Calibrated tiles

[londonsurf]

Hi

I recently purchased 600x300mm 'calibrated' slate riven tiles. On receipt of the tiles, I note they vary in thickness from 5 to 15mm. My tiler has refused to lay them.

Please can you advise me if there is a British Standard that defines the term 'calibrated tile', and if so what it says. The tile supplier has said to me that calibration does not relate to the thickness of the tile, but its dimensions in plan form i.e. as long as the plan dimension is a consistent 600 x 300, then I have no case. Is this true?

Please help.

 

[tommyzooom]

Thats not what I would class as calibrated slate, I think the supplier is trying it on

 

[londonsurf]

They are absolutely shocking tiles - but I need to find the 'legal' definition of a calibrated tile, before I take the supplier to the cleaners!

 

[The Legend; Phil Hobson RIP]

I think the true definition of calibrated slate should mean even thickness and size, but I just Googled it and it seems some just calibrate the base of the tile, leaving a riven finish on the top.

That said I have used this type of tile very often, and if you grade your tiles in order of thickness, you can achieve a good result

 

[Stewart]

Calibrated slate from my store is based on the thickness of the tile....

 

[Gazzer]

Had a similar issue recently where the measurements were the same as your but also the tiles were different sizes. this made the 3 sizes unable to form the correct modular pattern without one joint being 10mm bigger than the others....Client wouldn't accept this of course so they were sent back.

 

[Ian]

I'd always class the calibration as the thickness.

 

[peteablard]

As phil says, an experienced tiler should still be able to lay these correctly however extra adhesive will be required!

 

[Gazzer]

I personally think it should be calibrated length, width and thickness. Thats what calibrated means to me.

 

[The D]

are they bad for size other than the thickness? as phil has said they can be fixed to a good standard by grading the tiles and starting with the thicker ones and then working to the thiner ones. *