As you gather estimates for your upcoming roof replacement project, many items should appear similar from quote to quote (laminate shingles, replace vents, install ice shield, etc…) However, one item in particular has caused debate for years. Which valley technique should I go with? One reputable company says closed cut valleys are best. Another reputable company claims open metal valleys perform better. With valley sections often being the most vulnerable area on your roof and the most likely area to fail, this can be confusing and frustrating for homeowners. This article will attempt to offer insight into the pros and cons of both systems and hopefully help you make a confident choice.