Porcelain tiles cracked

[Cheryl]

Hi
The longest run is just over 11x600mm tiles so just over 6.6m long (this length of run is in three directions) - about 58sqm in total.

 

[Stewart]

Could you please post some pics showing the tiled room, we don't really need to see the cracks....

 

[DHTiling]

6.6 lnr mtrs is just about ok... i still think it is stress related.. you have the option to leave it to see if it gets worse and then rectify or remove and see what is causing it..

 

[Cheryl]

I'm so sorry, I'm really not good at this and can't seem to attach the photos I have taken.
I was wondering if the L shaped cut had created a weakness in the tile that has taken time to become evident. I have tried knocking the tiles and there is no hollow sound at all and there is certainly no flex.

 

[DHTiling]

you upload pics using the attachments feature is post rely advanced.. http://www.tilersforums.com/newattachment.php?do=assetmanager&values

 

[Boswellnick]

Might be far fetched here, I have been tiling in Sweden for a long time and out there they recommend a minimum of 6 weeks before turning on floor heating..

 

[Cheryl]

Hello again,
By the way, thank you so much to everyone who is trying to help with this. At first I thought it might have something to do with the underfloor heating but the heating mats are about 30cms from the perimeter of the room and it is there (on the L cuts) that the cracks are. There are no cracks anywhere else (yet). Could the tiles be at fault or could the tiler have created weaknesses when cutting? I really don't think it is stress related (because not tiled up to edges) and absolutely no flex in floor. Where tiles are cracked, they have not lifted, it is literally a fine line from each right angle of the L cut.

 

[DHTiling]

The L-cut is the weak point and expansion stress in the floor may cause them to break at this point... your option is to replace and hope that it was just the initial warm up that has done this and might not happen again.. but without seeing the floor at face value then we can only summise..

 

[Stef]

Hi,
Is this a new build house? Is it a new conservatory? How old is the concrete floor & how thick is the ply overlay?

 

[John Benton]

If it is only on the L-shaped tiles with the cut-out, are the location of these tiles at a corner where the skirting board is, or are they at the corner of the end of a run of kitchen base units? Are the kitchen units fitted on top of the tiles or are the tiles fitted around the end panels? I'm asking because if the tiles are scribed around decor end panels it could be movement here that could be causing contact with the tiles, and in turn causing them to crack other than movement in the floor. Locations of cut tiles would help.

 

[Cheryl]

The location of the cracked tiles is only on corners where the skirting board is. The whole floor was tiled before the new kitchen was installed and nothing is cracked under or around the units. The house is not new (1930's) and the conservatory is 8 years old so no movement there, I don't think.