Author: The Avaire Team
Date: 9/1/2008 11:08 am EDT
While the polymer grid and flexible joints are designed to handle some degree of irregularities, the floor must be generally flat (1/4" in 10 feet). A slope is fine as long as it is level.
However, if you have consistent moisture, I would not recommend covering it with Avaire. While the moisture won't harm the tile, there is a risk that mold/mildew can develop under the tile. Also, if there is consistent heavy moisture during installation, it will negatively impact the grout cure.