I've got my foundation covered below grade with 2" XPS foam with a dimple membrane over that. I plan to go up to my siding with more XPS above grade and then cover it with some sort of parging or stucco (I guess the first question is what's best to use???). Now I was looking at my window openings and wondering how to mount my wells. I have wedge bolts I was going to drill in and mount with them but do I go through the membrane and XPS or do I cut it out and mount directly to the concrete. Maybe I should wait and mount them outside the finished wall???? Anyone have pictures? Thanks, Sean