I have a 18′ x 6′ concrete slab floor to a covered front porch. The slab (about 6″ thick) was poured on top of cinder block foundation walls and I assume has gravel beneath it. The slab has 2 small cracks the run across the slab (so ~ 6′ long each). Over the 13 yrs Ive lived in the house, one crack has expanded about 1/16″.
I’d like to tile the slab with slate and was thinking of trying to stablize the slab like this: tapcon 3 -4 simpson ties across each crack, to kind of stitch the cracks together and keep them from moving. Then, about 18 -24″ away from each crack, cut a new expansion joints in the slab where a grout line in the tile would be so I could control the appearance of the crack a bit better, with color matched acryllic grout/caulk.
Or is that just crazy talk?