ed to have the floors and some vertical spaces dressed in tile and stone. CJK Design Group specified large-format 24” x 24” (61 x 61 cm) and 12” x 24” (30 x 61 cm) porce- lain tiles from Daltile’s Diamante, San Michele and Continental Slate series for the narthex, nave and sanctuary. But when the church was built eight years previously, the floors were finished in polished con- crete that produced a nonporous, sealed surface that did not offer the proper finish for the installa- tion. Traditional shot blasting could not be used for surface preparation because of the deleterious effect that it could have on the painted frescoes and delicate icons, which were created with a centuries-old process using egg tempera paints. Innovative technology produced a solution that circumvented tradi- tion and provided a breathtaking foundation to anchor the beauty that lines the walls and ceilings of the narthex, nave, sanctuary and ambulatory at Holy Trinity. Preparing the subfloor Installers from Indianapolis- based Starnet contractor Certified Floorcovering Services (CFS) used MAPEI’s ECO Prim Grip primer to cover the polished concrete sur- face, eliminating the need to shot blast and potentially damage the church’s painted treasures. Next, the crew tested and used Ultraplan LSC – a MAPEI self-leveling liquid LARGE-FORMAT TILE –––––––––––––––––––––––––––––––––––––––––––––––– MAPEI Ultralite™ S2 is a pre- mium-grade, lightweight, single- component, thin-set mortar that is ideal for thin-tile applications. This high-performance, highly- deformable, polymer-modified mortar is formulated with Easy Glide Technology™ for ease of application. MAPEI Ultralite S2 features a long open time, extended coverage and superior transfer properties to enhance back-buttering, which is ideal for thin porcelain tiles as well as ceramic tiles and stone mate- rial. MAPEI Ultralite S2’s unique Ultralite Technology™ provides twice the coverage of a stan- dard thin-set mortar per pound/ kg and is TCNA Green Squared Certified® for use on sustainable projects.www.mapei.com 88 TileLetter | January 2018