Many projects today call for ever-increasing tile sizes, many of which are rectangular shapes such as 12" x 24", 18" x 36", 24" x 48" and larger, creating difficulties for the installer when bonding the tile to the substrate. Most times obtaining acceptable coverage on the floor is not as difficult since the installer’s weight can be used to help collapse the trowel ridges into the valleys while moving the tile back and forth, as shown in NTCA’s Trowel and Error video (https://www.youtube.com/watch?v=fNOjZrs5Xr4). However, when these same tile sizes are installed on wall surfaces, obtaining the required coverage becomes more difficult.
These larger tiles can be cumbersome to handle by one installer and can be challenging to move in the back-and-forth motion. The installation can be further complicated by the job requirement of narrow grout joints. These narrow joints do not allow the tile to be moved more than this width, which may not collapse the ridges.