Ventilation

OV1WAY is OMG’s one-way aluminum roof vent from the OlyVent line, designed to allow trapped air pressure within a roof system to escape via a rubber valve while preventing ingress of rain, snow or pests. Its wide base and conical design improve flashing details and make installation easier than standard cylindrical vents. Manufactured from heavy-gauge spun aluminum and fitted with a durable Duro-Nitrile rubber valve, this vent is suitable for various roofing types, including single-ply and...

OV2WAY is OMG’s two-way breather roof vent in the OlyVent product line, designed to help manage both trapped air pressure and moisture within roofing assemblies. It features a Duro-Nitrile rubber valve, spun aluminum body, and wide base for effective flashing detail. The two-way design works together with one-way vents to improve ventilation and prolong roof system life in both single-ply and built-up roofing applications. Key Features allows release of trapped air plus evacuation of moisture...

The Portals Plus 72008 2-Way Black Plastic Breather relieves trapped vapor and equalizes air pressure in roof systems, helping prevent insulation damage and deck separation. Constructed of black high-density polyethylene, this dual-direction breather allows both exhaust and convective airflow between units and includes a locking, vandal-proof rain cap to ward off wind-blown rain and snow. Ideal for flat and low-slope roofs, spacing is approximately one breather per 1,000 square feet. Key...

The Portals Plus Large Aluminum 1-Way Vent provides a high-capacity roof system venting solution designed to relieve trapped moisture and air pressure in large roof areas. Constructed of heavy-gauge .060″ spun aluminum with abase flange diameter of 11.5″ and a minimum height of 11″, it features a 6.5″ stand-pipe base opening and a 4.5″ counter-flashing locking, vandal-proof rain cap. It is specified for use at approximately one unit per 1,500 square feet of roof area (retailers ship in cases...