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I removed a rotten 4x4 post that was used for a fence. The concrete hole seems sound. I was thinking of putting a 2 3/8 metal pole in this 4x4 hole and then filling with concrete.

I am not sure if there would be enough new concrete around the metal post to make a secure fit.

If this works I will probably replace all the 4x4 wood posts with metal posts.

Any ideas or previous experience around this would be appreciated.

  • So are you saying you were able to pull the wood post out of the concrete? Is the concrete solid no breaks? If it is cracked or broken there would not be much new material to hold together. If it is solid a little extra Portland cement mixed with sand and wet enough to get it in the hole would work. – Ed Beal Mar 25 '16 at 14:01
  • Yes. I would pull the wood post out of the concrete. So far I have pulled three out of the concrete leaving a 4x4 space in what looks like a good concrete base. I have not pulled out all the posts so I am sure there will be some that are cracked, if they are I can use your approach. – Badger2001 Mar 25 '16 at 14:10
  • I am not sure if it is cracked in 2 pieces if there would be enough strength but worth a try.cement made with sand is more of a mortar but this will be thin so it may work and it will bond to the original cement. – Ed Beal Mar 25 '16 at 15:30
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You'll have a hard time getting concrete into a 1" gap. You'll want to either enlarge the hole slightly or use a loose sand mix concrete, which will likely crack up, but should retain the post adequately.

  • Thats a great idea. If sand doesnt work it would easy to start over. The wholes are pretty deep, close to 2ft. Hopfully enough to hold. – Badger2001 Mar 25 '16 at 13:54
  • @Badger2001, just to make sure you got it, he's talking about a concrete mix made with sand rather than larger aggregate. Not just sand... – JPhi1618 Mar 25 '16 at 14:52
  • My original post mentioned plain sand. Sorry about the confusion. – isherwood Mar 25 '16 at 16:00

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