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Re: Front Patio Cinder Block Repair

From: jeeptj48066@aol.com
Category: Other/Misc
Remote Name: 68.41.228.104
Date: 08 Apr 2006
Time: 01:54 PM

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Question: I have a cinder block front porch. Some of the blocks in the front need to be repaired. Is there a way to repair them or will I have to replace them? The blocks are also holding up the porch slab which is concrete. Am I going to have a problem with that slab? Thank you, Heath DeShano

Builders Websource Answer: Depending on the level of damage to the existing blocks, replacement of faulty ones may be required.  We often see cinder block foundations without internal grout or proper vertical and horizontal steel reinforcement. This creates a very weak support wall that's subject to shifting, crumbling, and settling. Furthermore, given the weight of the porch slab and depending on how it's anchored to the block supports, be extremely careful to avoid any situation in which collapse of the porch could injure you or any laborers. If you have access under the porch area, you may need to jack up the porch while the block walls are under repair. However, if the foundation supporting the cinder blocks is insufficient, you'll need to install a proper footing with vertical rebar at least every 16 inches or according to local building codes. The blocks should be staggered, grouted, and filled solid with cementitious grout. Horizontal rebar is generally required on every 2nd course. If you have any doubt about what you're attempting to repair, consult with licensed structural engineer who can recommend the proper foundation and anchoring mechanism for the wall and the porch. Then hire a competent and licensed contractor (possibly a masonry contractor) to complete the job for you.

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