Do I need to use a ventilation product under my Certi-label™ shingles?
Good ventilation is essential and can be achieved in a variety of ways; check with your Approved Installer to see if nailing strips (spaced sheathing) or a continuous ventilation product is the best choice for your roofing project. Both choices are effective, however the nailing strips (spaced sheathing) are typically ¾” thick and the ventilation product is usually ¼” thick: if the rafters are very long the nailing strips (spaced sheathing) will provide more air circulation.
