Water (even just dampness) will wash the lime out of concrete cinder blocks. The lime (from the cement holding the blocks together) will remain behind on the surface of the block as the water evaporates. If the block can be wire brushed to the point it becomes loose, or reduced to thin sections, it is very unsafe. If it is in whole sections of wall, I would get a contractor you trust to test a section. If it is salvagable, humidity reduction or water protection from the opposite side should be installed. THe blocks might be able to be protected from further decay, but I would get professional assistance. The worst would be to timber up the section of wall and replace the block. Not good news, but neither is falling into ones own basement. JimN
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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