Tile Redi. Make shower niche installation easy with Redi-Niche pre-formed niches. Ready to receive ceramic, porcelain, glass, or natural stone tiles, Redi-Niche units are simply installed between studs and screwed into place, eliminating the need to create niches from tile backerboard. The plastic construction helps inhibit mold and mildew growth by reducing the threat of moisture penetrating the finished tilework. Four standard Redi-Niche sizes include 16 by 20, 16 by 14, and 16 by 16 inches, as well as a 16-by-20 double-niche option. Additional sizes are forthcoming. 800.232.6156. www.tileredi.com.