Blown-in insulation between rafters requires a vapor diffusion port at the ridge to function properly and avoid moisture-related issues, making this a critical detail in non-foam insulation strategies.
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Speaker
Scott TrueEvidence Quote
“I did use the The Vapor diffusion port at the ridge I'm just throwing out that out there because there may be some people that that know that this strategy can be an issue unless you're including that vaporative Fusion”
Created: 8/13/2026, 7:44:04 AM
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