Closed Vs Open Valley Roof

Open valleys and closed valleys.

Closed vs open valley roof.

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. That flashing is left exposed so the roof has visible lines of metal running down the valley. The reason that many roofers like an open valley is that.

Meanwhile on an open valley roof the metal lining that prevents water from seeping into the underlayers is left exposed. Shingles may crack when being manipulated around the valley. 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 comparison to a closed valley an open valley adds another layer of lining into the valley.

An open valley relies on metal flashing for protection. Roofers on the other hand often prefer an open valley because they feel it is more practical. 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. This essentially extends the asphalt shingles through the valley so the roof surface covers or closes the valley area hence the name.

I would probably say go with the open valley if your roof is being installed in colder temperatures. There are two methods for sealing valleys. Open valley shingle installation. 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.

For a closed valley shingles are installed across the joint where planes intersect. With each new course roofing shingles continue up the valley. The shingles completely cover the underlayment and they become the valley lining itself. Valleys are created where two roof slopes meet.

Another consideration is the outdoor temperature. What s the difference between a closed and open valley roof. What is an open valley roof. 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.