Back-Butter the First Tile

What happens here

Before placing the first tile, apply a layer of thin-set mortar to its back surface using a trowel. This technique, known as 'back-buttering,' ensures maximum contact and adhesion between the tile and the wall, which is especially important in wet environments like a shower niche to prevent water penetration and tile failure.

Goal: Apply thin-set mortar to the back of the tile for enhanced adhesion.