How to Prevent Tile Cracks

Tile cracks do not often occur because of the tile itself but because of the underlay underneath the tile. The underlay usually consists of wood or concrete and is used as a support. These are both strong materials, fit for the project, but both are prone to shifting after installation. Shifting then moves the tile causing it to crack. In order to prevent tile cracks, you must know how to install the underlay correctly and care for the tile after installment.

Things You'll Need

• Quality underlay
• Broom

Instructions

1. Lay down a quality underlay material. If you choose concrete, allow it to cure for at least 14 days, although 28 is optimum. Placing steel reinforcement bars in a grid pattern in the middle of the concrete slab will also help prevent movement and cracking. If you choose wood, make sure you have the right joint spacing or the wood may buckle, also causing cracks.

2. Level off the underlay--checking that there are no bumps or slopes. Any kind of bump will place stress on the tile and will eventually cause it to crack with use.

3. Clean the underlay before laying down the tile. Sweep away any dirt or other particles to increase the ability of the tile to adhere to the surface. Also, check for any old adhesive if you are using an old underlay and chip it away. Check for screws and nails left over from construction and remove them as well.

4. Lay down the tile over the underlay, ensuring that it fits snugly and is properly grouted. Any room will promote movement, which increases the risk of cracks.

5. Care for your tile--keeping it clean and protecting it from direct sunlight and excessive moisture. This will further prevent cracking in your tile from excess drying or leakage to the sub-floor.

References

• Schluter Systems: Position of Underlayment to Prevent Cracked Tile and Grout
• Ask the Builder: Ceramic Tile Crack Prevention
• Tile Magazine: Cracked Tile, Common Causes and Misconceptions