Uploaded January 2025 | Updated September 2026, 2 hours ago
Vented attics are a major contributing factor when it comes to the spread of wildfires, as embers that are in the air are drawn into the attic space, resulting in an attic fire. Many homes and buildings in California feature vented attics and this significantly exacerbated the intensity and spread of the 2025 wildfires. This isn't just a California problem, this is anywhere that is prone to wildfires. Unvented conditioned attic assemblies are significantly safer in wildfire zones, as they do not allow outside air or embers to enter the roof assembly. In this video, we discuss why vented attics increase your risk of a fire and how switching to an unvented conditioned attic assembly with a vapor diffusion port is cost effective and safer.
*BSI-129: Wildfire* : buildingscience.com/documents/building-science-insights/bsi-129-wildfire
*BSI-088: Venting Vapor* : buildingscience.com/documents/insights/bsi-088-venting-vapor
*BA-2401: Moisture Performance of Unvented Attics with Vapor Diffusion Ports and Buried Ducts in Hot, Humid Climates* : buildingscience.com/documents/building-america-reports/ba-2401-moisture-performance-unvented-attics-vapor-diffusion
*Guide For Building Conditioned Unvented Attics And Unconditioned Unvented Attics With Fiberglass And Mineral Wool Insulation* : buildingscience.com/sites/default/files/document/namia_guide_iv.pdf
*A Moisture Management Guide For Residential Remodels (eBook)* : asiri-designs.com/shop/ols/products/moisture-management-for-residential-remodels
*150+ Free Building Science Articles* : asiri-designs.com/resources-1
*Request Building Science Consulting Services For Your Project:* asiri-designs.com/consulting
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Music by Bensound.com/royalty-free-music
License code: 5K4SZC7UHFKDGCL2
License code: RRR2XZPYVFNXDFEP
Vented attics are a major contributing factor when it comes to the spread of wildfires, as embers that are in the air are drawn into the attic space, resulting in an attic fire. Many homes and buildings in California feature vented attics and this significantly exacerbated the intensity and spread of the 2025 wildfires. This isn't just a California problem, this is anywhere that is prone to wildfires. Unvented conditioned attic assemblies are significantly safer in wildfire zones, as they do not allow outside air or embers to enter the roof assembly. In this video, we discuss why vented attics increase your risk of a fire and how switching to an unvented conditioned attic assembly with a vapor diffusion port is cost effective and safer.
*BSI-129: Wildfire* : buildingscience.com/documents/building-science-insights/bsi-129-wildfire
*BSI-088: Venting Vapor* : buildingscience.com/documents/insights/bsi-088-venting-vapor
*BA-2401: Moisture Performance of Unvented Attics with Vapor Diffusion Ports and Buried Ducts in Hot, Humid Climates* : buildingscience.com/documents/building-america-reports/ba-2401-moisture-performance-unvented-attics-vapor-diffusion
*Guide For Building Conditioned Unvented Attics And Unconditioned Unvented Attics With Fiberglass And Mineral Wool Insulation* : buildingscience.com/sites/default/files/document/namia_guide_iv.pdf
*A Moisture Management Guide For Residential Remodels (eBook)* : asiri-designs.com/shop/ols/products/moisture-management-for-residential-remodels
*150+ Free Building Science Articles* : asiri-designs.com/resources-1
*Request Building Science Consulting Services For Your Project:* asiri-designs.com/consulting
------------------------------------------------
Music by Bensound.com/royalty-free-music
License code: 5K4SZC7UHFKDGCL2
License code: RRR2XZPYVFNXDFEP
