Independent research and testing have demonstrated that the best performing ridge vent, in terms of air flow and weather protection, is an externally baffled ridge vent. CertainTeed Ridge Vents combined with sufficient intake vent, such as CertainTeed Intake Vent, are the most efficient and effective systems you can install. Fast and easy installation - internal ribbing adds rigidity to make the vent nail gun friendly. Roll it out and nail it down. Prevents the premature deterioration of shingles and other roofing materials caused by inadequate ventilation. We have taken that technology and incorporated it into our ridge vents in 28-foot rolls.