Fire resistant design and construction
The envelope is the entire exterior of your home - including doors, windows, walls, and the roof. Openings in the envelope diminish the home’s fire-resistant integrity by allowing smoke and flames to enter the home. Tightly sealing the envelope’s primary openings and intersections improves a home’s fire-resistance. Homes built with the right materials and smart detailing have a far better chance of remaining standing after a flashover event. Some of the ways to ensure a tightly sealed envelope include: read more
- Roofs - install a “Class A”, fire-rated material roof, such as standing seam metal, tile, slate, or cementitious composite roofing.
- Walls - cover walls in cement board underlayment and/or stucco, stone veneer, aluminum siding or other non-combustible finish.
- Doors and windows - use aluminum, steel, or clad products with tempered glazing.
- Vents and Openings - avoid roof and wall vents or minimize those penetrations if they are otherwise required by code. Install pet doors that are rated for fire.
- Eaves - enclose eaves with stucco or use DensGlass®, but if exposed wood rafters are still desired, use heavy timber instead of 2x lumber.
- Seal the envelope - quite literally. Where materials come together, seal all joints with a non-combustible material.
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