Soffit Vents

Soffit vents built to protect.

Soffit vents are the vents on the underside of the roof’s eaves (soffits). Soffit vents can also be placed under arches, balconies or decking, beams, cornices, or vaults on top of a home. These vents allow fresh air to circulate through the attic space, providing proper ventilation so that condensation doesn’t lead to mold and mildew. 

Soffit vents draw up cooler air from the base of the roof while hot and humid air is exhausted through roof vents at the top of the attic.

Ember-resistant soffit vents
made for wildfire exposure.

Ember and fire-resistant vents are required under California’s Chapter 7A building codes for homes located in wildfire-prone areas otherwise known as the Wildland-Urban Interface (WUI). As such, Vulcan Vents are recommended for homes by the Office of the State Fire Marshal (OSFM). See the Cal Fire listing here. Our corrosion-resistant vents were created with homes that face wildfire threat in mind. An inner noncombustible wire mesh screen protects vent openings from floating ember entry while an intumescent coating expands in the presence of intense heat, further blocking entry of embers and flames. Vulcan soffit vents are available for stucco, wood construction, foam and stucco, fiber cement, or retrofit applications. Our corrosion-resistant vents were created with homes that face wildfire threat in mind. An inner noncombustible wire mesh screen protects vent openings from floating ember entry while an intumescent coating expands in the presence of intense heat, further blocking entry of embers and flames.  Vulcan soffit vents are available for stucco, wood construction, foam and stucco, fiber cement, or retrofit applications.
soffit vent with sufficient airflow and a coating that self-closes under extreme heat

Standard Soffit Flange Diagrams

Vulcan Foam Back Soffit Vent

Vulcan Fiber Cement Soffit Vent

Vulcan Flange Front Soffit Vent

Vulcan Stucco Soffit Vent

* The above installation diagrams are for general and conceptual, illustration purposes only! For specific installation instructions, please consult a licensed building professional.

Vulcan Vents: Protecting the most vulnerable places on a home
Giving homeowners peace of mind.

Vents on exterior walls, under roofing, and at a home’s foundation, are prime entry-points for dangerous embers that precede a wildfire. Wind-blown embers that fly at a house can get caught in vents and potentially burn the home by igniting combustible materials in an attic, basement, or crawlspace.

Vulcan Vents are open, providing sufficient airflow, but an ember-catching screen and a coating that self-closes will block ember and intrusion of flames when it matters most.

Mariposa County Fire aerial
baffle-free vents with more venting per square inch

Baffle-free design
for efficient airflow.

Vulcan Vents soffit vents use a baffle-free design to encourage air to circulate freely under the roof covering. Vulcan Vents do not use airflow-interrupting baffles, resulting in more venting per square inch for the net free area.

Vulcan Vent
Features

Honeycomb matrix closing technology with ember-catching screen mesh built into galvanized steel frame

Net free vent area (96 sq. in) providing open soffit ventilation

Designed to meet the new California Building code State Fire Marshal (OSFM) 12 Chapter 7A of the California Wildland-Urban Interface (WUI) fire code program

Passed the American Society for Testing and Materials (ASTM) E2886 to effectively block ember entry

It’s time for your home to protect itself.

Flange Styles

Standard Finishes

G90 Galvanized, Stainless, Copper, Bonderized

Mfg. Part # Description NFVA(square inches) Flange Style Cut Out(inches) Spec. Sheet(download) Sample Image
VE3522FB 3.5" x 22" FOAM BACK FLANGE SET BACK 1-1/2" 41 Foam Back 3.5 X 22 download icon view icon
VE3522FC 3.5" x 22" FIBER CEMENT FLANGE recessed 3/8" 41 Fiber Cement 3.5 X 22 download icon view icon
VE3522FF 3.5" x 22" FLANGE FRONT 41 Standard 3.5 X 22 download icon view icon
VE3522S 3.5" x 22" STUCCO SET BACK 3/4" 41 Stucco 3.5 X 22 download icon view icon
VE5522FB 5.5" x 22" FOAM BACK FLANGE SET BACK 1-1/2" 75 Foam Back 5.5 X 22 download icon view icon
VE5522FC 5.5" x 22" FIBER CEMENT FLANGE recessed 3/8" 75 Fiber Cement 5.5 X 22 download icon view icon
VE5522FF 5.5" x 22" FLANGE FRONT 75 Standard 5.5 X 22 download icon view icon
VE5522S 5.5" x 22" STUCCO SET BACK 3/4" 75 Stucco 5.5 X 22 download icon view icon
VE7522FB 7.5" x 22" FOAM BACK FLANGE SET BACK 1-1/2" 119 Foam Back 7.5 X 22 download icon view icon
VE7522FC 7.5" x 22" FIBER CEMENT FLANGE recessed 3/8" 119 Fiber Cement 7.5 X 22 download icon view icon
VE7522FF 7.5" x 22" FLANGE FRONT 119 Standard 7.5 X 22 download icon view icon
VE7522S 7.5" x 22" STUCCO SET BACK 3/4" 119 Stucco 7.5 X 22 download icon view icon
VFS414FB 4" x 14" FOAM BACK FLANGE SET BACK 1-1/2" 24 Foam Back 3.5 X 13.5 download icon view icon
VFS414FC 4" x 14" FIBER CEMENT FLANGE SET BACK 3/8" 24 Fiber Cement 3.5 X 13.5 download icon view icon
VFS414FF 4" x 14" FLANGE FRONT 24 Flange Front, Retrofit 3.5 X 13.5 download icon view icon
VFS414S 4" x 14" STUCCO SET BACK 3/4" 24 Stucco 3.5 X 13.5 download icon view icon
VFS614FB 6" x 14" FOAM BACK FLANGE SET BACK 1-1/2" 41 Foam Back 5.5 X 13.5 download icon view icon
VFS614FC 6" x 14" FIBER CEMENT FLANGE SET BACK 3/8" 41 Fiber Cement 5.5 X 13.5 download icon view icon
VFS614FF 6" x 14" FLANGE FRONT 41 Flange Front, Retrofit 5.5 X 13.5 download icon view icon
VFS614S 6" x 14" STUCCO SET BACK 3/4" 41 Stucco 5.5 X 13.5 download icon view icon
VFS814FB 8" x 14" FOAM BACK FLANGE SET BACK 1-1/2" 62 Foam Back 7.5 X 13.5 download icon view icon
VFS814FC 8" x 14" FIBER CEMENT FLANGE SET BACK 3/8" 62 Fiber Cement 7.5 X 13.5 download icon view icon
VFS814FF 8" x 14" FLANGE FRONT 62 Flange Front, Retrofit 7.5 X 13.5 download icon view icon
VFS814S 8" x 14" STUCCO SET BACK 3/4" 62 Stucco 7.5 X 13.5 download icon view icon

*Some Vulcan Vent foundation vents, eave vents, and soffit vents are in multiple categories because of cross-application capability of certain models.