How does roof-to-wall flashing work?
Step flashing overlaps the roof covering along a wall; counterflashing protects the upper flashing edge. A valley carries water where roof planes meet, while penetrations use a compatible boot or flashing assembly.
What gets rebuilt during flashing repair?
The scope names covering to lift, flashing to replace or retain, adjoining wall material, and the restored water-shedding layers. GAF’s bulletin illustrates common details; the selected system instructions govern installation.
How are chimney and vent details handled?
Roof flashing addresses the weatherproof connection. Masonry, appliance, plumbing, fan, and electrical work can be separate trades. A plumbing boot fits its named product conditions, not every vent through the roof.

