Leveling uneven floor for new wood laminate

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Old 09-19-16, 07:57 PM
J
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Leveling uneven floor for new wood laminate

I am laying a new wood laminate floor down in both my living room and dining room. The problem I am having is the floor is Uneven. Some of the spots I am able to fill out with shingles to level out as best as I can but in certain areas the difference is over an inch. Those areas are at the edge of the wall. I was just thinking of trying to even it out as best as I can with wood scraps and then using leveling cement to fill it in and smooth it out. Any ideas would be great. Even if you think shingles are a bad idea I would like to know. I am trying to keep the floor within 5mm of flat Ness.
 
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Old 09-19-16, 08:04 PM
J
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Need to be addressing this issue long before laying new floor.
It's so bad you need to be looking below the room and finding out why it's sagging that much.
Insect damage, cracked, over spanned joist,
Fungus damaged joist?
Undersized, over spanned joist.
Piers sinking?
 
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Old 09-20-16, 03:18 AM
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I agree! You need to find and correct the source of the problem.
btw - welcome to the forums Joe!
 
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Old 09-21-16, 10:17 AM
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Foundation

The foundation of the home was in bad shape and I replaced it a couple of years ago. All the joists are in good condition and no mold. I did use adjustable floor Jack's to even the floor in some spots
 

Last edited by Joe Haas; 09-21-16 at 10:21 AM. Reason: ADDING LINES
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Old 09-21-16, 10:42 AM
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How was the foundation replaced? and why wasn't the structure re leveled at that time?
 
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Old 09-26-16, 01:41 PM
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Actually only the walls were replaced because contract said because the floor had no cracks the underneath should be fine. The house was jacked a little which of course cracked plaster in some places and replaced with new blocks. Is it possible to lay leveling compound under the subfloor so I can put pieces of wood in places to try and reduce the amount of compound needed?
 
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Old 09-26-16, 01:45 PM
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The leveling compound has to go on top of the subfloor, if you tried to use it underneath it would fall between the joists The only way to level it under the subfloor is to either raise the joists where needed or sister a new joist along side of the old ones [set to level]
 
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Old 09-26-16, 05:58 PM
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I am laying a new wood laminate floor
Which is it, wood or laminate? I'm guessing laminate and you haven't found out yet that 'wood' has nothing to do with it. Any voids under laminate are going to make it sound even more hollow and cheap and lead to cracks and failures. I don't think shingles and blocks of wood are the answer here, you need to create a real level floor despite what it's going to cost or take in effort or your flooring is going to fail in short order.
 
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