If your home’s roof has valleys on it, it’s important to know how those valleys will be handled if you’re having a metal roof installed. Valleys occur on a roof when adjoining roof planes meet, usually at a right angle with an inside corner. If your home ever gets debris on the roof such as tree leaves, pine needles, those little maple whirligig seed pods, or ice and snow, it’s important to think about how all of that debris will naturally slide toward the valleys.
Some metal roof manufacturers and contractors take the easy way out on valleys. They will either have channels that the metal roof panels are received into or they will just use butyl sealants to try to make them watertight. These both will be eventual problems. If the panels are received into channels at the valleys, those channels will clog with the roof debris that slides into them. Clogs will cause water to go places it shouldn’t or can even cause water to pool and collect in the valley system, eventually causing rust or corrosion. Valleys that are just sealed with butyl or other materials are very prone to eventual failure when those sealants dry out and crack, if they even seal right in the first place.
The valley system you really need is what we call an open or self-cleaning valley. This type of valley carries water as well as all debris on top of the roof system, never in hidden channels beneath the surface of the roof. This prevents the clogging problems which inevitably lead to water getting places it shouldn’t be and causing problems.
Todd's expertise comes from his years of experience in metal roofing manufacturing. As president of Isaiah Industries, based in Piqua Ohio, Todd runs a several of the world’s leading manufacturers of residential metal roofing; Classic Metal Roofing Systems, Kassel & Irons, and Green American Home. His personal goal is to educate homeowners of the long-life benefits of metal roofing.
Need help finding a local, quality metal roofing contractor or supplier? I can help.Find a Contractor or Supplier
Unfortunately, most roofing contractors come in, measure, and simply give you a price. Learn more about what you want and what you need in new roof, before you invite the contractor into your home. My Roofing Profile Selector is easy to use, and it will help you find the very best roofing solution for you and your home.
Educate yourself for a better experience when buying a new roof
This comprehensive eBook includes everything you'll need from "choosing a manufacturer" to a "metal roofing checklist," and is sure to be a great tool for helping you make the best investment in you home’s protection.Get your copy!