HI.I have to tile above a window and want to know how they are held in place while the adhesive sets.There isn't a window frame to reat the tiles on.I hope this makes sence

HI.I have to tile above a window with nothing underneath to support the tiles.How do u do it
?

You have to either use a very sticky adhesive and too much of it which will slow down drying times or use a couple of bits of wood to form a shelf-like effect for them to sit on with the weight then being held by the window sill.

Hope this helps and is not too late.

use palace supergrip

Thats good advice Calculator as this is a VERY GOOD non slip adhesive.

palace supergrip the best they is

Screw A Piece Of 2x1 To The Underside Of The Window Reviel But Make Sure Its Level Let The Timber Stick Out By 3\4 Of An Inch Which Will Hold The Tile
Until Dry

I use a good quality masking tape, a strip either side of the tile