This crack has caused a layer of cement wall, about 1/2 inch thick, to fall off. The area of the layer that has come off is about 1ft by 1ft. Do I need to add cement to the wall to fix it? My house is a 1920-40 era colonial so the house is pretty old. The basement wasn't finished, but there was drywall on the wall where the crack was. I removed the wall because of water damage and I found the crack. I am not going to finish the basement, I just want to waterproof the wall, paint it and have the exposed concrete. I plan on doing this myself if it is possible. Additionally I found some thin roots in the wall where the 1/2in layer of concrete came off. Should I be worried about that? Thanks in advance.
we had this problem in my old house honestly the best thing you can do is call a professional foundation service to fix it right so it does not get worse over the coming years and become a serious problem but you can get some stuff kinda like concrete but its used to patch stuff like that you could find it at home depot then id cover it with stop leak to seal it from moisture or you could get ghetto if your stapped for cash and just get some good caulk to fill it but i doubt it would last all too long
Go to Lowes and check out the hydraulic cement, and see if this would work for you....you will have to find the source of the roots and get rid of the roots...since it is leaking, the hydraulic cement will get harder with moisture, you can do a web search and see if you think this product would work to solve your problem, Good Luck
You can buy a two part poly injection system on line that will fix the crack.After the crack is fixed fix the 12x12 area with a vinyl concrete.
You make reference to the wall being concrete , so I will assume it is a poured wall rather than a block wall. If the wall had just a simple crack, chiseling out the crack about a half inch deep and filling with a Hydraulic cement would work fine. What concerns me is that you say a 1/2 inch X 1ft. X 1ft area has come off. Crumbled I would suspect. The structural integrity of the wall has been compromised by excessive dampness. Basically turning the concrete back into sand. First thing you should do is stop the dampness. This could mean sloping the grade away from the house. Extending downspouts to 3 or more feet beyond the house. Maybe even putting in a sump system. If you don't, any repair you do will not last and just fall off at a later date. I strongly suggest you get a professional to look at it. Hopefully that area is not badly deteriorated. Deal with the problem first, then the consequences of that problem. Once that is done the wall can dry out. Scrape the area with a chisel, then wire brush. Clean the area with a cement etching product, (found at your local home depot) then trowel on the same hydraulic cement mentioned earlier. This product can be applied even when the wall is still leaking and works well, but if you can, do the prep work. There are real good wall waterproof paints available. They are really thick and rolls on like a paste. Works great though. Good luck........
