Staff Answer
Aug 28, 2020 - 12:08 PM
Per the install instructions at the right hand side of the page under Downloads https://www.greenbuildingsupply.com/c... , yes. "WISE on ceramic tile floors--The maximum joint should not be wider than 2mm (0.08"), and 1mm (0.04") depth. If this is not the case, or if there is any kind of embossing, skim coat the grout lines with a floor leveler). All types of concrete, ceramic subfloors must be even, dry, variations should not exceed 5mm in 2m (0.20" in 6.6 feet) and flat."
