Got a concrete block wallabout 20' high that had another wall built next to it to enlarge the building. There is about a 1/2 inch gap between them. The original caulk has seen better days and is letting water in. What is best to seal this straight 20ft verticle 1/2inch gap between 2 concrete blcok walls? I thought I might use sawzall to remove old caulk. I don't suppose anyone makes foam that I could spray in there that would waterproof this gap. Maybe spray foam to close up the gap within 1/2 inch of the outside then fill the last 1/2inch with a caulk? Any ideas. TIA
- posted
18 years ago