

Hi everyone,
I have installed a French Drain around the outside of the garage ( see pics ) and it works well but now I need to waterproof the joint between the concrete slab and the hardiplank wall.
My problem is the blue metal keeps sliding down the slope and up against the wall which I’ve been told by a tiler will be a problem with the waterproofing.
I didn’t want to remove all the soil as if is supporting the fence.
I am hoping someone can suggest a solution to retain the stones and stop them from sliding down.