Problem area number 3.
Residential roof flashing details.
Flashing is installed to surround roof features such as vents chimneys and skylights.
Head flashings are used to direct water away from openings such as windows and doors.
Where a slope roof meets a sidewall slip the upper legs of the step flashing under the sheathing wrap see illustration.
Certain components as depicted in these details may not be provided by the roofing contractor.
Click to enlarge make sure the sheathing wrap overlaps all step flashings.
Roof flashing is a thin material usually galvanized steel that professional roofers use to direct water away from critical areas of the roof wherever the roof plane meets a vertical surface like a wall or a dormer.
All flashings must integrate with adjacent materials so water always flows to the exterior following the shingle principle.
Where snow buildup is likely add a wide band of peel and stick membrane lapped over the step flashing but under the sheathing wrap.
Drip edge metal valley flashing dormer chimney and kick out flashing shed water away from the connections between roofs walls chimneys and other building assemblies this collection of 18 articles animations and videos identifies the critical roof flashing areas illustrates durable roof flashing details and shows how to flash roofs right in the real world.
With self adhering membrane is suggested prior to installation of sheet metal saddle flashing.
Stepped flashing is used where a sloped shingled roof intersects a vertical wall.
Eave flashing based on the author s experience this is one of the most common residential roof flashing defects of all time.
