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Old 04-14-2018, 05:44 PM   #1
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Floor is WAY not flat


Low budget renovation, 100 year old house, looking at living room left to right, joists running directly away from me. Starting at left, gradually dips and then rises over a length of about 8 to a high point.....and then dips again towards the other end which is an additional 4. So, we have a max depression of around 1 1/2 midway across the larger area and the a straight drop of about 1 over the additional 4.

This activity is only at one end of the room, maybe coming 6 into the room befor thins mostly flatten out. Nothing structural to see from below....and tearing out the joists etc. and shimming up is not an option. Goal at this point is to get it decently flat enough to carpet it and call it a day. Suggestions???. Thanks in advance
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Old 04-14-2018, 06:11 PM   #2
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Re: Floor is WAY not flat


Clarification questions:
Are we talking about the living room floor joists that can be seen from the cellar or are you looking at the joists from above?
Is the subfloor still installed or not?
Any pics?
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Old 04-14-2018, 06:32 PM   #3
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Re: Floor is WAY not flat


All we did for at least 15 years was work on 100 plus year old houses.
Never once saw a flat or level anything.
Under sized, over spanned, joist, improper footings under piers was the norm.
Unless your willing to spend the time and money to fix it, it is what it is.
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Old 04-14-2018, 07:25 PM   #4
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Re: Floor is WAY not flat


Quote:
Originally Posted by Guap0_ View Post
Clarification questions:
Are we talking about the living room floor joists that can be seen from the cellar or are you looking at the joists from above?
Is the subfloor still installed or not?
Any pics?
First floor, joists see from below, subfloor of one bye planks covered by 1/4 ply with a million staples in it still in place. Ron
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Old 04-14-2018, 07:28 PM   #5
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Re: Floor is WAY not flat


Quote:
Nothing structural to see from below....and tearing out the joists etc. and shimming up is not an option.
Goal at this point is to get it decently flat enough to carpet it and call it a day. Suggestions???.
Ayuh,.... Floors off that much are Fixed from below,.....

Luckily for you, Carpet won't care, 'n can roll with the flow,.....
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Old 04-14-2018, 07:55 PM   #6
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Re: Floor is WAY not flat


I'm no carpenter but I've seen 4 approaches:
1) Jack it up till level and support.
2) Build new sub-floor shimmed level.
3) Pour on self leveling concrete.
4) Cover it with carpet or vinyl or something else forgiving and live with it.
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Old 04-14-2018, 08:26 PM   #7
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Re: Floor is WAY not flat


I'm in about the same situation. 1920's house. It is wood joists, subfloor and 1x strip flooring, but I am seriously thinking about using cheap mortar, then cover with stick on ice shield to hold all the pieces that might crack. Have thought about leveler but they are all about same weight anyway. Then cover with 3/4 floating floor.
BTW the sagging joists were doubled.
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Old 04-15-2018, 09:09 AM   #8
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Re: Floor is WAY not flat


The funnest leveling attempt I ever saw was when they had installed 5 layers of plywood, thinking that was going to make it flatter.
The home owner lived out of state and keep letting hacks live there letting them have cheap rent of they "fixed" it up.
I looked under the house and all the old brick piers had failed, that was the real issue.
I knew something was up when I walked in and saw what looked like 4", 5/4 baseboards instead of the normal 6" in older homes.
All the doors had also been cut off at the bottom with what looked like a sawzall.
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