Posted By Joe_X on 12/31/2007 11:45 PM
Should I cut back my basement waterproofing to grade and cut some flashing into the foam to direct water over the basement waterproofing?
or will the cultured stone thinset / mesh base hold to the foam?
I had to tackle this same basic issue, but not exactly the same situation. Near the end of this thread I show what I did to shed water over the waterproof membrane. http://www.greenbuildingtalk.com/Forums/tabid/53/view/topic/forumid/4/postid/44303/Default.aspx
Take a look at it near the end to see a problem I had with the ICF foam to membrane transition and how I solved it. This won't work the same in your case but I think you'll be more aware of potential problems.
You might be able to lap the mesh for the stone over the membrane and build a mortar transition from the foam to the membrane. You'll want to fasten the mesh, or lath as the masons call it, for the stone to the ICF blocks with screws. It'll work good. You can take the stone all the way to soil, right?
Not that you asked about it but I'll get a picture in a day or two to show how I transitioned from Hardiplank siding to the stone. The mason who put up the stone was impressed.