Metal Valley Shingle Roof

How to shingle a valley with architectural shingles.

Metal valley shingle roof. Roofing shingles are installed then cut and sealed where they overlap the metal channel. Preparation of the valley with an underlayment is a critical part of your roof installation. In most cases a metal valley will add durability and longevity to any roofing system. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic.

Install an underlayment centered in the roof valley. In addition it is important to avoid nailing the shingles through the valley metal. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. Roof one side of the valley running the shingles across it.

Stop nailing 6 inches from the center. Unlikely but it can. Shingles in the valley will not last forever and will have to be replaces during a re roof project but the nails will not leak. For an open valley a sheet of metal usually steel sometimes copper is fastened to the roof deck.

The open woven and closed cut methods are demonstrated. This video demonstrates the proper installation technique for installing roofing valleys. The three methods to shingle a roof valley. Shingle the other side of the valley the same way.

The underlayment is an integral part of every valley and provides a waterproof base all valley installations require appropriate underlayment layers. However the hole that is created from the nail may eventually leak. Fold the top over the roof ridge and cut the bottom along the drip edge metal. Ensure ice and water protector has been installed along the valley first.

Then starting at the base of the valley center your first piece of flashing in the valley. Then install a non corrosive metal valley flashing of 24 minimum width lap successive sheets of metal flashing a minimum of 12 inches and seal laps. It is made of galvanized steel and will not rust. As a single component in the entire system a metal valley effectively protects other parts of your roof including shingles roof felt and the roof deck.

With an open valley a strip of metal will be visible on the roof wherever two opposing roof planes meet. Metal valley will last forever. First clean the debris out of the valley including sawdust nails and whatever else is in there. A chalk line is then used to strike a line from the top of the valley to the bottom of the valley.

To secure the roof valley flashing nail it down carefully. When all roof components are performing well a roof s lifespan is more likely to be maximized. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley.