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Old 09-20-2012, 08:23 PM   #1
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Sagging Floor


I am looking to find the best way to fix a sagging interior wall. The wall runs parallel with the floor joists near the kitchen and has sagged about 1 inch. I am thinking the best way to do this would be to jack up the wall from the basement and to possibly put blocks in between the top of the joists where the wall sits (perpendicular to the joists) to support the weight of the wall. If anyone has any tips they would be appreciated. Thank you.

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Old 09-20-2012, 08:34 PM   #2
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Sagging Floor


I think you are good with that.

GOOD LUCK!

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Old 09-20-2012, 09:33 PM   #3
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Sagging Floor


depending on how long the wall is, one jack may not suffice to lift the wall. Set 2 jacks in toward the center of the wall from the ends about 1/3 of the way for each jack. Or try one jack in the middle.

A new, full length ( inside girder to outer band) double joist placed under the wall would be the ideal solution though.
With older homes, I've seen interior walls placed on top of diagonal 1x floor sheathing spaced one inch apart along with 24" joist spacing so the walls would sag to no limits. Back when those homes were being built 1x meant a full 1" thick piece of lumber and some of the boards are/were up to 1 1/4" thick! so that makes for a strong floor to start with but the walls still made the wood sag.
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Old 09-20-2012, 11:35 PM   #4
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Sagging Floor


are the floor joists sagging or just the plywood between the joists.

If you block it between the joists may need say every 4' or so.
Add a floor joist or double joist in below the wall if possible.
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Old 09-21-2012, 08:55 AM   #5
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Sagging Floor


Can you post a picture, it would help to explain.

House construction here in the Uk is different, we tend to build in brick over here.
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