In this detailed technical walkthrough of one of our most ambitious projects to date, we explore the critical intersection of building science and mechanical engineering within a massive 10,000 square foot Sports Barndominium that pushes the boundaries of high-performance construction.

When dealing with a structure of this magnitude—especially one featuring an advanced hybrid steel frame—the primary goal is creating a superior building enclosure that functions as a continuous airtight seal from the ground up to the peak of the roof.

We begin by focusing on the exterior shell, where the Huberwood Zip System serves as the foundation for our air sealing strategy. Without a tight enclosure, even the most advanced HVAC system will struggle to maintain efficiency and comfort.

On this build, we utilized the Zip System high-temp peel-and-stick underlayment across the entire roof deck. This self-adhering membrane withstands temperatures up to 260°F, vital for the black standing seam metal roof. Its self-healing properties ensure every fastener penetration remains watertight, while the split backing allows smoother installation even on large projects.

To enhance thermal performance and roof longevity, we installed vertical furring strips over the membrane, creating a dedicated drainage plane and radiant barrier effect, providing crucial separation between the metal substrate and the building enclosure.

Once the shell is fully encapsulated, we move into indoor air quality and climate control with Ken Davis from Performance Air Conditioning of Texas. Conditioning a space that includes a 5,000 square foot gymnasium alongside luxury living quarters presents immense challenges.

Because this sports barndominium features four large overhead doors that will be frequently opened and closed, the mechanical design had to account for massive fluctuations in latent heat and moisture levels, using 15 tons of air conditioning for the gym area alone. We explored why relying solely on variable-speed units is often a mistake in high-performance builds, especially in Texas humidity, where dedicated dehumidification is essential for protecting hardwood sports flooring and preventing mold growth.

We walked through the installation of Santa Fe whole-home dehumidifiers, piped directly into the hard duct plenums with backdraft dampers, allowing independent operation from the cooling cycle to maintain precise humidity set points year-round.

Additionally, we installed Broan AI series Energy Recovery Ventilators (ERVs), the lungs of the home, providing constant filtered fresh air while exhausting stale air from wet areas like locker rooms and laundry spaces. These ERVs are self-balancing, constantly monitoring pressure resistance to maintain neutral pressure, preventing unconditioned outside air infiltration.

By combining a rigid airtight Zip System shell with a sophisticated array of dehumidifiers and ERVs, this project delivers an environment that is both energy-efficient and exceptionally healthy for occupants. This serves as a masterclass in scaling residential building science for large industrial-style structures and underscores the importance of working with specialized contractors who understand how these systems work in harmony to achieve true high-performance results.