Abutment (top or side)
Where a roof meets a wall or other vertical projection, such as a dormer or chimney.
An abutment at the top of the tiling is referred to as a top abutment. Top abutments are finished using a lead cover flashing. Ventilation can also be included at a top abutment.
A side abutment is where a roof verge meets a wall that rises above the tiling. Profiled tiles can be weather proofed using a cover flashing. For flat tiles a secret gutter should be used and for double lapped tiles and slates, soakers should be used.
Photo shows a roof with top abutment at the dormer window and side abutment at the wall.
