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Posted by: from Mississauga
2/6/2012 at 10:25:32 PM

I was considering using Delta -FL or Super Seal to lay down over my concrete basement floor.

What would I require to level my sub-floor(osb or plywood)? Could I double up on the above where I need to make it level before I install the sub-floor?

Can I tile over the Delta or Super Seal?

Does anyone know where I could purchase Flex-Seal or DryBox in the GTA?

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Date/Time2/7/2012 at 7:41:45 AM

There are a lot of different ways to level the floor. If you are insulating between the delta and plywood (highly recomend if you want a warm floor especially with tiles) you can use the tapered insulation they use for flat roofs over the 1" or 2" blue or pink foam insulation. It comes in diffferent pitchs and can get the floor very close to level.

Another way if you are tileing is to attach on top of the plywood various thicknesses of plywood ( 1/4, 3/8, 1/2, 5/8 etc.) screwed down very well. The rough edges can be smoothed with thinset and then install your ditra membrane over that.

Option 3 is once the first layer of plywood is down, you can use self leveling cement if you want it to be perfect.

These are only a few options and I'm sure others have different ways of doing it.

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Michael in Mississauga
Date/Time2/7/2012 at 12:09:48 PM

I was considering "stacking" the delta/super seal since they have dimples over the areas to level.

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Date/Time2/7/2012 at 1:07:04 PM

James is correct in that there are many ways in which to level and install a basement floor. Personally, the best way to level the floor is to use on the self levelling products on the market and be sure to follow the manufacturer's instruction closely.


Kingsway Construction Inc

Glenn Rosborough

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Date/Time2/7/2012 at 1:37:23 PM

I don't think stacking will work. They don't fit tightly together and will move up and down depending on the weight on them. When you do tiles you want the subfloor to be as firm and solid as possible. Otherwise you will get cracks, even with the ditra membrane.

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