Inside a 4,004 sqft Post-Frame Barndominium in Merlin, Ontario

This is the build that started IronField. The IronField founder designed, engineered, and built it as both the builder and the mechanical contractor — a 4,004 sq ft post-frame barndominium in Merlin, Ontario that became the reference project behind the entire IronField planning system.

Systems-first, from the slab up

Every mechanical decision on this build was made before the concrete was poured. The result is a home where the systems drive the floor plan, not the other way around:

• 5-zone radiant in-floor heat across the living space
• Hybrid heating — an air-source heat pump paired with an IBC combi-boiler
• HRV ventilation for balanced, filtered fresh air
• A fully heated and cooled shop integrated with the living envelope
• Smart-home automation and full air-quality monitoring
• Perma-Column foundation construction
• A 600 ft French drain system engineered for long-term water management

Why it matters

On a slab-on-grade build, the slab is permanent. Plumbing rough-ins, radiant loops, electrical conduit, and anchor placement all have to be right the first time — there is no basement to go back into. Mapping every one of those decisions ahead of the pour is exactly what the IronField pre-pour checklist was built to do.

The build has been featured in Plumbing & HVAC Magazine and The Drive Magazine as a case study in mechanical-first rural construction.