Intersecting Roof Valleys

Stop nailing 6 inches from the center.

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. For roof pitches less then 6 per foot the flashing extends at least 12. Interestingly you can mix and match roof styles when building a gable and valley roof designs for a cross footprint home. Shingle the other side of the valley the same way.

The main difference between the two is that valley rafters sit on inside corners while hip rafters sit on the outside corners. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch overlap. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Where two gable roof lines meet the intersection forms inside corners called valleys.

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

Applicable for ultravic supervic 7 8 corrugated barnmaster diamond rib double. It s also known as a cross gable roof since the home has a cross footprint. For roof pitches of 6 or more per foot the flashing extends at least 9 under the roof covering on each side. The diagonal rafter that runs from the intersection of the ridges down to the top of the walls at the inside.

How to install a valley on a vicwest metal roof. Again choosing the easy way out we opted to build blind valleys aka california valleys where one intersecting roof is built on top of the other. The gable roof on the porch addition was framed with a dropped structural ridge supporting the common rafters above.