Help on Setting Out

[Tadpole]

Hi there, this is my first post and looking for advice on fixing 550x330x8mm ceramic wall tiles to two bathroom walls. I have started the short wall in the shower enclosure and seems to have gone ok. Have just set the first tile to continue around the corner to cover the longer wall (3metres). Looking at the edge of this tile I have a total thickness including tile of about 13mm. Is this ok for bed thickness? The walls are plasterboard and have had two coats of tile primer. As these are larger tiles, I am using levelling wedges as well as 3mm spacers. Any tips would be appeciated, Thanks.

 

[J K Tiling Cornwall]

A 5mm bed depth doesn't sound too excessive. What kind of adhesive are you using? On the external corner was it the finished edge of the plasterboard? Was it tapered edge board? Will usually have TE on the side. A pic would help. Cheers