mosaic

[bluemoon]

hi lads ,need your help again i'm afraid.I'm doing a wall which is to include a vertical mosaic panel 600mm wide .the problem i have is that the main body tile is 8mm thick and the sheet mosaic is only 3mm thick so by the time i have my adhesive behind from the wall to the face of the main tiles is 11 or 12mm, so how do i make the 9mm difference up. the wall is plasterboard unskimmed,i was thinking of building it out with rsf and leaving it a day to set before fixing the sheets to it or overboarding with sheets of 9mm plasterboard but how would i fix these because the boards are dot and dabbed to a solid wall. also ,how do i stop the sheet mosaic from sagging when moving them and waiting for the addy to set .cheers boys.

[david campbell]

pack out the area with some rapid-set then tile onto it or use some old thin tiles i.e 5/6mm then tile over

[timeless john]

Blue moon,

You could use 6mm Hardie backer board - its fully waterproof and you can stick it to the wall with fast set flexible adhesive to build up to your required depth for the mosaic to be level with your field tile. Job done!
John.

[doug boardley]

as Timeless John says for me. To stop mosaics (on a sheet) from saggig, I start from the top and hang them like curtains and use panel pins at the bottom of the top course of tiles on each sheet