Whichever float strip is desired, ensure to totally moisten the strip earlier than use. This retains the strip from immediately sucking the moisture out of the mortar making adjustment difficult. This technique must be used on gentle duty interior flooring not uncovered to moisture. It is really helpful that the sub flooring is a minimum of 5/eight″ plywood or 1″ nominal boards and the overlay is at least 5/8″ exterior grade plywood. The 1/eight″ gaps are needed for expansion/contraction of the plywood.
A good rain on an open tile installation earlier than grout is put in can tackle a lot …