crack line through tiles

[reggell]

my tiles have a crack line directly on the joint underneath where the ply sheets are butted together. anyone know why?

[jay]

might be better if you can run us through the method of installation and a pic might help

[Dave]

my tiles have a crack line directly on the joint underneath where the ply sheets are butted together. anyone know why?

It could be a deflection stress crack or a lateral stress crack..

[Daz]

It sounds like poor prep work, but more info as Jay has requested will help us provide constructive advice.

[hillhead]

The dreaded ply strikes again, deflection again by the looks.

[peckers]

what ply was used, what thickness is it, whats it onto, how was it fixed/layed etc, more info please, oh and what tiles and addy too...

[faithhealer]

as above clive, more info

[doug boardley]

could be joist deflection (bounce) or expansion of your ply sheets if they've been hard butted up to each other instead of leaving a couple of mm "breathing space"

[jay]

could be a floating floor

[aph257]

Need more info Reg

[facetile]

All of the above and i bet that the ply is less than 15mm thick

[whitebeam]

What tiles were used