The TRI-BUILT® Galvanized Metal Dome Vent is made of galvanized steel with a 24″ x 24 flashing and 14″ opening. These roof louvers are designed to cover roof openings to allow air to escape the attic. Several of these vents are usually required to properly ventilate the attic. They should be placed evenly across the roof. Choose from metal or plastic in round, square, or slant-back designs.
According to federal guidelines, homes require 1 square foot of net free area (the total unobstructed area through which air can enter or exhaust a non-powered vent) for every 150 square feet of attic floor space. If balanced between intake and exhaust vents, the requirement is 1 square foot of net free area for every 300 square feet of attic floor space.
- Galvanized steel
- 24″ x 24″ flashing
- NFA (square inches): 144/pc.