Many people think that cracks on tiles are directly related to poor quality. In fact, tiles are solid, inflexible flooring materials. Any cracks that appear on the tiles are caused by other issues.

Movement in the substrate can cause cracks to run in lines across multiple tiles. In this case, there are structural problems that need to be resolved. A temporary solution is the application of vinyl or carpet to hide the cracks, but the root cause of the issue needs to be fixed as soon as possible.

Generally allow two to three days for us to lay your floor and depending on the weather, allow another three days for it to cure and settle into its new surroundings. Read on here.

Causes include:

• Excessive movement in the substrate will cause a crack in the tiled surface that runs through several tiles in a roughly straight line.
• If the tiles are laid over a slab of concrete and a crack appears in the tiled surface, then that slab is moving and there is a structural issue.
• If the crack occurs at the meeting point between two slabs that were laid at different times, then there should be an expansion or movement joint at that junction in the substrate. Cracking here is due to that movement or expansion joint being carried through the tiles. 
• If the cracking occurs along the junction of two different surfaces, such as where a timber floor and a concrete floor meet, a movement joint is necessary and must be extended through to the surface of the tiles.
• You’ve seen concrete basement floors, driveways, or patios.  Chances are good that this concrete, if it is a few years old, has a long crack or two running through it. Even though concrete seems like the perfect substrate for tile, it too has its own problems.  When concrete substrate cracks, this is transmitted to the tile above in the form of a reflective crack. 

The form and positioning of cracking depends upon the building’s weak points, particularly around doors and windows and where floor and roof connect to walls. Other factors are the size, shape, and position of the crack, the age of the crack indicating repetitive movement, and crack widening suggesting settlement or support failure. Read this.

If the problem manifests as several cracks along roughly straight lines when over a concrete slab:

• The sufficient time for curing the concrete has not been met, (1 month per 25mm of slab thickness), or a suitable flexible adhesive has not been used. Shrinkage cracks may appear on the surface of the tiles.
• A ‘foundation rod stress’ could also be another cause of cracking. It can appear during the settling and curing process of the concrete. The cracking can appear in the tiles if the tiles were laid without suitable flexible adhesive. Remember that when using a flexible adhesive is used, the shrinkage, movement, and cracking can be more than that which the adhesive can handle.

If there are structural issues, or if movement joints were not extended to the surface through the tiling, it needs to be determined if the cracks are only on the surface and due to the slab shrinking and curing.

If the cracking is only superficial, the suitable flexible adhesives were not used. The tiles should be replaced and the proper adhesives must be utilized. To correct issues, the expansion joints should be brought to the surface of the tiles.

Severely damaged tiles have to be replaced and the movement joints should reach the surface. The same should also be done on old concrete slabs. Minor cracks can be easily corrected with the right coating or adhesives.

Additional reading:
Title:	HTML:
Tiles & Shower Water
Floor Tile Removal
Residential Floor Tiling
Residential Grouting	Check this Out!
Tile Repairs	Tile Repairs Common problems associated with tiled roofs are cracked and broken cement, or loose and broken tiles. This is likely to cause problems with wind and water damage, allowing the wind to loosen roof tiles and rain and water to seep in and through the gaps, which could cause thousands of dollars of water damage to your home, if not treated on time. Read on at http://www.roofdoctors.com.au/tile-repairs/.
Outdoor Floor Tiles