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Old 02-20-2013, 10:30 PM   #1
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Bulking up the corner of a floor

Hi All,

I've got a kitchen that's down to the 1/2" plywood subfloor. I'm going to put down 3/4" tongue and groove plywood, then 1/4" Sureply underlayment, and then dry-lay vinyl sheet.

One corner of the kitchen is a bit lower than the rest of the floor. I've attached pictures to show it. The first picture shows an outline of the area. The second picture shows what it looks like from the side. The third pic shows the depth at the far corner -- about 5/8". As you move along the wall towards the middle of the room, it shallows to about 1/4", which you can see in the last picture.

I've had various suggestions about how to "bulk up" this corner:

o Self-leveling compound

o Patching compound

o Concrete

While the floor isn't exactly level overall, I probably can use self-leveling compound in this corner. Could anyone suggest how much I'd need -- 25 lb. bag, 50 lb. ?

With regards to patching compound, I can probably just ladle it on and smooth it out level with the rest of the floor. Again, could anyone suggest how much I'd need -- 25 lb. bag, 50 lb. ?

Finally, while using regular concrete seems at first blush to be bizarre, what are self-leveling and patching compounds but some form of concrete. Since I'm essentially just trying to fill a void over which I'll be putting 1" total of plywood (3/4" T&G and 1/4" underlayment), perhaps this isn't such a bad choice. I particularly like it since I already have concrete, and I'd love to get rid of it. Any thoughts?


Attached Thumbnails
Bulking up the corner of a floor-img_1404.jpg   Bulking up the corner of a floor-img_1405.jpg   Bulking up the corner of a floor-img_1407.jpg   Bulking up the corner of a floor-img_1409.jpg  


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Old 02-21-2013, 09:45 AM   #2
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Hello RichardZ

May I ask what you have under the wall that is sinking?....

If there is basment under the floor Would you consider rasing the wall up?

As far as plywood 1/4" probably will pucker when attached if you can spare the extra 1/4" use 1/2 over 3/4"


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