Moved Foundation Bricks And Hollow Spot? - Building & Construction - DIY Chatroom Home Improvement Forum

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Old 09-27-2010, 10:55 PM   #1
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Moved Foundation Bricks and Hollow spot?

We recently purchased a home that was built in 1980.

It has a foundation of concrete bricks.

The middle of the foundation has a small enclave (for lack of a better word), that provides room for a porch (the porch doesn't sit on the foundation.)

Anyway, part of that section of wall has a mortar crack that has caused a portion of those bricks to move forward at the bottom--starting maybe two bricks up.

This doesn't appear to have affected where the frame sits---the frame doesn't appear to have moved at all---but I'm wondering what it could mean. (Also, the basement is dry, no worries there.)

One contractor suggested it was from a small earthquake (we sometimes get very minor ones) and that it was nothing to worry about.

Also, when you tap one of the bricks, it sounds completely hollow behind it, unlike the rest of them.

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Old 09-28-2010, 05:51 AM   #2
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Part of a foundation out of line with the rest is not right, and needs investigation by someone that understands such things.
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Old 09-28-2010, 08:05 AM   #3
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It sounds like you have a house made of hollow concrete block. Possibly most of the block was filled with concrete, however the hollow sound may be from a block that did not get filled. It is unlikely that the crack caused the block to move, more likely the block moved due to lateral earth pressure, causing the crack. You should bring in a professional with expertise in foundations to determine how much movement has occurred, if it is serious, and what options you may have for repair. Movement in concrete block walls is pretty common, and there is an entire industry devoted to repairing block foundation issues.
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Old 09-28-2010, 08:43 AM   #4
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post pics? i am curious
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