He is using bal mosaic tile fix and a mosaic trowel.
How to fix glass mosaic wall tiles.
Mosaic wall tiles are popular because they are easier to work with than normal sized ceramic tiles.
Learn how to fix mosaic tiles to a wall.
To install glass tiles start by spreading the mortar on the wall in a 3 inch by 3 inch space.
To overcome the lack of rigidity we suggest mosaic support mesh.
It also helps build depth to bring the mosaics in line with any tiles.
This is a plastic self adhesive mesh which is simply stuck on to the back of any mosaic sheet.
All looked fine until he put the second sheet of mosaic above the first which then caused both sheets to sag.
He put the first tile in from the bottom with the bottom of the tile resting on a batten fixed to the wall.
Next push the tiles firmly into the mortar and continue applying the mortar and tiles in 3 inch by 3 inch spaces.
The mosaics are coloured glass with a fibre mesh back and are.
The readymixed adhesive grout will take ages to dry out on glass so you will get a lot of problems with the tiles slumping sliding down the wall i use bal mosaic fix which is a powdered adhesive that has a very bright white colour so if a bit seeps into the joints it won t show assuming white grout use a 3 4mm mosaic trowel as this will.
Weldbond glue when bonding glass tiles to a glass surface use weldbond sparingly if you require a crystal clear bond.
Adhesives clear drying glue such as weldbond.
How to lay mosaic tiles.
Then make straight parallel lines in the mortar by pressing into it with a notched trowel to help the tiles stick to the wall.
Make sure the glue will adhere to glass.