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Raising A Subfloor

 
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Old 02-23-2013, 09:55 PM   #1
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Raising A Subfloor


Hello guys im kinda new to this site i need a little help here I am a paint contractor by trade and to make ends meet ive taken on a few tile jobs and now ive got one that has me baffeled a bit. i have a bathroom in a homa build in 1948 and it has slab flooring with hard wood floors on top best i can tell from the rotting in the floor in the bathroom the slab is 3 inches below the finished floor. my ? is what is the best method for raising my subfloor level up 2.5 inches so i can lay tile any advise or imput would be helpful thank you guys very much. and please no bashing or trashing and negativity i dont have time for it i get enough of it from painttalk please.
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Old 02-23-2013, 11:39 PM   #2
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Re: Raising A Subfloor


Three sheets of plywood and some extra mortar on the tile?

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Old 02-24-2013, 12:05 AM   #3
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Re: Raising A Subfloor


2 by sleepier's on floor them plywood . Atfer that wonder board or ditra on floor under tile . Just play the numbers game to get your hieght your looking for .
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Old 02-24-2013, 12:07 AM   #4
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Re: Raising A Subfloor


Fill it with concrete & be done with it....
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Old 02-24-2013, 12:16 AM   #5
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Re: Raising A Subfloor


Im with Griz - level with a concrete or better build up with concrete and overlay a self leveling cement. Sleepers for that much in a bathroom is a pit for water.
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Old 02-24-2013, 08:01 PM   #6
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is it very hard to lay concrete in bathroom and get it level
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Old 02-24-2013, 09:51 PM   #7
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Re: Raising A Subfloor


Dry pack mud bed just like for shower floors.

Slurry Portland paste on slab then mix Portland and sand 1 part Portland 4 parts sand, mix it then add water with a sprinkle can while mixing till when you pick it up and squeeze it in your hand it sticks together, then dump buckets full and pack it down using a trowel .
Outline the perimeter for your height then fill in middle and use edges as screed boards. Let it set up then thinset your tile to the mud bed. Key in the thinset to the mud bed by using the flat side of trowel then flip and comb the appropriate notched trowel

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