Tiles cracking in a long straight line

[happy501]

Hi everyone. I bought a home in Ballarat, Victoria in December last year. A long line of cracks have appeared from one wall to the other side in the tiles. I am worried thinking that it may be more than cosmetic. I have added some photos for you all to have a look at if you are kind enough.

Thank you

Chris

Untitled

• happy501
• 3 Mar 2014
• 1

Untitled

• happy501
• 3 Mar 2014
• 1

Untitled

• happy501
• 3 Mar 2014
• 1

 

[Dextraneous]

Looks like the timber (??) boards below it weren't solid enough to stop flexing.

 

[foxhole]

Underfloor heating?

 

[happy501]

Thanks for getting back to me. I wish it were timber underneath. It is a concrete slab. The house is 28 years old and did well in the building inspection when i bought it 3 months ago. Then a few week into having our new home the crack came out.

If it is just cosmetic i don't mind. If my slab is cracking then I may need to find a bottle of something to calm my nerves..