📞 406-939-8301 clifton@machinegunsprayfoam.info 📍 Glendive, MT · Serving MT / ND / SD / WY
Spray foam applied at an attic roofline
Veteran-Owned · BPI-Certified · MT · ND · SD · WY

Attic Spray Foam Insulation

The attic is usually the single biggest heat-loss path in a building. Seal and insulate it right and everything below gets easier to heat and cool.

Why the attic

Warm air leaves through the top

Warm air rises and pushes out through every gap at the top of a building — the "stack effect." That pull drags cold air in low and drives your heating bill up all winter. Spray foam air-seals and insulates in one pass, closing the leaks that batt insulation just sits on top of. In our climate, a tight attic is one of the highest-impact upgrades you can make.

ROOFLINE

Conditioned attic

Spray the underside of the roof deck to bring the attic inside the insulated envelope — the right move when HVAC equipment or ductwork lives up there.

ATTIC FLOOR

Vented attic

Seal and insulate the ceiling plane and keep the attic vented — a cost-effective option when the attic is just storage.

AIR-SEAL

Stops the leaks

Foam self-flashes around top plates, wire and pipe penetrations, and can lights — the exact spots where heat escapes.

Related

Spray foam topics

Questions

Common questions

Should the foam go on the attic floor or the roofline?

Both work — it depends on the building. Spraying the roofline brings the attic inside the conditioned envelope (great when ducts or equipment live up there); spraying the attic floor keeps the attic vented and seals the ceiling below. We'll assess yours and tell you which fits.

Why is the attic worth doing first?

Heat rises, so the attic is usually the single biggest air-leak and heat-loss path in a building. Sealing and insulating it well is often the highest-impact place to start.

Open-cell or closed-cell in an attic?

Both are used in attics. Closed-cell gives more R per inch and adds a moisture barrier; open-cell fills large volumes cost-effectively. See our open-cell vs closed-cell breakdown, and we'll match it to your attic.

Do I need a radiant barrier in my attic?

Radiant barriers reflect radiant heat and do the most in hot, sunny climates with a big attic cooling load. Up here in the cold Northern Plains, the bigger win is air-sealing and R-value — which spray foam delivers in one step — so a radiant barrier is usually a lower priority than sealing and insulating the attic properly. If yours is one of the cases where it helps, we'll tell you straight.

What areas do you serve?

Montana, North Dakota, South Dakota and Wyoming, based out of Glendive, MT. Call 406-939-8301 for current lead times.

Get a free attic assessment

Tell us about your attic — we'll give you straight numbers, no upsell.

📞 Call or text 406-939-8301