Lightly dampen mat tiles with clean, cool water but leave no standing water in the open joint space. With a rigid sharp-edge rubber float held at a 45° angle, force grout diagonally into the joint, ensuring that the grout is well-compacted, free of voids and pin holes. The grout should be finished evenly to the base of the cushion or bevelled edge. Remove excess grout through successive diagonal passes using the edge of the rubber float held at a sharp 90° angle.
Allow grout to harden for about 10 to 20 minutes. Using a slightly damped cellulose sponge, loosen up all excess grout over the tile with a circular motion. Do not add water before everything is well loosened up. Clean the sponge, and then while slightly damp (not wet), gently wipe excess material from the surface using light and delicate diagonal passes.
Change water and rinse the sponge frequently. Keeping the water and sponge clean will achieve better joint uniformity and allow rinsing off the residue from the tile more efficently only leaving a small trace (i.e., a very thing film)
Wait at least 20 to 30 minutes before removing the final haze from the tile or stone surface with a slightly dampened white scrubbing pad or a microfibre towel.
Important: Do not let water sit on top of grout joints as it will interfere with the final clean up and curing, thus causing poor results.
Notes: After 24 hours, cleanup becomes very difficult. If a light film remains, it can be removed with a microfiber cloth using the palm of your hand or a white scouring pad (applying only light pressure) after lightly misting the tiles with a household glass cleaner. Carefully avoid contaminating the grout joints.
EXPANSION JOINTS AND CONTROL JOINTS
Install control joints where tiles abut restraining surfaces, around the perimeter of the work and at the base of columns and curbs. Install and space expansion and control joints in all directions in accordance with TTMAC Specification Guide 09 30 00 Detail #301-MJ recommendations.
CAUTION: Do not cout expansion joints in after the tiles have been installed. Install tiles normally and stop when the control joint location is reached. Cut the tile if required and resume setting from the opposite side of the joint. Before proceeding further, rake the joint and leave the tile and joint space clean. Do not fill expansion joint space after tiling is completed on the remainder of the job. Install a suitable industry-approved compressible bead and flexible sealant to caulk expansion and control joints.