From The Build Show.
In this episode of The Build Show, Matt demonstrates how exterior mineral fiber insulation can dramatically improve a home’s fire resistance while delivering year-round energy benefits. He compares PowerWool’s Class A, non-combustible mineral fiber board to traditional foam insulation, showing how foam quickly melts, burns, and drips under a propane torch, while mineral fiber withstands over 2,000°F with minimal surface change. Wrapped around a monopoly-framed wall assembly, the two-inch PowerWool layer prevents heat from penetrating the sheathing, which stays near room temperature even after a full minute of direct flame. Matt also highlights mineral fiber’s additional advantages: vapor permeability, moisture safety, acoustic performance, dimensional stability, and resistance to insects, rodents, and decay. He explains how it supports best practices in fire-zone construction, especially when paired with Class A roofing and siding, and how ember-resistant screening may be needed in rainy climates. Overall, Matt shows why mineral fiber acts like a fire blanket for modern homes.
Huge thanks to our episode sponsor, Powerwool. Learn more at: https://powerwoolinsulation.com/
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Huge thanks to our Show sponsors Builders FirstSource, Huber, Pella & Viewrail for helping to make these videos possible! These are all trusted companies that Matt has worked with for years and trusts their products in the homes he builds. We would highly encourage you to check out their websites for more info.
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