Thank you for all replies. I still have questions below. In second picture, you can see a crack, it goes about 20 feet along light dark color in top picture, and the crack always under the light dark color. 1)this is Cold joint??? not horizontal crack? 2) cold joint always is with a crack line? and it is so long? 3) cold joint always has crack on both side (inside and outside) of foundation wall? 4) crack of cold joint is getting worse when house gets old, cold joint is not stable? 5)White power was caused by leaking from crack of cold joint? 6) do I need to fix this crack if I buy this house? 7)Do I need to hire a Structural engineer to look the crack and get a stamped report, so I can show next buyer in future when I need to sell . Sorry, too many questions, it is first time to buy house. Thank you everybody. Click to Enlarge 43.46 KB Click to Enlarge 33.91 KB Click to Enlarge 40.73 KB