We are tiling our front porch (11'x18') with a pattern of 6x6, 12x12, and 24x24 slate from Home Depot. We have 3/4" plywood on 12" centers I think. I'm going to lay down 1/2$" backerboard and a layer of Ditra. The porch is covered, but the sides are open, so it will get wet and some snow.
We live near the southern part of Va and temps are already starting to dip near the 30's at night. I was planning on sealing the stone with Quikrete Natural Look Waterproofer:
We got the slate in and they are generically labeled "Premium Natural Stone - Gauged Classic".
On the 12x12 slate there is a big sticker "Non-Frost Resistant Slate".
So I'm starting to worry that I may be heading down the wrong path. I see people using slate all the time for outdoor projects.
Did I simply pick the wrong type of slate? Should I stop now and select another type?
With proper sealing, should I be ok?