10/14/2026
A white, chalky residue on basement walls is easy to mistake for dust or old paint. It is actually mineral deposits left behind when water moves through concrete or block and evaporates on the inside surface. That means moisture is getting through the wall, even if you have never seen a puddle on the floor. After the first few fall rains, take a flashlight to the basement and look along the bottom of the walls and in the corners. Fresh deposits or damp patches show you where water is coming in. Chapman Drainage can trace those signs back to the source outside during a free inspection. 614.273.0429