Valley Open Roof

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.

Valley open roof.

Open metal closed cut and woven. Once the shingles are installed they don t run through the valley area. A roof using the open valley style involves placing a v or w shaped piece of metal usually galvanized or sometimes copper in the seam of the valley and then covered with a base sheet such as 30lb. The three methods to shingle a roof valley.

These factors can cause water to go under nearby shingles resulting in leaks. 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. Iko recommends that you install architectural shingles with the open valley method for the best roof performance.

Wednesday october 26 th 2016 professional contractors know that one of the most vulnerable areas of any roof is the valley where the roof s planes intersect. An open or closed case for roofing valleys. This leaves a metal strip or line on the surface of the roof that serves as the valley line. This recommendation includes iko s premium shingles.

This valley flashing material can be manufactured from any metal that will resist the effects of weather. This is almost the same as the closed roof valley method except a pre bent metal valley lining is installed instead of a secondary roof underlayment. In downpours torrents from two planes of the roof meet. There are three ways to roof valleys.

After the self adhering underlayment is installed across the valley a pre bent metal valley lining is installed. If not properly protected and sealed a valley can channel water directly into the home with potentially disastrous consequences. Open valleys may be susceptible to water backup if the cut off shingles are not properly trimmed potentially causing roof leaks. When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof.

However it is said that provided the rest of the roofing shingles were properly installed and are performing properly open valleys will perform better over time than closed valleys. Often they are dammed by debris. What is an open valley roof.