Closed Vs Open Valley Roof

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.

Closed vs open valley roof.

That flashing is left exposed so the roof has visible lines of metal running down the valley. In comparison to a closed valley an open valley adds another layer of lining into the valley. In the closed valley method the shingles are installed onto the roof. Meanwhile on an open valley roof the metal lining that prevents water from seeping into the underlayers is left exposed.

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. 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. The reason that many roofers like an open valley is that.

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

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. Roofers on the other hand often prefer an open valley because they feel it is more practical. After the self adhering underlayment is installed across the valley a pre bent metal valley lining is installed. Find out the differences before you talk to a roofing expert.

Another consideration is the outdoor temperature. Open valleys and closed valleys. For a closed valley shingles are installed across the joint where planes intersect. An open valley relies on metal flashing for protection.

There are two methods for sealing valleys. Shingles may crack when being manipulated around the valley. On a closed valley roof the shingles extend to the valley area completely closing it off. Valleys are created where two roof slopes meet.

Open valley shingle installation.