Valley Roof Installation

Before the installation of a shingle roof assembly the roofing contractor installs an underlayment over the entire roof deck.

Valley roof installation.

You may need to cut panels to fit angles using a circular saw with a metal saw blade. Overlap metal roof valley sections by 12 inches and seal the lap with a flexible sealant such as polyurethane or butyl on roofs shallower than 5 12. The silicone will spread and adhere creating a seal. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

Install the panel so that the short lip overlaps the large lip. Screw the new panel in place as described. Continue adding panels until the roof is covered. Roof one side of the valley running the shingles across it.

Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Incorporated into the underlayment may be a self adhering ice and water shield or another type of underlayment that is a heavier gauge than the underlayment that covers the remainder of the. 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. The cut edge then is sealed with roof cement.

Preparation of the valley with an underlayment is a critical part of your roof installation. Even so a high percentage of valley flashings are not installed properly because the roof repair company does know the. The three methods to shingle a roof valley. The underlayment is an integral part of every valley and provides a waterproof base all valley installations require appropriate underlayment layers.

Proper valley flashing installation isn t difficult to achieve. Metal roofing is also available in the form of. Although this valley system isn t entirely new you won t find it described on shingle wrappers. Stop nailing 6 inches from the center.

In fact following a few basic installation procedures will typically achieve a reliable installation. Posted february 17 2017 filed under roof installation. Where two roof valleys meet for example above a gable dormer a soldered joint is likely to break from the movement. This valley looks the same as a cut valley only it s faster to install.

What is a closed valley roof. Shingle the other side of the valley the same way.