Half Round Dormer Vents
Description
Half Round Dormer Vent is made of 26 Gauge Galvanized or Zincalume Steel. This roof Dormer Vent is designed to provide maximum airflow into the attic; with 1-piece galvanized steel construction. Galvanized wire mesh over the opening prevents birds and large insects from entering attic space. For architectural, residential, and commercial roofing. ASTM A-653, ASTM A-792
Product Specifications
Frequently Asked Questions
Which ASTM standard applies to Half Round Dormer Vents?
The applicable standards are ASTM A792 for Zincalume, and ASTM B209 for Aluminum sheet metal.
Can Half Round Dormer Vents be used for intake as well as exhaust?
Half Round Dormer Vents provide passive ventilation, so they can work for both intake and exhaust, depending on where they are installed.
Which of the metals offered for Half Round Dormer Vents should I choose?
For Half Round Dormer Vents, Zincalume is the general-purpose choice; Zincalume holds up longer where salt air or constant damp is a factor. For tile roof applications, aluminum flanges are suggested instead of Zincalume flanges for better form-fitting.
How does a Half Round Dormer Vent ventilate the attic?
Half-round dormer vents provide attic ventilation through a roof-mounted housing with a half-round face, working via convection. As attic air temperatures increase, the hot air rises and escapes through vents at the top of the roof. This creates a negative pressure zone at the lower vents, drawing fresh, cool air into the attic.
Which metals do you make Half Round Dormer Vents in?
Half Round Dormer Vents are made from galvanized steel or Zincalume (Galvalume) and can be made with an aluminum or lead base flange. Stainless steel and copper options are available upon request.
What gauge are Half Round Dormer Vents?
Half Round Dormer Vents are made in 26 gauge.