0076 Roof Masonry Sidewall Flashings - Roofing - Roof Wall Flashings -

Image Text: Base flashings can be nailed to roof (preferable) or wall to allow for differential movement, but they should not be nailed to both > 3 inch overlap > counter flashing or side cap flashing - embed top at least 1 inch into chimney mortar and lap bottom over step flashing > step or base flashings > typically 9 inches