VentSure® Rigid Roll Ridge Vent is a shingle-over, low-profile ridge vent designed for effective performance of ventilation for an energy efficient roofing system and provide year-round protection and consistent ventilation in the attic. What's more, VentSure® Rigid Roll Ridge Vent has a Weather Protector® moisture barrier that helps provide added protection against weather infiltration. For an efficient roofing system, it's essential that the attic stay dry and Cool. VentSure® Rigid Roll Ridge Vent in combination with sufficient intake ventilation allows the natural flow of outside air upward through the attic. Without this system, moisture can reduce the effectiveness of your insulation, causing rotting or mildew on wood surfaces, drywall damage, peeling paint or warped siding.