In the back of my house I have an addition that just sits on a perimeter foundation (no basement). I've got some moisture problems and some grading issues, so I'm putting a french drain around the foundation.
I'm trying to dig down about 24" or so below surface (36" or masonry exposed). My plan is to repair the masonry, apply asphalt sealant, layer of 8mm plastic, and then thr french drain (garden fabric, #4 stone, 4" perforated drain pipe w/sock, 1:100 inclination).
When digging, I got to the door and realized that the concrete transition at the door opening appears to be poured and overhands the cap of the foundation by 6-8" (see photos). I'm thinking it's not safe to remove it and I'm going to have to leave all the dirt and soil around and near the door and come out a foot or two. This means I can't deal and plastic there like I wanted. Is this my only option?