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Why Your Upstairs Is Hot Even With Good AC
04 June 2026

Why Your Upstairs Is Hot Even With Good AC

Crawl Space Ninja Show

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Is your upstairs always hot even when your AC is running? You're not imagining it โ€” and your AC probably isn't broken. In this video, Crawl Space Ninja founder Michael Church explains the five real reasons your second floor stays hot all summer long, and exactly what to do about each one.

We cover attic heat and radiant heat transfer, air sealing and the stack effect, leaky ductwork running through hot attics, poor attic ventilation, and HVAC airflow imbalance in two-story homes. If you've been blaming your AC, this video will change how you think about your whole house.

๐Ÿ†“ FREE Attic Air Seal & Insulate Guide:
๐Ÿ‘‰ https://buymeacoffee.com/csninja/e/478323

๐Ÿ›’ DIY Store โ€” Professional-Grade Materials:
๐Ÿ‘‰ crawlspaceninja.com/supply

๐Ÿ“ž Book a Personal Consultation with Michael:
๐Ÿ‘‰ buymeacoffee.com/csninja

Support the show

Check out Michael's book, "Crawl Space Repair Myths-Busted" now available on Amazon!

Schedule a consultation: https://buymeacoffee.com/csninja/extras

Need help: https://crawlspaceninja.com or https://supply.crawlspaceninja.com