The membrane will allow for 1 8 inch movement parallel to the membrane without cracking the tile.
How to stick tiles to brick wall.
Compared to wood or tile though they can be pretty difficult to stick things to.
Ensure that all loose debris is removed as well.
Create a smooth surface for the slate tiles to be set on by covering the brick wall with a layer of thinset mortar.
If you don t want to go to all that work and merely want to stick something to a brick or to a brick wall you will need a strong adhesive.
Spread the mortar onto the wall with the flat edge of a trowel.
The most common method for attaching something to a brick wall is to drill into the brick itself and insert a hanger.
Next cover the entire tile with mortar and use the notched trowel to make ridges in the mortar before applying the tile to the wall.
If it moves push on it a little harder.
If you are less confident in the wall s stability then i would suggest a tile membrane and use an exterior rated thin set for both sides of the membrane.
Press the tile in place firmly and use tile spacers to keep the joints even.
Place a tile in position on the wall and press it into the mastic.
Press the tile in place and make sure that the joints are kept even.
Cover the first area with tiles by covering the brick with mortar using the shelf you constructed for dry fitting the tiles.
Next remove any loose mortar and paint that may be on the wall and then rough up the bricks so that the tiles will stick better.
When you release pressure it should stay where it is.