Thread: subfloor prep
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Old 06-22-2009, 07:19 PM
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Default subfloor prep

Author: Larry
Date: 4/22/2008 7:51 pm EDT
Ok, the local store had some avaire tile on sale so I went and picked up enough to do my kitchen and dining area.

I had parquet wood squares down and didnt want to lay the avaire tile over the top due to height concerns and the chance that I may need to remove my dish washer.

So I began by pulling up all the old parquet, it didnt come up too hard but the adhesive used was a little rough on the plywood underlayment in spots.

I began so sand off excess adhesive and hit visibly high spots with a belt sander when things came to a screeching halt when I got into the dining room where another type of adhesive must have been used. It just gummed up the belt after a few seconds so it was off to plan B, a heat gun and a putty knife. 10+ hours later I finally got the glue up.

I slid a single tile around the room checking to see if it would teeter and for the most part all seemed fine. I hit a couple more evident high spots with a belt sander and filled some low spots with a skim coat. I then snapped a few tiles together to plan my layout and then began sliding this small bunch around and in area that were previously fine there seemed to be some rise and fall as I pressed down on various areas of the small batch of tiles.

Not wanting to risk breaking any tiles I figured that was too much movement.

Headed to the local store and picked up some pails of concrete based self leveling underlayment. Supposedly easy flowing and self leveling. Since none of my low spots/high spots seemed very extreme over any distance, with gauging rake in hand (set to less than 1/8") I began to pour my mixed self leveling underlayment. I used the exact amount of water recommended and while the stuff did flow, it didnt flow anywhere near as easy as I expected. Thinking it was easy flowing I didnt bother with a smoothing blade thinking it would all just flow and even out.

Fast forward to the next day, what a mess. The floor is now less even than when I started, the self leveling underlayment wasnt so self leveling and is bonded to the subfloor nice and tight.

The manufacturer recommended I simply add another coat but I simply cant see spending the money to add more height (which im trying to avoid) just to have a still uneven floor.

So, whats the point of my post? Well, there is no doubt that the actual avaire tile installation is easier that standard tile but as things sit for me now it would have a heck of a lot easier for me just to lay down standard tile.

I for one would really like to know how everyone is getting their subfloor flat enough to lay avaire tile or am I just being too critical?

Now I am left going over my *cough* self leveling *cough* underlayment with more skim coat in an effort to level things out and prevent any teetering but it seems everytime I get one teeter fixed another pops us..
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