Repair Where Two Roofs Meet

Using 3 layers of thermal tec s mr multi ply roof system where most of the movement occurs will provide a watertight seal in these areas.

Repair where two roofs meet. Make sure that all of the procedures preceding roof flashing are done so that you can flash the roof. We mitered the two subfascias where they met and then filled in with wedged shaped blocking screwed to the tops of the common rafters to support the plane of the shed roof. Cover the repaired area with a patch of roll roofing. Step 1 make sure all your homework is done.

If leaks continue to occur from ice dams consider installing roof edge heating cables. Step 2 consider your available flashing options. Place the 2 by 4 inch piece of lumber along the center of the flashing. Apply a generous layer of roof cement over the repaired tear then set the patch over the cement covered area.

A 2 12 pitch should actually get a rubber covering as shingles will not. This should cover the most leak prone areas. Slide the right edge of the flashing under the highest roof pitch. Position the flashing between the two roof pitches.

We cut the rafters to length on the porch roof so that the subfascia would be in line with the subfascia on the new overhangs we d added to the shed roof. Attach the valley in place with 1 1 4 inch roofing nails and a shingle hatchet or hammer. If leaks continue to occur from ice dams consider installing roof edge heating cables. How to install roof flashing where 2 roof valleys meet.

This should cover the most leak prone areas. Step 3 calculate needed flashing. Metal to metal connections are difficult to keep watertight long term. Then reshingle sliding metal step flashing behind the fascia board the trim behind the gutter.

If you didn t need to replace the roof substrate cut a patch of tar paper or rubber roll roofing 12 in 30 cm wider and longer than the mended section. Then reshingle sliding metal step flashing behind the fascia board the trim behind the gutter. My suggestion is to tin the junction of the two roofs and put two rows of water and ice barrier down as added protection. The valley flashing laid over the joint where the two roofs meet should overlap the step flashing at least 2 in.