What is the purpose of back buttering tiles?

Back buttering tiles serves the crucial purpose of increasing adhesion and ensuring full coverage of the tile surface. When tiles are back buttered, a layer of thin-set mortar or adhesive is applied to the back of the tile before it is set in place. This technique helps to create a stronger bond between the tile and the substrate, which is essential for the durability and longevity of the installation.

Full coverage is vital because it minimizes the potential for air pockets and voids beneath the tile, which can lead to issues such as cracking, lifting, or water damage over time. By ensuring that a sufficient amount of adhesive is in contact with both the tile and the substrate, back buttering enhances overall stability and prevents detachment.

In contrast to the other options, back buttering does not directly relate to the aesthetics of the tile, filling joints, or adding weight. While aesthetic aspects might be considered during a tiling project, they are not the primary concern of back buttering. Filling joints efficiently pertains more to the grouting process rather than the initial adhesion of the tiles. Additionally, back buttering does not inherently add weight; its main function focuses on creating a robust and reliable bond for the tiles.