Fire Rated Roof Vents

The intumescent coating is designed to quickly swell up and close off when exposed to high heat.

Fire rated roof vents.

Vulcan vents are the perfect fire stopping vent for your home. The core of our fire and ember safe vents are manufactured out of hi grade aluminum honeycomb and coated with an intumescent fire proof coating. Several vents have been accepted for use by the office of the state fire marshal these vents can be used in applications where ember and flame intrusion resistance is required. Quick reference as well as more pics and info for dormer vents.

Do not use fiberglass or plastic mesh because they can melt and. In addition to all the design construction features and color choices of the o hagin standard line this patent pending attic vent features an interior stainless steel diffuser that breaks down wind driven rain and snow before it can enter the attic space. Dormers much like gables offer large areas of ventilation in a vertical orientation and are best when used as high up as possible on the roof. Vents on homes create openings for flying embers.

Cover all vent openings with 1 16 inch to 1 8 inch metal mesh. These vents typically use a combination of screening and other design features such as baffles or intiumescent materials to resist intrusion of embers and flames. I mentioned five excellent roof vents in this article but my favorite has to be the lippert components 389381 white roof vent because of the patented 360 siphon design it has adopted. Vents are vulnerable to wildfires when embers and flames enter into the enclosed attic or crawl spaces and ignite combustible materials in those areas.

Under eave soffit vents important airflow notes. Climate considerations should be taken into account when considering dormers. As seen on this old house vulcan vents are designed to be fire and ember safe. It shows fire penetrating a frieze block vent with flames entering into what would be the attic.

Flame ember resistant vents naturally provide less airflow than regular unprotected vents and brandguard vent airflow ratings nfva are approximately 30 that of the same size standard 1 4 screened vent and are listed within each products description. When a wildfire nears and the vent reaches the critical temperature the intumescent coating on the matrix structure expands creating an insulating barrier from fire and embers. This is a photograph from a test conducted in a fire research laboratory. An ember catching screen blocks dangerous embers during ember attacks long before the fire arrives.

Block any spaces between roof decking and covering to prevent embers from catching. Build your roof or re roof with materials such as composition metal or tile.