Track record: Ridge vents exhaust the attic air in the top on the roof. Good ventilation is good for the house, health on the attic and lifestyle expectancy of the roof. Metal ridge vent & rolled ridge vents are probably the most problematic. Metal ridge vents are mild and made https://types-of-roof-valleys62738.blogsumer.com/36347845/roofing-repairs-in-rockville-md-for-dummies