National Tile Contractors Association www.tileletter.com November 2018 ON THE COVER: Custom Building Products Atlanta Falcons' Mercedes-Benz Stadium earns LEED Platinum with help from CUSTOM Tile Installation Systems Technical Feature: Multifunctional foam building panels offer a myriad of advantages to the tile setter Stone: Lack of weep holes, uncollapsed mortar ridges may cause stone darkening in showers