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Old 10-14-2013, 09:02 PM   #1
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uneven floor


i just found out that my new kitchen subfloor is 1/4" lower. this room was an addition, and they used 1/2" planks. rest of the house is 3/4".

so, i need to raise it 1/4". what should i use ? i am thinking plywood, but idk. thats why i am asking.

thanx
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Old 10-14-2013, 10:41 PM   #2
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What's the plan for flooring.
Just 1/2 is not thick enough for any type of flooring, should have been at least 3/4.
1/4" is not going to add any strength.
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Old 10-14-2013, 11:03 PM   #3
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Quote:
Originally Posted by joecaption View Post
What's the plan for flooring.

Just 1/2 is not thick enough for any type of flooring, should have been at least 3/4.

1/4" is not going to add any strength.
i think i would like tile, but idk if i will make the joists strong enough. so, as it is now, idk what flooring will be going in, WHEN that time comes. i am sistering joists now, but idk if they will make the floor tile worthy.

it has its original 1/2" planks. i put 1/2" osb over that. i would have put 3/4" had i known. but things were hidden.

the 1/4" would only be to bring the floor flat with the rest of the house.
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Old 10-14-2013, 11:22 PM   #4
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1/4 plywood can not be used under tile.
How did you attach that OSB?
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Old 10-15-2013, 08:20 PM   #5
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Quote:
Originally Posted by joecaption View Post
1/4 plywood can not be used under tile.


How did you attach that OSB?
yeah, i know no wood should be under tile.

screws, a bunch of them. its is working out well. as we have been walking the the same in other parts of the house with no issues.
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Old 10-16-2013, 09:33 AM   #6
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Fix'n it,

Tile standards call for a minimum 3/4" exterior grade 'C' or higher for tile. I would tear out the 1/2" and replace it with at least 3/4". Now is the time to fix the floor. Your putting together a nice kitchen don't shortcut on the structure.

If your floor is not level now, take the top layer of 1/2" off and when you sister the joist make it level.

Last edited by NASCAR9; 10-16-2013 at 10:51 AM. Reason: add another comment
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Old 10-16-2013, 08:53 PM   #7
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what if i left it. flattened it out, and put durock ?
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Old 10-16-2013, 10:42 PM   #8
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Fix'n it,

If you think you'll tile you should level from the bottom to the top. You can make up a little with thin set, but don't try and make up more than 3/16".
Lookup 'tile lippage' and you'll see what a floor looks like that is not level.

I feel your pain, my bathroom was 3/4" out of level in 5 feet.
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Old 10-17-2013, 09:41 PM   #9
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i am going to check the floor thoroughly this weekend. and go from there. if i can't do tile, so be it. i check the floor half assed, and it looked to be about 1/2" in 12'. so we will see.
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Old 10-21-2013, 10:32 AM   #10
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ok, got it figured out. the floor is basicly flat & level. except for 5' where it angles down to the back wall, 1/2". so i put a piece of 1/2" osb and the the cabinets back. i got it all pretty leveled out. so i will take the cabinets back out, screw down my boards. then installed the cabinets.

my issue now = tapered from 1/2" down to 0"ish in 3' . any ideas ?
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Old 10-21-2013, 10:37 AM   #11
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kinda hard to see. but there ya go.
Attached Thumbnails
uneven floor-img_2194.jpg  
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Old 10-21-2013, 11:57 AM   #12
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Is the floor flat and level? I can't tell if you have gaps under the level.
I'm sure you know that OSB is not rated for tile. It will delaminate when it gets wet.
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Old 10-21-2013, 09:44 PM   #13
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see the left handle on the level, its touching the floor right there. the other end is on 1/2 osb. 3' that i need to fill. so that when i do whatever flooring, its basicly flat.

i am going to look into those vinyl tiles, they don't need grout, but can use grout.
but really, i am probably going to do some kind of wood.
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Old 10-21-2013, 10:39 PM   #14
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If your going to do a laminate of some sort or vinyl tiles, you could use self leveling concrete to fill the low spot. I don't know if you would be able to nail hardwood through the concrete.
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Old 10-21-2013, 10:54 PM   #15
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yeah, i was thinking that. but didn't know if it would be ok over the osb. i suppose i could paint the osb first. i am also thinking thin layers of thin set.
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