How To Flash A Metal Roof Dormer

Step flashing on roof peak.

How to flash a metal roof dormer. 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. Install metal flashing at every dormer roof to main roof connection. Slide the membrane up the roof along the wing wall placing it so that the half with the release paper is on the roof. Place this in the valley on each side of a gable roof one edge laid on the gable roof with the other side nailed flat on the.

3 install roof shingles to the base of the dormer notching around the corners as needed. Bend the corner flashing tightly around the corner. Roof shingle over step flashing. I have my valley custom made with water trough to help with leaking b.

The top joinery of both valleys when they meet on the same plane of roof is shown here. For photos and the four steps to flash a dormer click the view pdf button below. Remove the paper from the first piece and press onto cheek membrane piece. 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.

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. Flashing a dormer in prattville al. Both the peel and stick membrane and the underlayment should extend up the wall higher than the vertical leg of the step flashing. If you do not wish to form your own corner flashing you can buy pre bent pieces and cut them to size or use a piece of corrugated aluminum which is easier to bend.