Will concrete harden although some rotted wood is still in hole?

closed as unclear what you're asking by Tester101 Sep 4 '14 at 16:52

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    Yes concrete will still harden...what you are trying to accomplish, and in what context would make this question more answerable. – James Sep 4 '14 at 13:23

Highly recommend you dig out the rotted post, especially for a patio. Do it right the first time, going back later will be a nightmare.

If you want to take the lazy way out, cut the post and bury it. Add another one directly next to it.


Hydration is the chemical process by which concrete mixtures harden. Absent a retarding admixture, the hydration reaction occurs in any proper concrete mix. Wood, rotten or otherwise, is not typically a retarding admixture.

Embedding rotten wood in a foundation is not consistent with good practice, industry standards, and building codes. Furthermore, embedding wood in concrete is, in general, a sub-optimal practice.

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