Question 1

What is spray foam insulation and how does it work?

Accepted Answer

Spray foam is a liquid insulation that expands and cures in place. As it expands, it fills gaps and cracks and seals them, then hardens into an insulating layer. That is its key advantage: it air-seals and insulates in a single pass, which stops both the heat that moves through materials and the heat carried by leaking air. In a Minnesota climate, where air leakage is a big source of heat loss, that combination is hard to beat.

Question 2

What is the difference between open-cell and closed-cell spray foam?

Accepted Answer

Closed-cell foam is dense and rigid, with a high R-value per inch, a built-in vapor retarder, and added strength. Open-cell foam is lighter and spongy, a cost-effective air seal that dampens sound well but does not control moisture. We use closed-cell in rim joists, crawl spaces, and basements, and open-cell in interior walls, ceilings, and vaulted roofs. Many homes use both, matched to each area.

Question 3

How much does spray foam insulation cost?

Accepted Answer

It depends on the area, the foam type, the thickness needed, prep, and access. As a general industry reference, open-cell foam often runs roughly $0.45 to $1.50 per board foot and closed-cell roughly $1.00 to $2.50, but your project may fall outside those ranges. The only accurate number comes from a free on-site estimate, which we provide with no obligation.

Question 4

What R-value does spray foam provide?

Accepted Answer

Closed-cell foam delivers roughly R-6 to R-7 per inch, the highest of any common insulation, while open-cell runs about R-3.5 to R-4 per inch. Because closed-cell reaches a given R-value in less thickness, it is ideal where space is tight, like rim joists. We spec the foam type and thickness to hit a proper R-value for the Minnesota climate zone.

Question 5

Will insulation help prevent ice dams?

Accepted Answer

In most cases, yes. Ice dams form when heat leaking into the attic warms the roof deck, melts snow, and lets the water refreeze at the cold eaves. Air-sealing and properly insulating the attic keeps the roof deck cold, which addresses the root cause. That protects your shingles, gutters, and framing from the damage ice dams cause.

Question 6

Why is my pole barn or metal building dripping water?

Accepted Answer

That is condensation. Warm, moist interior air hits the cold steel panels and roof deck, where it condenses and drips. It is one of the most common problems in uninsulated metal buildings. Closed-cell spray foam stops it by sealing the warm air off the cold steel, so the panels stay dry and the building becomes usable and heatable.

Question 7

Can you add spray foam to an existing home or building?

Accepted Answer

Yes. We insulate existing homes, additions, pole barns, and commercial buildings regularly. In open assemblies like attics, crawl spaces, rim joists, and metal buildings, foam applies directly to the framing or panels. Where cavities are already closed behind drywall, we will assess the space and recommend the best approach during the estimate.

Question 8

Is spray foam insulation safe once it is installed?

Accepted Answer

Once spray foam has been properly installed and fully cured, it is inert and stable in the building. During installation, our crew follows the manufacturer's guidance and safety practices, and we ask that the area be vacated for the curing period specified for the product. We will walk you through what to expect before we start.

Question 9

How long does a spray foam job take?

Accepted Answer

It depends on the size and complexity of the project. Many residential jobs like a rim joist, crawl space, or attic can be completed in a day, while whole-home new construction or a large commercial building takes longer. We give you a clear timeline as part of your estimate so you know what to expect.

Question 10

Do you offer free estimates, and what area do you serve?

Accepted Answer

Yes, our estimates are free and there is no pressure to move forward. Because foam pricing depends on the specifics of a space, we provide a clear written estimate after an on-site visit. We are based in Savage and serve homeowners and businesses statewide across Minnesota.

Question 11

Is Trust Works insured?

Accepted Answer

Yes. Trust Works Company is fully insured and carries insurance on every job. That means the work inside your home or building is backed by proper coverage, so you can hire us with confidence.

Insulation questions,answered.

Still have a question?