Valley On A Metal Roof

Roof mastic applied along sides of valley flashing.

Valley on a metal roof.

Closed cut valley fully replaced with new metal valley flashing. An open valley relies on metal flashing for protection. Best practices for sealing the metal roof valley vary based on the slope of the roof. Failure to extend the entire width of the metal valley flashing beyond the eave of the roof.

No sales pitch or other fluff. The metal valley is installed on top of the ice and water shield and creates a highly effective barrier and passageway to keep your roof dry and protected. Masterrib is a 36 wide 5 r. Fold the top over the roof ridge and cut the bottom along the drip edge metal.

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. For an open valley a sheet of metal usually steel sometimes copper is fastened to the roof deck. This will reduce the installed cost of the project. The metal is usually pre painted to best complement the shingles color blend.

Roofing shingles are installed then cut and sealed where they overlap the metal channel. Whether for slate shingle or metal roofing valley flashing adds detail and helps to direct water. That flashing is left exposed so the roof has visible lines of metal running down the valley. Avoid the following common errors.

Contractors may be able to reduce the cost of materials on roofing projects by eliminating the metal being installed in the valleys. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. When properly installed w valley flashing will reliably channel run off water down the roof and into the gutter. Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant.

Fasteners placed in the exposed center area. Just simple 3d animated digital instructions on how to install a valley on a masterrib panel roof. How to seal metal roof valley. Open valleys on the other hand leave the metal exposed which may be more pleasing to the eye especially if copper is used as the valley lining.

These items can be fabricated in many different profiles. Be sure to check local building codes to ensure you have the proper width for your application. Punctures in the center of the valley. With a clean valley you can lay down some peel and stick roofing membrane.

Valleys are a very important part of a well designed roofing system.