Metal Buildings
Metal Building Insulation with Closed-Cell Spray Foam
Closed-cell metal building insulation is the best way to insulate workshops, garages, barndominiums, and storage buildings. At Truly Sealed Insulation, we help Florida property owners protect their buildings from moisture, heat, and energy loss — using spray foam that lasts for decades.
Why Metal Building Insulation Matters with Closed-Cell Foam
Closed-cell spray foam adheres directly to metal walls and ceilings, forming a durable air and moisture barrier. It eliminates condensation — a common issue in Florida’s humidity — and outperforms traditional fiberglass.
- 100% air and moisture seal
- Up to 300% added structural strength
- Prevents rust, mold, mildew, and pests
- Boosts energy efficiency year-round
- Insulation that lasts the lifetime of the building
- No more sagging or falling insulation like fiberglass batts
Closed-Cell vs. Open-Cell Foam for Metal Buildings
Not all spray foams are created equal. While open-cell may work for interior walls, it’s not recommended for metal structures.
Closed-cell foam is:
- Water-resistant
- More rigid and dense
- A true vapor barrier
- Ideal for bare steel surfaces
Open-cell foam:
- Absorbs moisture
- Can promote rust or mold
- Doesn’t provide structural support
If you’re insulating a metal building, closed-cell foam is the clear choice.
Perfect For Shops, Barns, and Barndominiums
We insulate a wide range of steel structures, including:
- Garages and hobby shops
- Agricultural barns and storage sheds
- Metal warehouses and airplane hangars
- Barndominiums and converted living spaces
Whether you're working with a new build or retrofitting an older structure, we make sure it’s sealed tight.
Why Contractors & Property Owners Choose Truly Sealed
- Specialization in metal building insulation
- Reliable scheduling and quick turnaround
- Clear, competitive pricing
- Discounts for projects over 2,000 sqft
- Deep understanding of Florida’s weather and code requirements
We don’t just spray foam — we seal buildings for comfort, savings, and long-term durability.
FAQ: Metal Building Insulation
How thick should spray foam be in a metal building?
We typically recommend 2 inches of closed-cell foam for optimal moisture control, air sealing, and insulation value.
Can spray foam go directly on metal?
Yes. Closed-cell spray foam is applied directly to the metal and expands into every gap, creating a seamless barrier.
Is a vapor barrier needed?
No. Closed-cell foam acts as its own vapor barrier, unlike traditional fiberglass or open-cell insulation.
Can I use open-cell foam in a metal building?
It’s not ideal. Open-cell foam absorbs moisture and can lead to rust or mildew in unventilated metal spaces.
What’s the cost of metal building insulation?
Expect around $2.00–$2.80 per square foot for 2 inches of closed-cell foam. Larger buildings may qualify for volume pricing — reach out for a quote.