Traditional Roof Valley Construction

If the roof valley which is going to be put in place is a closed valley then the person who is repairing your roof will place the roofing shingles on top of the roof deck.

Traditional roof valley construction.

The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off. Woven closed cut and open. Water collects in a valley to flow off the roof. One of the areas of a pitched roof most prone to leakage if not constructed properly is the valley.

It is an area where water is directed towards rather than away from therefore correct detailing and construction is essential. This is because the old valleys used to be galvanised and they start corroding with time especially if they trap leaves. Your choice of valley installation method is critical because when improperly installed valleys are risks for serious leaks. Typically where a valley is located on a roof roof valley replacements are fairly common especially on tiled roofs.

A roof valley is formed where two roof slopes meet. A closed cut roof valley will have at least four layers of roof materials. Essentially there are three main ways to shingle a roof valley. Closed cut shingle valleys work fine with strip shingles and laminated asphalt shingles.

In order to understand roof valley construction completely you need to know about the difference between an open roof valley and a closed roof.