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Old 08-20-2011, 05:02 PM   #1
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How to repair cement block walls


A crawl space under part of my house has cement block walls on three sides. Many of the vertical mortar joints have cracked and are quite wide with deep voids behind them. Should I try to fill the voids and joints with mortar or fill the voids with something else first?

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Old 08-20-2011, 07:22 PM   #2
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How to repair cement block walls


Post some photos. The issue could be simple or complex.

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Old 08-20-2011, 07:30 PM   #3
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How to repair cement block walls


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Originally Posted by hc1974 View Post
A crawl space under part of my house has cement block walls on three sides. Many of the vertical mortar joints have cracked and are quite wide with deep voids behind them. Should I try to fill the voids and joints with mortar or fill the voids with something else first?
Concrete blocks are designed with a void in the middle of the ends, of the block. When a block is laid, mortar is applied to the outer, corner edges only.
If you are going to repair the mortar, its only necessary to replace it where the blocks meet. The void in the center need not be filled.
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