Which backing for tiles?

[alba2]

We are in a new build timber frame property. There has been movement and the shower room walls have settled and the tiles have cracked along grout lines in 3 places from floor to ceiling.

The builder will soon be tackling the problem. I am concerned that once the tiling has been re-done over green plasterboard, it can happen again.

I have thought of replacing the plasterboard with marine ply then tiling on top. Would this cope with any further settlement? Alternatively I have thought about cement panels. Would they be any better?

As tilers what would your advice and strategy be in this situation?

 

[PrenticeBoyofDerry]

Why would you think marine ply and cement boards would not move during settlement, when plasterboard would?

 

[alba2]

I can't verify it without removing the wall tiles but I assume the plasterboard has sheared behind the grout line. My reasoning was that marine ply should obviously be considerably stronger and hopefully not shear.

Do you have an alternative solution to the problem?

 

[PrenticeBoyofDerry]

I would be happy with PBs, if you did have any more movement ply is not going to counter that and your tiles will still move and grout lines crack.

I am not saying don't use ply/aquapanels, just it is not going to save the day, if you have continued settlement.

 

[alba2]

OK thanks for that