Valley Roof Installation

Proper valley flashing installation isn t difficult to achieve.

Valley roof installation.

Although this valley system isn t entirely new you won t find it described on shingle wrappers. Even so a high percentage of valley flashings are not installed properly because the roof repair company does know the. Long island valley a young roofer from long island first showed me what i now call a long island valley. Continue adding panels until the roof is covered.

Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. 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. Install the panel so that the short lip overlaps the large lip. The cut edge then is sealed with roof cement.

Where two roof valleys meet for example above a gable dormer a soldered joint is likely to break from the movement. The underlayment is an integral part of every valley and provides a waterproof base all valley installations require appropriate underlayment layers. Before the installation of a shingle roof assembly the roofing contractor installs an underlayment over the entire roof deck. Preparation of the valley with an underlayment is a critical part of your roof installation.

Shingle the other side of the valley the same way. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. The three methods to shingle a roof valley. Roof one side of the valley running the shingles across it.

What is a closed valley roof. 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. You can see in our roof valley photo left that there has been a history of. Posted february 17 2017 filed under roof installation.

A woven valley shingle installation has other drawbacks including that they are slow to install especially in cold weather and more difficult to repair than the other types. You may need to cut panels to fit angles using a circular saw with a metal saw blade. Stop nailing 6 inches from the center. This valley looks the same as a cut valley only it s faster to install.

Metal roofing is also available in the form of. The silicone will spread and adhere creating a seal.