[georgewash]

I have installed Durock in my kitchen floor, and after I glued and screwed it all down, I noticed that the floor is all on one plane, perfectly flat, except for an area that runs from one of the walls to a spot about three feet from the wall. This area slopes downward. So... Can I use a floor leveling product or should I build it up with thinset, let that dry, and then lay my tiles with more thinset on top of that? Any suggestions?

[JazMan]

Sure you can use a leveler, there are many. In a pinch and if the thickness is slight, you can use thin set too, but a product made to fill and level is best. Be sure it's a Portland based product. A self leveling cement may work if the rest of the floor is level, otherwise stay away from SLC. How thick would the new fill be?

Jaz

[georgewash]

The joists in question dip down about 1". I was thinking of using rapid set mortar in the morning and then coming back in the evening and using regular versabond thin set mortar. What do you think?

[JazMan]

By rapid set mortar do you mean thin set tile mortar? If so, NO. Get a patching cement, which also comes in rapid set.

Jaz