Installing slate 12x12s over brick hearth wall [Archive] - Ceramic Tile Advice Forums - John Bridge Ceramic Tile


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06-30-2008, 11:32 AM
Hi, we are replacing a wood burner with gas stove and are covering both an existing "L-shaped" brick wall and newly-built hearth floor comprised hardi-backer over wood subfloor with 12x12 slate tiles (Home Depot's Hampshire slate which is variations of gray colors). Total size of the project is only 100 sq ft. So, here are three questions: 1. We'd love to butt tiles in a staggered pattern and not use grout (saw slate tiled walls in restroom of a restaraunt and it was such clean look). Since it's a wall and the hearth floor not going to be walked on am not concerned with spaces around the tiles trapping dirt. Any other issues we need to be aware of? 2. Any difference between installing tiles vertically (over brick) and horizontally over hardi-backer? 3. Would like to leave tiles natural (not use sealer); since we don't plan on using grout there shouldn't be a clean-up issue. Would love any feedback, thanks. Harriette

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06-30-2008, 11:54 AM
it would be best to flat trowel and smooth out the brick prior to tile install.

06-30-2008, 01:50 PM
Unless the brick is painted, spalled or heavily covered with soot. If painted, the paint needs to come off. Soot can be cleaned with detergent and a stiff brush. Spalled or painted bricks need to be covered with metal lath and a scratchcoat of brick mortar.

For a no-grout look, you gotta have a few things working for you: 1) The tiles must be accurately sized. Home Depot's stuff doesn't have a good reputation in that department. 2) The surface must be flat. If you skim coat or scratch coat, that'll be up to you as how flat you can make it. 3) The surfaces must be plumb and square. If not, your joints will be off whack by the time you get to the top.

Have you wet a piece of this tile? You may like the look better than the natural matte finish. Or maybe not.