Roof Flashing Under Shingles

Get the real story about drip edge placement.

Roof flashing under shingles.

Flashing is generally installed at any joints or edges in the roof where water could otherwise work its way in. Step flashing protects the gap where roofs meet walls by weaving into the roof shingles. Also the flashing runs along the main part of the edge and extends about a 1. It looks like you re trying to do the flashing in one piece and that s asking for trouble.

Typically flashing is installed using roofing nails and roofing cement. Position the flashing with the lower edges atop the carport roof panels along the transition. Step flashing is made up of each piece is slid under a shingle tab going up the roof. In order to properly install new flashing you ll have to remove the shingles surrounding your old flashing and then re lay them after installation.

Don t mistake this condition for headwall flashing routed beneath the shingles and call it a defect. Drip edge metal valley flashing dormer chimney and kickout flashing are types of roof flashing that shed water away from the connections between roofs walls. One common method is to lay the edge metal under the eaves membrane. Fasten loose nails and cover exposed nail heads with roofing cement.

Nail the upper edges of the flashing to the roof sheathing where the shingles were removed with 6 penny. The problem is that the old flashing is nailed to the roof under the shingles. 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. The correct way to flash at the shingles in the area you indicated is using step flashing.

This is what i like to see for square flashing there is a better circular flashing ecrofutt erby crofutt june 17 2009 1 55pm 7. As seen in m. Look for loose nails and any damage to the seals at the edges of the flashing. Does the drip edge metal go under the tarpaper ice and water shield or underlayment on the eave.

Unfortunately it has deteriorated and needs to be replaced. Flashing should overlap the roof covering material but on asphalt shingle roofs for aesthetic reasons the part of the headwall flashing that extends down over asphalt shingles is often covered with a course of shingle tabs. With that type of flat edge flashing the shingles should have overlapped 2 additional courses until they reached the lower edge of the flashing or at least past the penetration of the roof sheathing. Flashing is installed to surround roof features such as vents chimneys and skylights.