Moore Vents :: 2011
Moore vents attach under roof deck, helping keep the roof cooler in summer and a thermal break in winter so icing up is reduced. They also keep moving air away from batt insulation. Batt / loose insulation acts as an air filter, and when it captures enough dirt it no longer has insulating value. Insulation is trapped air, and dirty insulation is a thermal conductor.
These vents are overlapped from peak towards lower wall, so any roof leaks are channeled down & outside. Staples hold each vent in place before insulation is packed in the cavity. Spray foam insulation will seal around the vents at outside walls.