Some products are designed specifically for use between tile and plaster walls but any tile setting adhesive designed for thin set use will work.
Securing heavy stone tiles to plaster walls.
Hi the maximum weight limit for tiling direct on to plasterboard without skim is 32kg per sqr mtr using stone or in your case slate maximum thickness of 10 mm this includes adhesive.
The surface of a plaster wall is too smooth for the cement to grip to.
450mm x 450mm tiles.
Home centers and tile shops carry a huge selection of marble limestone and granite and the installation techniques are virtually the same as for ceramic.
Stone tiles on a skimmed plaster board wall.
A glue adhesive works better for installing tile over plaster.
Add the elegance of natural stone to your bathroom walls for little more than the cost of standard ceramic tiles.
The maximum weight of tiling which can be supported by a dry well adhered plaster background is 20kg m.
Install ply on top of your wall.
Fit the item to be anchored over the bolt then insert the toggle and tighten.
Bore a hole in the wall large enough to accommodate the toggle.
The only special tool you need is a wet saw with a diamond blade.
How to hang things on a stone wall.
This is equivalent to ceramic tiles with a maximum thickness of 8mm plus tile adhesive or natural stone tiles with a maximum thickness of 7mm plus tile adhesive.
Just please bear in mind they are not 100 accurate either.
So make a small whole on both side of potential stud just to be sure.
Then the next step would be to add an extra piece of 12 mm plywood on top of your wall attached to the studs.
If you do not know how it has been done you can give a go with stud locator.
For something especially heavy like a wall hung vanity she recommends having the wall built with a layer or two of plywood before putting on a layer of hardy board and then tile the wall this.
Plastic versions hold medium loads in drywall and plaster.