Tiles Cracked in New Extension - Help Please !

[Julian 'Farmer' Bonsall]

Knowing the deflection would be useful and if its within the 1mm/3600mm span. Either the tile needs to be able to cope with the load from the flex or reduce the flex.

 

[Bill]

Those tiles are ceramic from British Ceramic Tiles.....

Another one bites the dust.

The tiles are not suitable for your project. Yes, the tiler could have laid cement construction boards on top of the chip board and that may have helped but the crack is mainly due to the tiles not being strong enough for flooring.

 

[Simon Dale]

I thought BCT listened to our comments ? Dont think so !!!

 

[DAK]

Those tiles are ceramic from British Ceramic Tiles.....

Another one bites the dust.

The tiles are not suitable for your project. Yes, the tiler could have laid cement construction boards on top of the chip board and that may have helped but the crack is mainly due to the tiles not being strong enough for flooring.

We sourced from B&Q - assume this means this is who B&Q bought from and they are not good enough for the job? Is there a different tile you would recommend? Brand or material or thickness?

Thanks for your help.

 

[Simon Dale]

Sorry for your problems. Tiles that cost £11.00 a box should be an indication of quality.B/Q probably have 100% mark up do the maths. You should use Porcelain, that can be around £20.oo mt

 

[DAK]

Sorry for your problems. Tiles that cost £11.00 a box should be an indication of quality.B/Q probably have 100% mark up do the maths. You should use Porcelain, that can be around £20.oo mt

Thanks Simon - understood. Does this also account for the grout cracking?

 

[Simon Dale]

Thats a different issue, things have moved IMO a lot

 

[Julian 'Farmer' Bonsall]

Understanding the deflection is important. The L/360 comes from 24" centre floors (I think) but L/720 is what I used for firming up my floors. If your span is 4m then thats either 11mm deflection or 5.5mm. I couldnt see the grout cracks in the photos.

 

[Spare Tool]

If you heat and cool wood it WILL move no question..

 

[Simon Dale]

Understanding the deflection is important. The L/360 comes from 24" centre floors (I think) but L/720 is what I used for firming up my floors. If your span is 4m then thats either 11mm deflection or 5.5mm. I couldnt see the grout cracks in the photos.

There is no grout as its moved so much. Look at first picture

 

[DAK]

There is no grout as its moved so much. Look at first picture

I think this picture is probably from a tile that was taken out to check underneath - hence the lack of grout. The second picture is more accurate - apologies if misleading. Was sent these pictures - I'm out at the moment.

 

[Julian 'Farmer' Bonsall]

I can see the grout cracks - zig zag from tile end to tile end. How much movement do you have?

 

[Time's Ran Out]

The issue you have here is the tiles!
Ceramic tiles are not suitable for this floor construction and your tiler should have made you aware of that!
As per @Tom Astley if they are indeed BCT (as I assumed ) then it’s just another case of materials being not fit for purpose.
A porcelain tile may have given you a better job but only a time served professional would understand the substrate preparation suitability.
There is a thread on here regarding BCT tiles do add your comments.

 

[Julian 'Farmer' Bonsall]

The grout has also failed on the opposite rows to the tiles. Would this not suggest the floor has excess movement?

 

[Ajax123]

120cm apart cracks suggests along the joints in chipboard rather than joists which would be maximum 60cm apart but mior like 40.