05:36PM | 09/07/03
Member Since: 09/06/03
1 lifetime posts
I live in a brick ranch style house in the midwest (ohio). There is a space between the brick wall of the house and the outside concrete patio floor. I assume that this space should be filled. It is about 1/4 to 1/2 inch in width. What should I use? I did not know if something flexible should be used to fill the space or not to adjust to the seasonal swelling of the house. What should I do?

Glenn Good

01:17PM | 09/12/03
Member Since: 09/10/03
314 lifetime posts
The best thing to use is a "foam backer rod" covered with a good polyurethane caulking. The foam backer rod should be sized larger than the crack.

Example: Use a 3/4"-7/8" rod to fill a 1/2" gap. Compress the rod into the crack leaving it about 1/4”-3/8" below the surface then fill in over top of it using the caulking.

If you use self leveling polyurethane caulking, it will flow out flat filling the crack.

You do not want to fill the entire depth of the crack with caulking. Without using the backer rod first the caulk will not adhere well to the wall and the concrete slab through periods of movement caused by expansion and contraction.


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