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Crawl Space Ninja Show

Crawl Space Ninja Show

That New Attic Insulation? It's Probably Installed Wrong

· 10 min · Season 2026 Episode 14

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Send us Fan Mail You can drop thousands on blown-in attic insulation and still live with drafts, a scorching second floor, and energy bills that refuse to budge. The uncomfortable truth is that insulation is not an air barrier. If air can move through your attic floor, fiberglass will not stop it, it will only hide it. We walk through the one rule that changes everything for home energy efficiency: seal first, insulate second. We break down how the stack effect turns your house into a chimne...

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