Loading…
Serving Duluth, MN and surrounding areas. (218) 514-1692
Duluth winters are long and brutal. If your home is cold in spots, dealing with ice dams, or running up heating bills that feel too high, the problem is almost always insulation. We fix that.
Duluth Insulation is a licensed insulation contractor serving Duluth, MN and 12 surrounding cities. We handle the problems that drive up your heating bills and make your home uncomfortable - drafts, ice dams, frozen pipes, and cold spots that never warm up. Our work covers all 16 insulation services, from spray foam and attic upgrades to crawl space encapsulation and commercial buildings. Every job starts with a free on-site assessment so we know exactly what your home needs before we recommend anything.
Gaps in your walls and rim joists leak heat fast in a Duluth winter. Spray foam expands to fill every crack, creating an airtight seal that fiberglass and blown-in can't match.
Learn More
Heat rises straight out of an under-insulated attic. We bring your attic up to the depth Duluth's climate demands, cutting heating bills and stopping ice dams before they start.
Learn More
Old compressed insulation does almost nothing. Blown-in material fills every corner of your attic evenly, restoring the thermal barrier your home needs through a seven-month heating season.
Learn More
Drafty rooms and climbing energy bills usually point to one thing - insulation that hasn't been updated since the house was built. We assess your whole home and fix what's actually causing the problem.
Learn More
Damaged, pest-contaminated, or vermiculite-laden insulation needs to come out before anything better goes in. We remove old material cleanly and leave the space ready for a proper upgrade.
Learn More
An uninsulated crawl space sends cold air straight into your floors and puts your pipes at risk in February. We insulate and seal crawl spaces so they stop working against you.
Learn More
Exterior walls in older Duluth homes are often completely empty inside. Dense-pack or blown-in wall insulation brings those cavities up to a standard that actually holds heat.
Learn More
You can pile on insulation all day, but drafts come from air moving through gaps - not missing R-value. We find and seal the leaks that keep your home cold even after other upgrades.
Learn More
Uninsulated basement walls and rim joists are among the biggest heat-loss points in older Duluth homes. Closed-cell foam in those areas keeps your basement warmer and your pipes safe.
Learn More
Closed-cell foam is the most moisture-resistant option available, making it ideal for basements and crawl spaces near Lake Superior. It also delivers twice the R-value per inch of fiberglass.
Learn More
Open-cell foam is a cost-effective way to insulate interior walls and attics where air sealing matters as much as R-value. Its spongy texture also reduces sound transfer between rooms.
Learn More
The gaps around attic light fixtures and plumbing bypasses undo most of the work your insulation is trying to do. Attic air sealing closes those paths so heat has nowhere to escape.
Learn More
Ground moisture rising through an unsealed crawl space causes mold, rot, and poor air quality throughout your home. A vapor barrier stops that moisture at the source.
Learn More
Moisture in walls and crawl spaces does slow, expensive damage over time. Proper vapor barrier installation keeps moisture out of places it should never reach.
Learn More
Older homes weren't built with today's energy standards in mind. Retrofit insulation upgrades add performance to existing walls and structures without a full gut renovation.
Learn More
Commercial buildings lose heat at scale, and every degree costs money. We insulate commercial properties across Duluth with the same care we bring to residential work.
Learn MoreYou reach out by phone or through the contact form, and our office follows up within 1 business day. We ask a few quick questions about your home and what you've been dealing with - cold rooms, high bills, ice dams - so we can come prepared. No sales pitch, no pressure. Just a conversation about what you need.
A member of our team comes to your home to look at the actual space - your attic, crawl space, basement, or walls, depending on what you described. We measure what's there, check for air leaks and moisture issues, and tell you in plain terms what we found. You get a written estimate before we leave, and you're under no obligation to move forward.
Once you decide to go ahead, we handle permits if required, schedule the crew, and complete the job cleanly and on time. Most projects finish in a single day. We walk you through the finished work, give you documentation for any rebate or tax credit claims, and leave the space better than we found it. Your home starts performing better immediately.
We hold a current Minnesota contractor license issued through the Department of Labor and Industry and carry full liability insurance and workers' compensation on every project. You can ask to see our license number before work begins.
We come to your home, look at the actual space, and give you a written estimate at no charge. There's no pressure to decide on the spot. Most estimates are scheduled within 3 to 5 days of your call.
We live and work here. We know what a Duluth winter does to a house, and we've seen every type of older home this city has to offer - from East Hillside bungalows to hillside Victorians. Local knowledge makes a real difference on these jobs.
Every project starts with a written quote that spells out exactly what will be done and what it costs. After the job, you get documentation of the installed depth and material - useful for utility rebates, federal tax credits, and future home sales.
Ready to get started? Call (218) 514-1692 or send us a message.
"We had ice dams every single winter for five years. After they insulated and air-sealed the attic, we went through last January with zero issues. Our heating bill dropped by about $80 a month compared to the year before."
Michael R., Duluth - Attic Insulation
"The crawl space under our 1940s house was a mess - no insulation, ground moisture, and the floors above it were ice cold in February. They cleaned it out, added spray foam to the rim joists, and put down a vapor barrier. Floors are completely different now."
Sarah T., Hermantown - Crawl Space Insulation
"They gave us a clear written estimate, showed up when they said they would, and walked us through everything when the job was done. We got the paperwork we needed for the Minnesota Power rebate. Straightforward from start to finish."
Dave K., Superior - Blown-In Insulation
We respond within 1 business day - often the same day. There's no obligation and no sales pressure. After you submit, someone from our office will call you to schedule a free on-site estimate at a time that works for you.
(218) 514-1692Duluth Insulation is based in Duluth, MN and serves 12 cities across northeastern Minnesota and northwestern Wisconsin, including Superior, Cloquet, and Hermantown. We can typically schedule same-week visits for most of our service area, and free estimates are available in all locations listed below.
Duluth sits in one of the coldest climate zones in the continental U.S. The Department of Energy recommends attic insulation depths here that are significantly higher than what warmer states require. Homes that fall short pay for it every month of an eight-month heating season.
Ice dams form when heat escaping through your attic warms the roof, melting snow that refreezes at the cold eaves. The fix isn't removing ice - it's keeping heat where it belongs. Proper attic insulation combined with air sealing stops the cycle at its source.
Insulation slows heat movement. Air sealing stops air movement. Both matter, but drafts specifically come from air moving through gaps - not from missing R-value. The two work best together, and skipping air sealing means your insulation underperforms from day one.
Closed-cell spray foam excels in tight spaces like rim joists and basement walls where moisture resistance matters as much as thermal performance. For open attics, blown-in at the right depth often delivers comparable results at a lower cost. The right choice depends on the specific location in your home.
Homes built before 1940 in neighborhoods like Congdon Park or the West End often have little or no insulation in rim joists, knee walls, or attic floors. The U.S. Department of Energy recommends that homes in this climate zone be brought up to today's standards - and the payback in Duluth's long heating season is faster than almost anywhere else in the country.
Yes. Minnesota Power offers rebates for Duluth homeowners who add attic insulation, and federal tax credits under the Inflation Reduction Act are also currently available for qualifying insulation improvements. These programs can be combined, meaningfully reducing your out-of-pocket cost. Ask your contractor whether the materials they use qualify before the job starts.
Duluth Insulation is a licensed and insured insulation contractor based in Duluth, MN, serving 12 cities across northeastern Minnesota and northwestern Wisconsin since 2023.
We hold a current Minnesota residential contractor license issued through the Minnesota Department of Labor and Industry, and we carry liability insurance and workers' compensation coverage on every project.
Since 2023, we have completed insulation projects across all 16 service types, working on homes ranging from 1900s East Hillside bungalows to newer construction near the Miller Hill corridor. Learn more about our team and approach.
Look into your attic. If you can see the wooden joists running across the floor, the insulation isn't deep enough for Duluth's climate. Those beams should be fully buried.
You'll still feel drafts. Air moves through gaps regardless of R-value. Sealing gaps first means your insulation actually delivers what it promises.
It can be. A documented insulation upgrade improves energy performance disclosures and can be a meaningful selling point in a market where buyers know what Duluth winters cost.
The ENERGY STAR Seal and Insulate guide is a reliable starting point for understanding what a fully insulated home looks like from the inside out. When you're ready to see what your specific home needs, call (218) 514-1692 for a free on-site estimate.
Duluth is Minnesota's fourth-largest city, built on a steep ridge above the western shore of Lake Superior. With a population of around 90,000, it's a working city with a distinctive character - a mix of historic neighborhoods, a working port, and one of the most recognizable skylines in the upper Midwest thanks to landmarks like the Aerial Lift Bridge and the waterfront at Canal Park. Duluth also averages around 86 inches of snow per year - one of the highest totals of any city in the continental U.S., according to NOAA's Duluth climate data.
A large share of Duluth's housing was built before 1960, during the city's iron ore and timber boom years. Neighborhoods like the East Hillside, Congdon Park, and the West End are filled with wood-frame homes from the 1890s through the 1950s - many of them still standing with their original plaster walls and limited or outdated insulation. The Glensheen Mansion on the shore of Lake Superior is a well-known example of the era's craftsmanship. The steep hillside terrain and the lake's influence on local weather - including heavy lake-effect snow on the city's eastern side - create conditions that are harder on homes here than in most of Minnesota.
Duluth Insulation works on all types of Duluth homes, from older stone and brick properties near the East End to newer ranch homes out by the Miller Hill corridor. We understand the specific challenges that come with this city's climate, housing stock, and geography - and we're ready to help with whatever your home needs.
By appointment only, no walk-ins.
Duluth Insulation
315 W 3rd St
Duluth, MN 55806
Call or send a message today and we will schedule your free on-site estimate within a few days - before the next Duluth cold snap hits.