Fire Rated Roof Vents

Vents on homes create openings for flying embers.

Fire rated roof vents.

Quick reference as well as more pics and info for dormer vents. 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. The best ventilation solution for tile roof applications in areas where rain or snow may be a concern. The intumescent coating is designed to quickly swell up and close off when exposed to high heat.

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. Vulcan vents are the perfect fire stopping vent for your home. It shows fire penetrating a frieze block vent with flames entering into what would be the attic. Vents are vulnerable to wildfires when embers and flames enter into the enclosed attic or crawl spaces and ignite combustible materials in those areas.

The prices of roof vents also go up when manufacturers add extra features to the vents. 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. Climate considerations should be taken into account when considering dormers. The vulcan vents are the only fire resistant vents that meet both the wildland urban interface wui and the one 1 hour fire test standards for the exterior of buildings all while providing the proper amount of ventilation to attic and crawl spaces in building structures.

Build your roof or re roof with materials such as composition metal or tile. As seen on this old house vulcan vents are designed to be fire and ember safe. Cover all vent openings with 1 16 inch to 1 8 inch metal mesh. Block any spaces between roof decking and covering to prevent embers from catching.

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. 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. 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. This is a photograph from a test conducted in a fire research laboratory.

Under eave soffit vents important airflow notes. 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.