First, choose your tile. I selected some rectangular, black, slate tile in the 4″ by 12″ size.
Next, choose the pattern. For this project we went with herringbone.
Determine the size of the pad. Ours needed to be 54 by 48 inches.
Cut the backer board to size.
Find and mark the center of the board (which would also be the center of the chimney), drawing a line from the back to the front.
Start at the bottom and work your way up, laying the tile.
Trace the first row of tiles in the correct position, and then butter that space and lay the tiles.
Set the tile at a 45-degree angle, using a speed square, with one corner touching the center line.
Add mortar to the backing board and to the tile using a trowel, then place the tile in place making sure it stays at the 45-degree angle.
Place the next tile under the bottom right corner of the first tile, placing spacers.
Continue spreading mortar and placing tiles with spacers. Ninety percent of this project was super simple. The hard part comes with having to make all of the small edge cuts.
To make the edge cuts, lay the tile down and mark where it needs to be cut using a straight edge. Cut using a tile saw.
Once the tile is in place and is allowed to dry for 24 hours, it is time to grout.
Spread grout on using a grout floater, and then wipe off using a wet sponge or towel.
Finish the edgest with some trim.
Measure each side and cut the trim on 45-degree angles with a miter saw so the corners would match up.
Paint or stain the trim.
Secure into place. We used an adhesive to attach the trim to the tile. To make it more secure, we added a few small screws to the corners.
Notes
How thick does a hearth pad need to be?
This could be directly related to code. Some places require a hearth pad to be as little as two inches thick, where others may require it to be four inches thick.