Hi , I am having Cedral Click installed on a wall that goes up to a terrace.
I was thinking of using a flat slate lintel/coping stone on top of the terrace wall but Cedral requires ventilation and a mesh profile so i am wondering how much of a gap under the coping stone I will need (10mm seems to be mentioned in the context of a soffit.) and also how much the coping stone should extend away from the wall to stop water ingress.....
any comments or advice ?