What are people using for a capillary break between their footer and foundation wall?
dvaut
| Posted in Energy Efficiency and Durability on
I am getting ready to break ground and of course their are a few minor details I am figuring last minute. One is the capillary break for the footer. I am building in a heavy clay soil that will most certainly have water. I am torn between painting on dry-loc extreme which is most likely cheaper but not really designed for the purpose, and corsella dorken’s product delta-footing barrier which is more expensive and has to be ordered. Are there any other low cost alternatives that function well?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
Search and download construction details
Replies
Dillon,
This question has come up before. Here is my standard list of products you might use:
1. Asphalt-based dampproofing.
2. Latex-based low-permeability paint (elastomeric paint) -- for example, UGL DryLock latex masonry paint.
3. Delta Footing Barrier.
4. Cementitious coatings (cement-based waterproofing) -- for example, Thoroseal.
5. A fluid-applied product like Tremco TREMproof 250GC, Henry CM100 Cold Fluid-Applied High Building Waterproofing, ePro ECOLINE-R Liquid Applied Membrane, or BASF MasterSeal HLM 5000 (formerly SonoShield HLM 5000).
6. Some builders have used 6-mil poly, although poly isn't easy to work with in this location. (Then again, asphaltic dampproofing isn't easy to work with either.)
Here is a link to a relevant video: Installing a capillary break on top of concrete footings.
Martin -
Elsewhere on a GBA thread, people strongly recommended against asphalt-based dampproofing as the capillary break. Do you share this view / have you seen any evidence to support it?
Cody