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Rotten Subfloor goes under support post of my lanai Roof. Best recommendation so far is to cut 3/4 inch thick end off a 2x4 (post is a 4x4) hammer under one side, scrape/chisel out other side of rotten subfloor under post, add another 2/4 "shim". then simply cut new subfloor around 4x4 post.

Can't figure out how to post pics, but I have em...

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Im Not For sure I'm Understanding What your saying But any time I have to work on a Support, Here what i do !

For Instance I Just Replaced A 6x6 Post That Is under a roof Over Hang On A House! I took A Car Jack And Used A 4x4 I Put It Under The Beam That is sitting On the 6x6 Im Replacing. I Lifted The Jack Just enough To Take The weight Off The 6x6.

I then Pulled It Out and Put the new one in! You Could Probably Use That! If your support Is Holding More then Just One spot youll need to support what ever it is supporting! Just take take the weight off the post change the subfloor under it and put the weight back on!!!

Hope that was help full Good Luck

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  • What you are suggesting is dangerous -- car jacks should not be trusted as a support: it's the reason people use jack stands when working on a car. Also, -1 because your spelling/capitalization/punctuation/grammar just make my head hurt.
    – gregmac
    Nov 11, 2014 at 18:06

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