![]() The width also varies but should always be wide enough to cover 4" of the base flashing. The length of each piece of cap flashing varies with the pitch of the roof no step should be more than 3 bricks high. The one piece cap flashing is inserted into a reglet and held by lead wedges. The base flashing extends a minimum of 4" up the wall and onto the roof. ![]() The lower edge is held 1/2" above the butts of the succeeding course. The upper edge of each flashing piece extends 2" above each course of shingles. One type uses pieces of copper base flashing installed with each course of shingles. There are two approaches to stepped flashings. The details shown concentrate on such chimney flashings, but apply to other wall conditions. A typical occurrence is where a brick chimney rises above a roof. Description: Stepped flashing is used where a sloped roof meets a masonry wall.
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