Intersecting Roof Valleys

It s also known as a cross gable roof since the home has a cross footprint.

Intersecting roof valleys.

Fold the top of the flashing over the ridge and nail it off every ten inches or so along the outer edge of the flashing now this valley will carry water off the roof and away from the house. Applicable for ultravic supervic 7 8 corrugated barnmaster diamond rib double. Roof one side of the valley running the shingles across it. The gable roof on the porch addition was framed with a dropped structural ridge supporting the common rafters above.

The main difference between the two is that valley rafters sit on inside corners while hip rafters sit on the outside corners. The diagonal rafter that runs from the intersection of the ridges down to the top of the walls at the inside. Repeat the process on the other side of the hip using the pitch of the hip for the secondary roof 9 5 8 18 13 16. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch overlap.

Intersecting roofs using a closed valley must have the same slopes so that the shingle butts line up at the valley intersection. Shingle the other side of the valley the same way. Stop nailing 6 inches from the center. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley.

For roof pitches of 6 or more per foot the flashing extends at least 9 under the roof covering on each side. For roof pitches less then 6 per foot the flashing extends at least 12. How to install a valley on a vicwest metal roof. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

An unequally pitched valley rafter is laid out in the same way as the unequally pitched hip. Gable and valley roof. The gable and valley roof is a very popular roof design.