Roofers trust Duraflo roof vents. Our roof vents stand up to the harshest climates in North America with guaranteed and proven performance. Because our vents are manufactured with high-grade polypropylene, they can be installed at cold temperatures and they won't crack. By using only the best material, Duraflo vents can stand up to both extreme heat and cold weather and will last for the life of the roof. The innovative design of our WeatherPRO series offers the best weather protection in the industry, and helps to ensure your roof will not leak. We are a leading North American manufacturer and produce a wide variety of premium WeatherPRO roof vents and standard roof vents to fit all of your ventilation requirements.