The Roofing System

How low can you go?

Well, there are highs and there are lows. Usually the highest point you can go on a roof is the “ridge.” You know, where the two sides of a roof meet at the top. But the lowest place on a roof is usually the “valley.”

Roofing Valley

A roof valley is where the “V” shaped channels of the roof runs up and down the distance of the two sides of the roof. Where the two sides of the roof meet they create a valley for the water to enter and run off the roof.

Valleys are vulnerable to rain storms because they are considered a weak area in the roofing industry. Because they are susceptible to water leaks they must have special attention shown to them. To make sure they won’t leak during rain storms they will have special roofing material installed in them. There are several ways to protect the valleys on a roof.  Roofing contractors will vary in their choice of what they consider to be best product for protecting the valleys.

Roofing Materials

Most valley products can easily be purchased where roofing materials are sold. Which valley product is right for your roof? You can do your own research on line to help you find the right valley product for your roof if you are planning to do it yourself. But a word to the wise is; roof valleys are one of the most vulnerable places on your roof for water leaks so…  “Get It Right.” Take time to make sure your valleys will not leak. If you are using a Professional Roofing Contractor you should be able to rest easy that he will make sure your valleys will not leak. After all, he doesn’t want the headache of a valley leak to have to repair.

Valley Metal

There are two main types of valley products that are used to prevent the roof valley from leaking. First, there is “Valley Metal.” Most valley metal that is installed is aluminum and comes in different size widths and lengths. The valley metal is unrolled down the length of the valley from one end to the other. Because it is soft and easy to form the roofer will shape the valley and then nail it to the decking. Once the valley metal has been installed it will be covered with felt and then the shingles giving it a triple protection to prevent water leaks.

The second type of valley protection is “Ice and Water Shield.” Ice and water shield is a roofing underlayment that is self-adhering. It is used in valleys and other vulnerable areas to protect those areas from leaking. Ice and water shield works as a membrane to cover potential problem areas on the roof to prevent water from entering the interior structure. Ice and water shield is easily rolled out and cut to fit. It is self-adhering to the decking by simply removing the firm from the back side.

Which one is best is simply a matter of choice.