Roofing Valley Transition

Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic clip the top corner of shingles along valleys to keep water flow toward center of valley.

Roofing valley transition.

Cut the panels from the ground instead of on the roof to avoid damaging the roof with the debris. How to seal metal roof valley. With a clean valley you can lay down some peel and stick roofing membrane. Low slope roofs slope less than 3 12 use tape sealant between the valley trim and the panel.

At the roof transition shown in. Valleys are prone to collecting leaves particularly if someone sets up an antenna at the base of the valley. Take care not to place any fasteners in the exposed center area of the metal flashing. Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet.

Fold the top over the roof ridge and cut the bottom along the drip edge metal. If repairs are needed the contractor has to remove and then reweave multiple shingles to replace a single one. The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off. In order to shingle this kind of roof valley a roofing professional has to install both roof faces at the same time which is quite slow.