How Bad is this Crack in the Foundation?


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Old 10-01-12, 05:15 PM
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How Bad is this Crack in the Foundation?

Hi:

I have a hairline crack in a basement foundation wall. The crack is mostly horizontal and is no bigger than 1/16 of an inch. The crack is about 7 feet long. The crack appears in between the cement blocks, where the mortar is. I do not know how long the crack has been there. The cement blocks are 8 inches in depth.

Do I need to do something about this crack? What can I do? Do cracks like this usually lead to big problems?

Thank you for your insight.
 
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Old 10-02-12, 04:13 AM
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How much of the block is below grade? are you sure it's only 8" block? Normal practice is to use 12" block below grade. How old is the house?

I wouldn't be overly concerned about those cracks but would keep an eye on them to make sure they don't grow.
 
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Old 10-02-12, 04:22 AM
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The blocks are entirely underground. I used a basement window as a way to measure the depth of the blocks, and the measurement of the depth of the blocks, at least, around the basement window, was 8 inches. I believe that the house was built in the 1950s or 1960s.
 
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Old 10-03-12, 01:21 AM
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If it helps you sleep better at night, work some (low-modulus) mortar into the cracks with a rubber float. Doing so will fill them, while still having a little "give" to prevent further cracking.
 
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Old 10-03-12, 07:41 AM
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Hi Bridgeman45:

Thank you for the advice and recommendation.
 
 

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