How To Flash A Metal Roof Dormer

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.

How to flash a metal roof dormer.

Lay a bead of roofing cement along the shingles just below the dormer and bed the metal base flashing into it. Since most ordinary homeowners do not have all the necessary know how or significant knowledge of basic roofing principles along with experience of working on an actual roof all day in the sun with the sweat pouring down the face as you work on flashing all the dormers chimneys and roof vents or shingling away for hours on end and doing it right taking on the installation of a metal roof. Two ways to flash roof edges protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. One common method is to lay the edge metal under the eaves membrane and over the rake details concrete masonry roofing wrb flashing.

For photos and the four steps to flash a dormer click the view pdf button below. This video shows how to install endwall flashing with standing seam panels. The video features union s advantage lok ii standing seam roofing panel which is. 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.

Remove the paper from the first piece and press onto cheek membrane piece. Both the peel and stick membrane and the underlayment should extend up the wall higher than the vertical leg of the step flashing. 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. 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.

3 install roof shingles to the base of the dormer notching around the corners as needed.