What standard should a homeowner use to determine if he has enough air movement in the attic?
Ben writes again from Great Falls, Virginia: “Refering to the Soffit/Ridge Vent FAQ: What commercial or manufacturer’s standard(s) should a homeowner use in determining if he has enough air movement in his attic? Case in Point: If you are planning to install a new roof, does the roof manaufacturers, e.g., CertainTeed or GAF, have standards for air movement? Do you know what they are for CertainTeed or GAF? Does this override the Owens standard for air movement in the attic? – different flow rate or what? Why install the Owens Corning Pink Roof Vents, if the assumption is that you install wide enough soffits air will automatically enter and go to the top of the ridge vent – is this really true???? Please remember most folks allow the contractor to make those 2by2 holes in the wood soffits not realizing that may not even meet any std(s) at all to move enough air to meet Owens or CertainTeed or GAF std(s) – bye bye effectiveness and warranty!” Answer: Owens Corning follows the HUD require
