• Oct 23, 2025 Cementitious Screed A9 A2 Fl S1 Mapei Uneven Subfloors and Flooring Failures Uneven subfloors are a common nightmare for flooring installers and homeowners alike They lead to Uneven tileflooring installations Resulting in cracked tiles grout issues and an unprofessional finish Increased material costs More leveling compound or scr By Evelyn Batz