Back-buttering involves applying a thin layer of mortar to the back of the tile itself in addition to the mortar applied to the substrate. This technique is vital for large-format tiles, which are more susceptible to voids due to their size and occasional slight bowing. By applying mortar to both the substrate and the tile, installers maximize contact surface area, which is essential for ensuring that the tile adheres firmly across its entire back. This method is also recommended for tiles with deep grooves or uneven back surfaces that might not otherwise make full contact with the troweled mortar bed. While back-buttering adds labor to the installation process, it is a proactive step that significantly reduces the risk of bond failure and tile breakage. Professional installers often view this as a standard procedure for high-quality work, ensuring that the finished installation is not only aesthetically pleasing but also structurally sound for years to come.
Key considerations
- back buttering tile
- large format tile installation
- mortar bond
- large-format
- porcelain
- stone