Large-format tiles require heightened attention to installation standards compared to smaller tiles. A very high-quality subfloor is required, as even minor unevenness will result in "lippage," where one tile edge sits higher than the other. Installers must use large-format mortar designed to support the heavier tiles without sagging. Additionally, a mechanical leveling system is often used to ensure surface continuity. Complete back-buttering—applying mortar to both the substrate and the tile back—is necessary to ensure 95% contact.
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What installation factors specifically apply to large-format tiles?
Large-format tiles require specific mortar coverage, specialized leveling systems to prevent lippage, and extremely flat substrates. Due to their size, these tiles are prone to cracking if the substrate has any voids, requiring complete back-buttering for maximum contact.