Why build a sealed (unvented) crawl space instead of a vented one? In this video, we break down the real benefits: better indoor air quality, lower energy bills, mold prevention, and a healthier home.

After framing and building hundreds of homes, we’ve learned why vented crawl spaces often don’t perform as intended—and why modern building science points to sealed assemblies as the smarter choice.

We’ll cover:

• Vented vs. unvented crawl spaces (and what building codes actually say)
• Benefits for energy savings and occupant comfort
• Mineral wool insulation for fire safety and durability
• Vapor barriers, radon mitigation, and dehumidifiers explained
• Real-world installation details from our jobsite

Whether you’re a builder, architect, or homeowner, understanding crawl space design is key to building healthier, longer-lasting homes.

Resources mentioned:

• Build Show Network
• Green Building Advisor
• Building Science Corporation

Drop your crawl space questions in the comments—we’ll try to tackle them in a future video.