Roof Flashing Under Shingles

Open valleys have metal flashing to protect this critical area of the roof.

Roof flashing under shingles.

The flashing needs to be installed before installing the roof shingles the metal flashing is formed with a hook edge and cleated on 12 centers the flashing extends up the wall at least 4 the flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas. The problem is that the old flashing is nailed to the roof under the shingles. Step flashing is made up of each piece is slid under a shingle tab going up the roof. Badly corroded flashing will need to be replaced.

Nail the upper edges of the flashing to the roof sheathing where the shingles were removed with 6 penny. The existing flashing is sheet lead and dates to 1910. Unfortunately it has deteriorated and needs to be replaced. Flashing against a vertical sidewall shall be by the step flashing method.

Then replace and fasten the flashing and reinstall the shingles with the proper overlapping procedure. At the end of the vertical sidewall the step flashing shall be turned out in a manner that directs water away from the wall and onto the roof and or gutter. Position the flashing with the lower edges atop the carport roof panels along the transition. While some skylight manufacturers include flashing in their products sometimes roofing professionals.

Installing new shingles is a major investment for most homeowners so it makes good sense to take steps to protect the integrity of the roof for as long as possible. Have to pull some nails if the shingles are existing. Recaulk the joints between the roof and the 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.

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. The flashing shall be a minimum of 4 inches 102 mm high and 4 inches 102 mm wide. At the bottom of the roof water needs to be directed. It s much easier to reseal the flashing than it is to patch a water stained wall or ceiling.

To do this you will also have to remove several rows of shingles as well as the old flashing. Rain should run off the roof and into the gutter. Step flashing protects the gap where roofs meet walls by weaving into the roof shingles. Do a google and.

Also the flashing runs along the main part of the edge and extends about a 1.