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General Contractor
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32 Posts
Discussion Starter #1
I am looking at a carpeted floor that has a big dip in it.

The floor is built on 6x8 joists 4' on center and one of them is crowning downward. (it is exposed beam on the ceiling below)

It would be pretty major to replace this joist , it has been there since the 70's so I would think it has done all its moving and is stable now.

The main concern is the floor above and the very noticeable dip in it.

It is probably close to 3/4" in the lowest spot.

What is the best way to fill this so it is not so drastic? Should I just use some leveling stuff and let the carpet padding float over the deep area?

What should I use?

thanks for any input
 

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Pro Flooring Installer
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7,435 Posts
If you don't level it, the carpet will be like a trampoline. It will eventually come off the strip. Why not put a piece of osb or plywood in the middle and float it level.
 

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General Contractor
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32 Posts
Discussion Starter #3
If you don't level it, the carpet will be like a trampoline. It will eventually come off the strip. Why not put a piece of osb or plywood in the middle and float it level.
Duh, of course I want to level it. The dip is very noticeable and like you said it is flexing off the tackstrips.

Using some ply/osb and floating out is a good idea, thanks!
 

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Household Handyman
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2,480 Posts
"The floor is built on 6x8 joists 4' on center" This seems to be a very long span for floor joist to me. i understand the fact that this is the second floor and the first floor has exposed beams which appear to be the floor joist for the second floor. Still a long span. What are the second floor decking panels made of and how thick are they? For a 48" span it sounds as if they should be no less than 1" thick and certainly plywood rate for flooring. The damage is now done. Maybe the build-up of the sunken area and skimming to level it are the correct solution at this point, but this would only be a get-by in my opinion, as it will certainly sink again at some point somewhere. If the beam on the first floor is now sunken also, is there any possibility of it being taken lose on each end and turned over? Just a though. Thanks, David
 
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