OlyVent Aluminum 2-Way Breather

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 with two-way breather design
• spun aluminum construction with rubber valve for durability and performance
• conical shape and wide base opening improve flashing and installation details
• designed to be vandal-proof and resist entry of rain, snow, or pests
• suitable for use in both single-ply and built-up roof systems

• item number: OV2WAY
• height: 8 in
• base diameter: 11 in
• stack diameter at base: 5 in
• body thickness: 0.051 in aluminum
• number of vent holes: 8
• vent hole diameter: ½ in (rubber valve)
• cap diameter: 4 in
• cap thickness: 0.051 in aluminum
• ventilating area: 1.57 sq. in. net free area
• air flow volume: approx. 2.8 CFM
• recommended spacing: one OlyVent or breather per 1,000 sq. ft.

• Cut a 4-inch diameter opening through roofing membrane and insulation down to the deck or vapor barrier.
• Remove insulation and membrane down to required level around opening.
• Place the OV2WAY vent over opening, align properly, and fasten to roof deck using appropriate fasteners.
• Flash the base per roof system manufacturer’s detail.
• Confirm cap is correctly marked as two-way.
• Space additional vents or breathers across roof per design requirements, often about one per 1,000 sq. ft.

Q: What does “two-way breather” mean for OV2WAY?
A: It means the vent is designed to allow both air and moisture vapor to escape the roof system.

Q: Is OV2WAY made from durable materials?
A: Yes; spun aluminum for body and cap, with a Duro-Nitrile rubber valve.

Q: What are key dimensions of OV2WAY?
A: It is 8 in tall, has an 11 in base diameter and 5 in stack diameter at base.

Q: How many vents are recommended per roof area?
A: Approximately one OlyVent or breather per 1,000 square feet, unless specifications or codes dictate otherwise.

Q: Is OV2WAY compatible with all roof types?
A: It can be used with both single-ply and built-up roofing assemblies.