We have a '60s modern that we have been rehabilitating. I have some of the original plans, and they show stone facing under each of the windows. None of this was completed, and vertical board and batten was used instead.
The stone ledges are in place, inset from the plane of the rest of the wall, and the builder simply capped the top of the block foundation ledge with slate.
I read this thread that recommended using a 'weeping system' that would leave an airspace, use brick ties and weep holes at the bottom rather than a scratch coat/mortar to wall for stone.
For my purposes, the top of the stone would be at the bottom of the window ledge, so I'm assuming best practice would be to flash from under the window ledge and over the top of the stone.
As with the previous thread, I have standard 2x/plywood sheathing in the area where I would be working.
Four questions to begin with:
--Is this potentially a DIY project? (I have done ceramic/stone etc but not masonry) The area to be covered is 2 window areas (about 12' l x4' h)
--Is it possible to add rigid insulation over the sheathing with the brick ties nailed to studs and projecting through the rigid? (I see commercial construction where it seems like this is done.)
--Would 4" stone be a reasonable choice?
--How would you finish & flash the end of the stone where it meets the inset from the main wall? (this may require a picture)