Without a vapor retarder, the vent area need to be doubled. The best ventilation is supplied by a mix placement with the vents with 50 % of the world in the roof peak and fifty per cent in the soffits or eaves. In the function you will get ice dams https://roofrepaircompanies11651.xzblogs.com/63581845/facts-about-diy-gutter-maintenance-and-cleaning-revealed