
    This topic has come up several times before on our Q&A pages.

    For a short thread that includes an answer to your question, see “What are people using for a capillary break between their footer and foundation wall?”

    For a longer thread with more discussion, see “Foundation capillary break & waterproofing.”

  5. Steve Wilson | | #5

    I picked up some UGL Drylock and will be happily painting in the morning :-)
    Thanks again for the help and advice!

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |