Ember Protection Systems...
Burning embers from fires miles away can attack your home and burn it from the inside out. They can enter through vents on the roofs, gables, in eaves, soffits, and foundation. Vulcan Vent™ products protect against fire and dangerous ember intrusion without sacrificing air flow.
The Vulcan VentTM was designed and tested to meet the California Building Code SFM 12-7A of the California Wildland-Urban Interface Fire Code Program.
How does it work?
Vulcan VentTM begins with a standard frame design, but behind that is a 1⁄4” hexagon expanded aluminum, coated with an intumescent coating from Firefree Coatings, Inc.
The coating swells up when exposed to high temperatures and closes off the cells, effectively blocking fire and ember intrusion.
After the cells close off they are extremely well insulated and fire or embers cannot penetrate.
Even before the cells close off, the vent is designed to protect against flying embers. In many cases embers will attack a home before fire ever comes near, so this feature is very important.
You can also review the Test Report Acceptance that meets the California State Fire Marshal's Office CBC Ch7A Compliance Policy #09-03.
Here is a link to CHAPTER 7A [SFM] MATERIALS AND CONSTRUCTION METHODS FOR EXTERIOR WILDFIRE EXPOSURE from the California State Fire Marshall's Office.
http://www.fire.ca.gov/fire_prevention/downloads/ICC_2009_Ch7A_2007_rev_1Jan09_Supplement.pdf
*Installation Services Available