Cracked tile! Need advice!!

[dmlagunes]

I had ceramic tile installed and 6 months later I noticed cracks in about a dozen tiles. The cracks form 2 straight parallel lines 3 ft apart. The contracter says it is a high traffic area and the tile I chose was poor quality. The store says the tile is good quality and that it wasn't installed properly. Can anyone look at the picture and tell me what they think???

 

[Bathfix Bob]

I wonder if they were British ceramic? in which case not good quality.

 

[dmlagunes]

I wonder if they were British ceramic? in which case not good quality.

I don't know. They were purchased at a store called Floor and Decor in the US.

 

[angrypirate]

Even a bad quality tile, if installed correctly shouldn't really crack like this. Is it on a timber floor?

 

[Dave]

Is this a timber substrate floor?