Knee Wall Insulation: Why Finished Attic Rooms Are So Hot!

Knee Wall Insulation: Why Finished Attic Rooms Are So Hot!

Send us Fan Mail [https://www.buzzsprout.com/2371248/fan_mail/new] Is your finished attic, bonus room, or room over the garage always hotter than the rest of the house in summer and colder in winter? Most homeowners assume they need a bigger HVAC system, but the real problem may be hiding behind a knee wall in the attic. In this video, Michael Church from Crawl Space Ninja explains one of the most overlooked attic insulation and air sealing problems: open floor cavities behind knee walls. You'll learn why fiberglass insulation alone often fails, what building scientists call "wind washing," how attic air sneaks under your floor, and why many contractors miss this critical detail. You'll also learn: ✅ What a knee wall is ✅ Why finished attic rooms are uncomfortable ✅ How open floor cavities affect HVAC performance ✅ Common ductwork problems behind knee walls ✅ The proper way to insulate and air seal a knee wall assembly ✅ Why you should check the building envelope before replacing HVAC equipment If you're struggling with a hot upstairs room, high energy bills, or poor comfort in a finished attic space, this video may save you thousands of dollars. 🆓 FREE Attic Air Seal & Insulate Guide: 👉 https://buymeacoffee.com/csninja/e/478323 📖 Seal First, Insulate Second:  👉 https://buymeacoffee.com/csninja/e/546355 My Favorite Radiant Barrier — US Energy Products 👉 https://amzn.to/4vnRixQ 🛒 DIY Store — Professional-Grade Materials: 👉 crawlspaceninja.com/supply 📞 Book a Personal Consultation with Michael: 👉 https://buymeacoffee.com/csninja Support the show [https://buymeacoffee.com/csninja] Check out Michael's book, "Crawl Space Repair Myths-Busted [https://amzn.to/3llnB1m]" now available on Amazon! Schedule a consultation: https://buymeacoffee.com/csninja/extras [https://buymeacoffee.com/csninja/extras] Need help: https://crawlspaceninja.com [https://crawlspaceninja.com/] or https://supply.crawlspaceninja.com [https://supply.crawlspaceninja.com]

Attic Ventilation Explained: Soffit Vents, Ridge Vents, and Why Your Attic Still Gets Hot

Send us Fan Mail [https://www.buzzsprout.com/2371248/fan_mail/new] Is your attic hot even though you have ridge vents, soffit vents, or even a powered attic fan? You're not alone. Many homeowners spend thousands on attic ventilation upgrades and still end up with high energy bills, uncomfortable rooms, and overheating HVAC systems. In this video, I explain how attic ventilation actually works, why balanced airflow matters, and the biggest mistakes I see during attic inspections. You'll learn the difference between soffit vents, ridge vents, gable vents, and powered attic fans—and why more ventilation is not always better. Most importantly, I'll show you why ventilation is only one part of the equation and why air sealing should always come before insulation and ventilation. In this video you'll learn: ✅ Why attics get hot ✅ How soffit vents and ridge vents work together ✅ Why gable vents can create airflow problems ✅ When attic fans help—and when they hurt ✅ Why air sealing is more important than most homeowners realize ✅ The "Seal First, Insulate Second, Ventilate Third" approach 🆓 FREE Attic Air Seal & Insulate Guide: 👉 https://buymeacoffee.com/csninja/e/478323 📖 Seal First, Insulate Second:  👉 https://buymeacoffee.com/csninja/e/546355 My Favorite Radiant Barrier — US Energy Products 👉 https://amzn.to/4vnRixQ 🛒 DIY Store — Professional-Grade Materials: 👉 crawlspaceninja.com/supply 📞 Book a Personal Consultation with Michael: 👉 https://buymeacoffee.com/csninja Support the show [https://buymeacoffee.com/csninja] Check out Michael's book, "Crawl Space Repair Myths-Busted [https://amzn.to/3llnB1m]" now available on Amazon! Schedule a consultation: https://buymeacoffee.com/csninja/extras [https://buymeacoffee.com/csninja/extras] Need help: https://crawlspaceninja.com [https://crawlspaceninja.com/] or https://supply.crawlspaceninja.com [https://supply.crawlspaceninja.com]

Radiant Barrier, Will It Fix a Hot Upstairs Room?

Send us Fan Mail [https://www.buzzsprout.com/2371248/fan_mail/new] Radiant barrier can help with a hot upstairs room — but only if the right things are already in place underneath it. In this video, I break down exactly what radiant barrier does, what it does not fix, and why installing it before air sealing, duct sealing, and proper insulation is one of the most common and costly mistakes homeowners make. I also cover the one situation where radiant barrier makes the most sense — and when the timing actually works in your favor. If your upstairs is hot and you are trying to figure out what to do first, watch this before you spend a dime. 🆓 FREE Attic Air Seal & Insulate Guide: 👉 https://buymeacoffee.com/csninja/e/478323 My Favorite Radiant Barrier — US Energy Products 👉 https://amzn.to/4vnRixQ 🛒 DIY Store — Professional-Grade Materials: 👉 crawlspaceninja.com/supply 📞 Book a Personal Consultation with Michael: 👉 buymeacoffee.com/csninja Watch Next: ▶ Why Your Upstairs Is Hot Even With Good AC — [https://youtu.be/KrxE31tAHcY] ▶ Drafts Ruining Your Home? Seal These 4 Critical Attic Spots — [https://youtu.be/pMaEryXCsl0] ▶ How to Seal Attic Ductwork the Right Way — [https://youtu.be/NfTSBC46MhI] Join our Ninja membership to get early access to all our content: https://www.youtube.com/channel/UCIdzZrKCdyNf1Oh1cGjSYnA/join 20% OFF DIY Products Code: "youtube" Use at https://supply.crawlspaceninja.com 10% OFF DIY Mold Testing: https://fas.st/t/8cfyT8P3 **Contact Us:** * Website: (https://CrawlSpaceNinja.com/) * Schedule Free Inspection: (865) 659-0390 * DIY Store: (https://supply.crawlspaceninja.com) * DIY Store Phone: (865) 321-9314 **Disclaimer:** This information is for educational purposes only. Consult professionals for specific advice. Some links may be affiliate links, which means we may earn a small commission at no extra cost to you. #RadiantBarrier #HotUpstairs #AtticInsulation #CrawlSpaceNinja #MichaelChurch #HomeImprovement #DIYAttic #AirSealing #BuildingScience #IndoorAirQuality Support the show [https://buymeacoffee.com/csninja] Check out Michael's book, "Crawl Space Repair Myths-Busted [https://amzn.to/3llnB1m]" now available on Amazon! Schedule a consultation: https://buymeacoffee.com/csninja/extras [https://buymeacoffee.com/csninja/extras] Need help: https://crawlspaceninja.com [https://crawlspaceninja.com/] or https://supply.crawlspaceninja.com [https://supply.crawlspaceninja.com]

Why Your Upstairs Is Hot Even With Good AC

Send us Fan Mail [https://www.buzzsprout.com/2371248/fan_mail/new] Is your upstairs always hot even when your AC is running? You're not imagining it — 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. 🆓 FREE Attic Air Seal & Insulate Guide: 👉 https://buymeacoffee.com/csninja/e/478323 🛒 DIY Store — Professional-Grade Materials: 👉 crawlspaceninja.com/supply 📞 Book a Personal Consultation with Michael: 👉 buymeacoffee.com/csninja Support the show [https://buymeacoffee.com/csninja] Check out Michael's book, "Crawl Space Repair Myths-Busted [https://amzn.to/3llnB1m]" now available on Amazon! Schedule a consultation: https://buymeacoffee.com/csninja/extras [https://buymeacoffee.com/csninja/extras] Need help: https://crawlspaceninja.com [https://crawlspaceninja.com/] or https://supply.crawlspaceninja.com [https://supply.crawlspaceninja.com]

The Biggest Crawl Space Lie Homeowners Still Believe

Send us Fan Mail [https://www.buzzsprout.com/2371248/fan_mail/new] Crawl space vents don't dry out your crawl space — they make it worse. In this video, Crawl Space Ninja founder Michael Church explains why open crawl space vents cause mold, wood rot, and poor indoor air quality in your home. Learn the building science behind crawl space moisture, the stack effect, and the simple 3-step fix to seal your crawl space the right way. 🆓 Free Guide — Is Your Crawl Space Making Your Family Sick? The 4-Stage Warning Sign Checklist: 👉 buymeacoffee.com/csninja/e/521376 📚 Get complete guidance in my Gold Award Winning Book "Crawl Space Repair Myths Busted" (https://amzn.to/3llnB1m) Schedule a consultation, get a Crawl Space Inspection Sheet and more: https://buymeacoffee.com/csninja/extras Join our Ninja membership to get early access to all our content: https://www.youtube.com/channel/UCIdzZrKCdyNf1Oh1cGjSYnA/join 20% OFF DIY Products Code: "youtube" Use at https://supply.crawlspaceninja.com 10% OFF DIY Mold Testing: https://fas.st/t/8cfyT8P3 **Contact Us:** * Website: (https://CrawlSpaceNinja.com/) * Schedule Free Inspection: (865) 659-0390 * DIY Store: (https://supply.crawlspaceninja.com) * DIY Store Phone: (865) 321-9314 **Disclaimer:** This information is for educational purposes only. Consult professionals for specific advice. Some links may be affiliate links, which means we may earn a small commission at no extra cost to you. #crawlspaceninja  #CrawlSpaceNinja #IndoorAirQuality #HomeImprovement #BuildingScience #MoldPrevention #CrawlSpaceMoisture #DIY #HomeRepair #HealthyHome Support the show [https://buymeacoffee.com/csninja] Check out Michael's book, "Crawl Space Repair Myths-Busted [https://amzn.to/3llnB1m]" now available on Amazon! Schedule a consultation: https://buymeacoffee.com/csninja/extras [https://buymeacoffee.com/csninja/extras] Need help: https://crawlspaceninja.com [https://crawlspaceninja.com/] or https://supply.crawlspaceninja.com [https://supply.crawlspaceninja.com]