Tiles may move during the curing phase if they are disturbed by traffic or if the mortar mix was too thin. When a tile is placed, it requires time for the initial chemical cure to hold the weight. If the mortar is improperly mixed or if there is excessive movement in the subfloor before the mortar has hardened, the bond will be compromised. Keeping the area restricted from traffic is the primary way to ensure tiles remain in their set position until the mortar has reached structural strength.
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What causes tiles to shift or settle during the mortar curing period?
Tiles shift or settle due to premature foot traffic, improper mortar consistency, or failing to let the mortar reach its initial set. Additionally, environmental conditions that cause the mortar to dry too slowly can result in tiles sinking into the bond coat.