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Old 04-27-2008, 07:57 PM   #1
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Joining foundations in addition


Adding a suite for Mom to move in. Do we epoxy the rebar that we drilled into the old foundation? It seems to me if we don't the slab could shift and we could have foundation trouble. Someone told me it would be okay. We lived through foundation failure once before and would not want to go through that again. We are in the deep south with very heavy clay soil and LOTS of moisture. Any advice would sure be appreciated!!!

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Old 04-27-2008, 08:36 PM   #2
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Joining foundations in addition


It is always best to epoxy the rebar into the old concrete.

You never have a tight enough fit. A very small movement can cause cracks. Onr thing that people do no realize is that if there is possibly any settlement, all the load goest to the rebar with the most resistance - after it cracks above/below that one, and the loads goes to next stronger and so on like a zipper.

You only do it once, so epoxy to make sure all the bars work together and not individually.

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Old 04-28-2008, 02:25 PM   #3
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Joining foundations in addition


Thanks so much for the quick response. The foundation is the one thing I am the most nervous about due to prior experience with foundation failure. Once it is done and done correctly maybe I'll be at peace. We will epoxy away!
Thanks again!
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Old 04-28-2008, 04:45 PM   #4
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Joining foundations in addition


Just make sure you have well compacted or good, undisturbed soil under your new footings. - You can't expected the old footings to support the new addition.
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