Foundation crack

problem: What is best to use to repair a small crack in basement foundation Sheridan, USA

A small crack may not require any repairs unless: 1. It allows water to reach the reinforcing steel, or 2. It is part of a structural problem that has been repaired. The most common repair for structural cracks is Epoxy Injections. These are usually done by professionals who have experience and the needed equipment. In the case of a single small crack you may have to resort to a do-it-yourself kit which you can find by searching the Internet. In my experience, unless you see moisture transmission through the crack (including white deposits on the surface), it is best to leave it alone. If the crack is caused by structural stresses you need to make sure that these are taken care of before injecting since it is likely that a new crack will open next to the repair. Hope this helps.