the first floor, there were frequent dips and swirls up to 1/2”. On the second level, the concrete changed depth by up to 1-1/2” across a 6’ section. In addition, the many col- umns and curves added leveling complexity. After priming with TEC® Multipurpose Primer, YTT pumped new TEC® Level Set® 300 Self- Leveling Underlayment to cor- rect the variations. Josh Cohol, President of YTT, explained, “The new TEC Level Set 300 created as close to a perfectly flat surface as I’ve seen. We pumped the prod- uct and noticed its excellent flow ability to reach around the many columns and follow the curved flooring edges. Even applied at a depth of 2”, it was walkable in just a couple of hours.” Cohol appreciated frequent on-site sup- port from H.B. Fuller Construction Products’ Charlie Renner, Technical Sales Manager, and Ron Sheldon, Technical Services Manager. To mitigate concerns about cracks migrating up through the large, thin tiles, TEC® HydraFlex™ Waterproofing Crack Isolation Membrane was specified.YTT rolled on the membrane before trowel- ing on the mortar. For the larger expanses, TEC® 3N1 Performance Mortar was used. TEC 3N1 is a lightweight premium mortar with Easy Trowel Technology™ for supe- rior handling and extended open time – appreciated for large spaces and large tiles. The Global Learning Center’s round columns required challeng- ing radius tile cuts and a 17° angled TECH TALK –––––––––––––––––––––––––––––––––––––––––––––––––––––––––– TEC® Level Set® 300, even applied at a 2” depth, was walkable in just two hours. Youngstown Tile and Terrazzo spreads TEC® Level Set® 300 Self-Leveling Underlayment to level the many dips and swirls in the concrete in preparation for the large, heavy tiles. 62 TileLetter | May 2018