7. There are many ways to shingle a valley. All valleys should have extra protection. Manufacturers and installers will all have their own preference. The valley is one of the most critical areas of the roof. You should ask what, if any, extra protection they will be using.

At Sunik, we recommend metal, or ice and snow guard. If you are using interlocking shingles, the valleys should not be closed. This is NOT recommended, and a common source of leaks.