Open Valley Roof Vs Closed

If you have a shingled roof as most torontonians with a sloped roof tend to have then you will have one of two kinds of valleys on your home.

Open valley roof vs closed.

Roofers on the other hand often prefer an open valley because they feel it is more practical. An open valley relies on metal flashing for protection. According to long time iko sales representative jeff tessaro closed valleys for residential construction have been popular since he was a roofing contractor in the late 90 s. Find out the differences before you talk to a roofing expert.

The open valley looks like each plane of the roof was cut in separate and the eye is drawn to the separation. Open valley shingle installation. With each new course roofing shingles continue up the valley. That flashing is left exposed so the roof has visible lines of metal running down the valley.

I would probably say go with the open valley if your roof is being installed in colder temperatures. 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. Pros and cons of a closed valley roof architects often prefer closed valleys to open valleys as they feel that it gives a home better architectural appeal. After the self adhering underlayment is installed across the valley a pre bent metal valley lining is installed.

This roof is on a small cabin in the back of beyond and the only valleys will be on 3 small dormers with about 6 feet of valley per side so i m not sure the water will wear out the valley shingles argument will work. There are 4 main kinds of valley installation methods to explore for your roof. This essentially extends the asphalt shingles through the valley so the roof surface covers or closes the valley area hence the name. The closed variation is a flashing that has been completely covered with shingles while in the open variation will have the flashing completely exposed to the elements.

In this video we explore the california cut woven closed cut and open metal. The shingles completely cover the underlayment and they become the valley lining itself. Because of the sheer amount of water being navigated through this section your valleys need to be properly sealed. Open valleys and closed valleys.

In the closed valley method the shingles are installed onto the roof. For a closed valley shingles are installed across the joint where planes intersect. There are two methods for sealing valleys. In comparison to a closed valley an open valley adds another layer of lining into the valley.

What is an open valley roof. Shingles may crack when being manipulated around the valley.