Closed Vs Open Valley Roof

Roofers on the other hand often prefer an open valley because they feel it is more practical.

Closed vs open valley roof.

This essentially extends the asphalt shingles through the valley so the roof surface covers or closes the valley area hence the name. Meanwhile on an open valley roof the metal lining that prevents water from seeping into the underlayers is left exposed. On a closed valley roof the shingles extend to the valley area completely closing it off. Another consideration is the outdoor temperature.

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. Open valleys and closed valleys. 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. Because of the sheer amount of water being navigated through this section your valleys need to be properly sealed.

An open valley relies on metal flashing for protection. There are two methods for sealing valleys. What s the difference between a closed and open valley roof. I would probably say go with the open valley if your roof is being installed in colder temperatures.

What is an open valley roof. 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. Open valley shingle installation. For a closed valley shingles are installed across the joint where planes intersect.

Shingles may crack when being manipulated around the valley. Valleys are created where two roof slopes meet. 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.

The shingles completely cover the underlayment and they become the valley lining itself. In comparison to a closed valley an open valley adds another layer of lining into the valley. 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. In the closed valley method the shingles are installed onto the roof.

Find out the differences before you talk to a roofing expert.