Barndominium Insulation Solutions Built for Tennessee & North Carolina Builders – by Mullins Company

If you’re building barndominiums in Tennessee or Western North Carolina, insulation is one of the most important decisions you’ll make. With metal buildings, it’s not just about comfort — it’s about controlling moisture, meeting code, and delivering long-term performance.

At Mullins Company, we specialize in insulation systems designed specifically for barndominiums. Whether you’re framing your first metal home or managing multiple builds a year, our team helps you get it done right the first time.

Barndominiums are unique — and so are we. Here’s what sets us apart:

• Specialists in Metal Building Insulation
  Mullins Company understands the challenges of metal structures, including condensation control, thermal bridging, and long-term energy performance.
• Reliable Scheduling and Fast Turnarounds
  Mullins Company works around your timeline to help you stay on track for inspections and closings.
• Professional, Insured Crews
  Our installers at Mullins Company are trained, respectful, and keep job sites clean and ready for clients and inspectors.
• Flexible Systems to Match Your Budget
  Mullins Company offers multiple insulation options, including high-performance spray foam and hybrid systems, tailored to your project’s needs.

Why We Recommend Open Cell Spray Foam for Barndominiums

Open cell spray foam is our most popular at Mullins Company, and the recommended insulation choice for barndominiums in Tennessee and Western North Carolina. Here’s why:

• Creates an Air Barrier
  Open cell foam expands to seal cracks, gaps, and voids, forming a continuous air barrier that improves energy efficiency and indoor comfort.
• Cost-Effective and Code-Compliant
  We can install open cell foam to code-compliant R-values at a more economical price point compared to closed cell foam — making it ideal for budget-conscious barndominium projects.
• No Vapor Barrier Needed in Our Climate
  In IECC Climate Zone 4 (which includes most of Tennessee and Western NC), open cell foam performs exceptionally well without the need for a separate vapor barrier. The vapor drive in this zone isn’t strong enough to require closed cell foam for moisture protection.
• Perfect Fit for Metal Buildings
  Open cell foam reduces noise transfer, provides excellent coverage in metal framing cavities, and helps minimize condensation risk when installed properly.

Note: For projects in colder climates — IECC Climate Zone 5 and above — we may recommend closed cell foam for its vapor barrier and higher R-value per inch.

Other Insulation Options Mullins Company Offers

While open cell foam is our go-to solution, we also offer alternative systems when project specs require them:

Closed-Cell Spray Foam

• Built-in vapor barrier for high-humidity or high-altitude zones
• Adds structural rigidity to metal panels
• Maximum R-value per inch

Hybrid Systems (Spray Foam + Batts)

• Closed-cell foam for air and moisture sealing
• Fiberglass or Rockwool batts for added R-value
• Ideal for large barndos or phased builds

Serving Builders Across Tennessee & Western North Carolina

From Knoxville to Asheville, Mullins Company is your local expert for barndominium insulation. We serve:

• East Tennessee – Knoxville, Sevierville, Johnson City, Maryville, Greeneville, Bristol, Morristown
• Western North Carolina – Asheville, Boone, Hickory, and surrounding areas

Let’s Talk About Your Next Barndo Project

At Mullins Company, we’re more than a subcontractor — we’re a partner. From the initial bid to the final walkthrough, we help you build homes your clients will love.

Call us today:
📞 Tennessee & Virginia: (423) 378-3737
📞 North Carolina: (828) 303-2001

Barndominium Insulation in Tennessee & North Carolina