Help please, tiles cracked/moving

[J Sid]

as Andy said, uncouple from the ply. Use a suitable adhesive and fix the tiles the correct way.
before the new ply is fixed, choose an adhesive you plan to use and fix ply as per there that companies instructions. Contact technical dept.

 

[Unused Account 1]

Use ditra on tiles,if bal came out and tileshevent been back buttered ,the blame is off them totally

 

[Balloo]

Here’s a picture of where the tiles have been lifted.

View attachment 106070

From what i can see the ridges from trowel have not even collapsed, its as though the tiler set the tile on the adhesive but didn't push it into the bed,, also the trowel he used looks about an 8mm trowel he should of used 15mm for a better contact,. But most importantly he should never have tiled on plywood as recommended by most adhesive companies.

 

[Andy Rhodes]

Glynn at tilemaster will tell you different Hsp101 flooring plywood (BS 8203:2017-Annex A is more than suitable to tile on

 

[J Sid]

Glynn at tilemaster will tell you different Hsp101 flooring plywood (BS 8203:2017-Annex A is more than suitable to tile on

it may well be if it's fix correctly as per BS
British Standard states
PLY
"The use of sheets and boards that are subject to movement from changes in moisture content should be avoided if at all possible."
"if sheet's and boards are not dimensionally stable with changing humility they should not used in wet or damp conditions."
"Tiles should not bridge joints in boards"
also
the lower face and edges of plywood should be sealed against the ingress of moisture using preferably non-aqueous sealers, e.g. polyurethane varnish, or styrene butadiene rubber, to prevent distortion by changes in atmospheric humidity before being screwed down.