Apply a suitable 12mm plasterboard using a dry lining method using a dry wall adhesive.
How to tile over brick wall.
Adhesives and primers may fail as a result of bonding to an unstable material.
Use a flat trowel to spread thinset over the brick filling in the grout lines.
Go over the entire area with a wire brush to dislodge any loose mortar then scrub off the soot with a rag soaked in white vinegar.
Cover the hearth with a drop cloth and remove the mantel and anything else that s attached to the brick.
Ensure that all loose debris is removed as well.
Cover the first area with tiles by covering the brick with mortar using the shelf you constructed for dry fitting the tiles.
If the grout lines are still visible after the first coat has dried apply a second coat of thinset to smooth out any dips or grooves.
The first step is to remove any existing trim or moulding from the wall as you won t want to tile over them.
Allow the thinset to cure for 24 hours before tiling.
Press the tile in place firmly and use tile spacers to keep the joints even.
Use the flat side and edge of the trowel to smooth the thinset eliminating any ridges or bumps.
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.
Using a trowel spread an even layer of thinset over the bricks.
Steps for tiling over a brick fireplace.
The thinset will cover the bricks and mortar and provide a flat smooth surface for tile installation.
Allow the second coat to cure completely.
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.
How to tile over a brick wall option 1 dry lining.