How To Flash A Metal Roof Dormer

Remove the paper from the first piece and press onto cheek membrane piece.

How to flash a metal roof dormer.

So a cable company hole in the roof and improper flashing were working together to let moisture inside but what causes the major leak during heavy snow and ice. The mosby consultant crawled into the attic area and in the corner where the leak started there was no insulation in the dormer wall shown above that was installed 30 years ago. Reach under the roof overhang and lift up the edge of the first piece of membrane and slide the cheek piece under the first piece of membrane. This video shows how to install endwall flashing with standing seam panels.

For photos and the four steps to flash a dormer click the view pdf button below. Lay a bead of roofing cement along the shingles just below the dormer and bed the metal base flashing into it. Flashing a dormer in prattville al. 3 install roof shingles to the base of the dormer notching around the corners as needed.

Both the peel and stick membrane and the underlayment should extend up the wall higher than the vertical leg of the step flashing. One common method is to lay the edge metal under the eaves membrane and over the rake details concrete masonry roofing wrb flashing. Because this type of metal flashing can t be soldered making a leak proof joint where the flashing turns the corner at the bottom of the dormer called for special attention but i have a detail that handled the situation nicely. Slide the membrane up the roof along the wing wall placing it so that the half with the release paper is on the roof.

Jeff haddock technical representative at aep span fontana calif believes dead valleys dormer valleys slope transitions field fabricated roof curbs odd shaped or oversized roof penetrations large sheet metal crickets and ridge hip intersections are among the most difficult conditions to properly flash for weathertightness preventing these conditions is extremely difficult as most.