Transition Roof Tin Over Porch

This allows water to flow off the upper panels out over the trim onto the lower panels and exits the roof at the eaves.

Transition roof tin over porch. Use the metal break tool to bend the flashing lengthwise in the middle according to the angle of the roof joint. Attach the horizontal beam by using a nail gun. Step 6 make a 10 degree bend on the shingle edge of the flashing approximately 1 2 inch from the edge. 4 inches should go up the house wall and 4 inches should go on top of the porch roof shingles.

Screw the steel hex washer head screws into the tops of corrugated waves of tin roofing material to prevent leaking through screw holes at the bottoms of the waves when rain runs down the roof. We see this quite frequently in log home roofs with porches for example. This is a fairly common roof detail. You have to do it thoroughly so that the rafters sit flush on it.

Pitch transitions are a common roof detail. Most flashing is 8 inches wide. The piece that allows us to join the two different slopes is the pitch transition trim. A roof pitch transition is a line in the roof plane that changes pitch.

We re going to install it over top of the panels that have already been installed on the lower slope. After that to make it flush with the roof of the existing house cut the two outer rafters. Attach 3 by 3 foot sheets of tin to each section of the frame using 1 inch steel hex washer head screws and a cordless drill.