My basement walls are made of concrete block. My house is 30 yrs. old. Recently, I have noticed that one of the vertical cracks on one of the blocks has gone from hairline width to approximately 1/8" in width. I have not had any flooding or water damage in my basement at all. Do you think this crack widening is a warning sign? How do I determine what the cause of this crack widening is? How can I control the crack widening or repair it permanently? Thanks a lot.
One block?Not bad!When there is extreme settling in a concrete block structure,you can have a crack that runs through several or many layers of block.Although I wouldn't give this much more thought,it is acceptable to caulk the crack for eye appeal if you wish.
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