Quote:
Originally Posted by Ngilbe36
I have this same issue with my basement foundation wall which is concrete block. I assume at some point in the past 98 years the basement has seen water and caused this issue. I have taken out the lose material and filled with hydraulic cement. I will then cover these spots and the whole wall with waterproofer paint before framing down there.
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The real long-term solution is to make sure the exterior of your basement walls are waterproofed, and that your yard is graded (that is, sloped) so that water runs away from the house. This includes areas of landscaping; make sure water can't get to the wall or pool next to it. Once water runs down the wall and forms a column the height of the wall, there's enough pressure to force the water through anything - the blocks and any coating that's on them. Gutters are a good option too.