Residential Roof Flashing Details

Where a slope roof meets a sidewall slip the upper legs of the step flashing under the sheathing wrap see illustration.

Residential roof flashing details.

The defect consists of the improper integration of the roof underlayment and the metal drip edge collectively referred to as the eave flashing figure 13. Problem area number 3. 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. Stepped flashing is used where a sloped shingled roof intersects a vertical wall.

Click to enlarge make sure the sheathing wrap overlaps all step flashings. Common flashing details step flashing. Certain components as depicted in these details may not be provided by the roofing contractor. Head flashings are used to direct water away from openings such as windows and doors.

Eave flashing based on the author s experience this is one of the most common residential roof flashing defects of all time. Pre flashing the coping to wall termination with membrane flashing e g. With self adhering membrane is suggested prior to installation of sheet metal saddle flashing. Where snow buildup is likely add a wide band of peel and stick membrane lapped over the step flashing but under the sheathing wrap.