filleting
Isaac Kremer/ January 14, 2018/ / 0 comments
Material, such as mortar, used as a substitute for flashing, at the meeting of a sloping roof with a wall. The mortar is carried up the side of the wall and over one of two courses of slates or tiles, the next course lapping over it. It is very liable to leaks from settlement and from loose slates. (Sturgis, 1900)