Roof Valleys Metal Or Shingle

That flashing is left exposed so the roof has visible lines of metal running down the valley.

Roof valleys metal or shingle.

With an open valley a strip of metal will be visible on the roof wherever two opposing roof planes meet. For an open valley a sheet of metal usually steel sometimes copper is fastened to the roof deck. The metal is usually pre painted to best complement the shingles color blend. The shingles are then cut out of the valley area opening the surface of the valley lining to water run off and the environment.

These items can be fabricated in many different profiles. For example in metal roofing systems valleys are commonly fabricated with hems but can also be fabricated without them in which case they could still be used for metal roofing or any other type of roofing. In addition it is important to avoid nailing the shingles through the valley metal. Roofing shingles are installed then cut and sealed where they overlap the metal channel.

Some homeowners do not like the look of open valleys while others feel the metal accentuates the roof s shape particularly if copper or painted flashing is used.