The original fireplace hearth and surround were brick. We decided to cover it all up with honed Montauk black slate.
The slab guys measure the existing hearth and check for levelness (it’s not level!)
The slab is laid on top of the brick. (You can see in this photo how the floor tips down from the left side of the hearth to the right side – they’ll accommodate that when the install the face slab).
They shim the slab so that it is level since the brick below isn’t perfectly level.
The edges of the slabs are mitered. In this photo, you can see how they install the side piece. It is cut larger than necessary at the shop. They then bring it to the site and scribe the bottom edge to the floor.
They tape all three side pieces in place and figure out where to cut them so they fit flush to the floor.
You can see here that the side piece is cut to fit. The front piece is still too tall – they will scribe that one next.
Here they fit the front piece in place.
They put a lot of super smelly adhesive on the floor and miters of the slab to hold it together.
Once the sides are in place, they use a disc sander to ease the edges so they are not sharp. This process reminded me of the dentist. As one guy sanded, the other stood over his work with a vacuum cleaner and sucked all the little bits of dust up.
They then use a finer grit sandpaper to hone the edge.
A view of the finished hearth.
Another view of the finished hearth. Bookcases will go on each side of the fireplace. Those will be installed next week. After they’re painted, the tile setter will cover the face of the fireplace with tiles to match the hearth.