Tile Bedding Material

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Defect and Repair

Tile Adhesive Defect & Possible Causes

(related to bedding material)

Repair
adhesive_defect1  Adhesion failure

  1. Inadequate provision of expansion or control joint
  2. Incompatible stone and bedding material
  3. Concrete or cement/ sand screed not properly cured and drying shrinkage cracks occur after stone installation
  4. Substrate not properly cleaned & prepared.
  5. Contamination of the back of stone tiles by dust and dirt deposited.
  6. Incorrect installation of stone tiles. E.g. insufficient tapping of tiles into position or tiles were applied onto adhesive layer after the “open time” lapsed.
Hack off the affected area and re-tile
adhesive_defect2 Hollowness

  1. Air entrapped or void in either setting bed or slab, causing one part of the floor to sound differently than another.
  2. Separation or waterproofing membranes installed between a slab and bedding material
Hack off the affected area and re-tile
adhesive_defect3 Efflorescent

  1. Salts within stone and/ or bedding material
  2. Moisture getting into adhesive from under the floor or through tile joints
Hack off the affected area and re-tile

Temporarily, can be cleaned using a proprietary tile cleaner, but the problem will be occur again.

Always check the compatibility of cleaning agent with the tile material.