cracked wall tiles in en-suite

[axel]

hello, I asked about what the partition walls are made of... Structure of wall which was tiled - original solid 6'x2' timber partition ..plasterboards have been fitted by wood screws on to....plasterboard sealed by PVA.. Tile adhesive used - mapei wall tile adhesive..ad flexible grout...


I measured the distances of the fine vertical lines on the bedroom wall and they are .. 98 cm, 102 cm, 99 cm and 100cm apart.