Loading...
Serving Duncan, OK and surrounding areas. (580) 860-0708
Stop paying to heat and cool the gaps in your home. Duncan Insulation installs spray foam, attic, crawl space, and more - done right the first time.
Duncan Insulation is a licensed insulation contractor based in Duncan, OK, serving 12 communities across south-central Oklahoma since 2016. We offer 16 insulation services - from spray foam and blown-in attic insulation to crawl space encapsulation and commercial projects. Whether your home is drafty in winter, overheating in summer, or just running up higher bills than it should, we find the problem and fix it with materials and methods that last.
High energy bills every summer? Spray foam seals every gap it touches, cutting air leakage and cooling costs in one step.
Learn More
Attic too hot in July? Proper attic insulation keeps heat from pouring into your living space and reduces what your AC has to fight.
Learn More
Old insulation looking thin and flat? Blown-in fills around obstacles and covers the whole attic floor evenly without tearing out your ceiling.
Learn More
Whole-home comfort starts with knowing which areas are losing the most energy - we assess and insulate the spots that matter most.
Learn More
Wet, damaged, or pest-ridden insulation needs to come out before new material goes in. We remove it cleanly and prep the space right.
Learn More
Cold floors in winter? An uninsulated crawl space transfers that cold directly into your living space - we seal and insulate it properly.
Learn More
Exterior walls with no insulation let heat in during summer and cold in during winter. Wall insulation is one of the quieter upgrades that pays off consistently.
Learn More
Insulation slows heat - air sealing stops drafts. Gaps around lights, plumbing, and hatches can cancel out even good insulation.
Learn More
Basement walls and rim joists are a common source of cold air in winter. Insulating them right makes the rest of the home perform better.
Learn More
Need a moisture barrier and air seal in one? Closed-cell foam is the best fit for crawl spaces, rim joists, and Oklahoma's humidity swings.
Learn More
Open-cell foam is ideal for attics and interior walls where you need sound control and air sealing without the cost of closed-cell.
Learn More
Commercial buildings leak energy at a larger scale. We handle spray foam and insulation for shops, offices, and industrial spaces across the region.
Learn More
Moisture rising from bare Oklahoma soil is one of the top causes of crawl space problems. A proper vapor barrier stops it at the source.
Learn More
Vapor barriers protect your insulation and framing from the moisture that Oklahoma clay soils constantly push upward. We install them to last.
Learn More
Before new insulation goes in, gaps around lights and plumbing penetrations should be sealed - or you lose much of the benefit.
Learn More
Older homes with finished walls can still get upgraded insulation through injection or blown-in methods - no demolition required.
Learn MoreFrom your first call to a finished job - here is what to expect.
Reach out by phone or the contact form. We will ask a few basic questions - the age of your home, which areas you are concerned about, and what problems you have noticed. We respond within 1 business day and can usually schedule an in-person visit within the same week.
We come out and look at the actual space - your attic, crawl space, walls, or wherever the problem is. We check existing insulation levels, look for moisture or air leak issues, and measure the area. This visit is free, and we explain what we find in plain language - not contractor jargon. You get a written estimate with no obligation.
Once you approve the plan, we schedule the installation. The crew arrives, handles all setup and cleanup, and finishes the job - most projects wrap up in one to two days. Before we leave, we walk you through what was done and answer any questions. You will know exactly what was installed and where.
We operate under Oklahoma Construction Industries Division licensing requirements. Every project carries full liability and workers compensation coverage - no exceptions, regardless of job size.
We do not quote over the phone without seeing the space. Every estimate starts with a free visit to your home. You get a written, itemized proposal - and you decide whether to move forward, on your timeline.
We are a local business, not a franchise. Our office is at 1009 W Pecan Ave in Duncan. We know the older housing stock, the clay soil conditions, and the climate demands that come with south-central Oklahoma.
We respond to every inquiry within 1 business day. For most jobs in the Duncan area, we can schedule the estimate visit within the same week you reach out. No long waits, no automated phone trees.
Ready to talk? Call (580) 860-0708 or send us a message.
"Our electric bill dropped noticeably the first summer after they did the attic. The crew showed up when they said they would, finished in one day, and cleaned up everything before they left. Getting the estimate was easy - they came out, looked at everything, and gave us a clear written quote."
James T., Duncan - Spray Foam Insulation
"We had a crawl space that was cold and musty every winter. After they sealed and insulated it, the floors above feel completely different. They walked us through what they found before starting - there were some moisture issues they flagged and addressed as part of the job."
Rhonda M., Lawton - Crawl Space Insulation
"I called a few contractors and Duncan Insulation was the only one who actually came out to look at my attic before quoting. Everyone else gave me a price over the phone. They found some old damaged insulation that needed to come out first, explained why, and the final bill matched the estimate exactly."
Carl B., Chickasha - Attic Insulation
We respond within 1 business day - no automated systems, just a real person from our office. There is no obligation, and nothing happens until you decide to move forward. After you submit, someone from our team will call to schedule a free on-site visit so we can see your home and give you an accurate written estimate.
(580) 860-0708Duncan Insulation serves 12 communities across south-central Oklahoma from our office in Duncan. In addition to Duncan, we regularly work in Lawton, Chickasha, Anadarko, Marlow, and surrounding towns throughout Stephens, Grady, Comanche, and Garvin counties. Most estimate visits can be scheduled within the same week you reach out.
Real answers to the questions homeowners ask before they call.
If your air conditioner runs almost continuously but certain rooms stay warm, the most common cause is an under-insulated attic letting outside heat pour in from above. Duncan sits in Climate Zone 3, where the DOE recommends attic insulation rated R-38 to R-60 - most older homes in the area have far less than that.
Oklahoma is one of the windiest states in the country, and wind actively pushes outside air through gaps around electrical boxes, framing joints, and attic penetrations. Insulation slows heat - but air sealing stops the drafts. The two work together, and skipping air sealing leaves a significant amount of the benefit unrealized.
For most Duncan homes on pier-and-beam foundations, the crawl space is a major source of cold floors in winter and moisture all year. Attic insulation usually delivers bigger energy savings, but crawl space work is often the more urgent fix for comfort and moisture protection. A good contractor will assess both and tell you which is the higher priority for your home specifically.
Older homes built before modern energy codes are some of the best candidates for insulation upgrades because they typically started with so little. Homes from the 1940s through 1970s in Duncan were often built with minimal attic coverage and no wall or crawl space treatment. Bringing them up to current standards can make a significant difference in both comfort and monthly bills. The U.S. Department of Energy provides detailed guidance on recommended insulation levels by climate zone.
Blown-in is the most common choice for adding insulation to an existing attic floor because it is fast, affordable, and fills around obstacles well. Spray foam is the better choice when you want to insulate the attic roof deck - turning the attic into conditioned space - or when you need a moisture barrier as part of the insulation job. The right answer depends on your home layout and your goals.
Oklahoma storm season can leave behind moisture damage in an attic that is not visible from inside the home. Insulation that got wet after a roof impact loses most of its effectiveness and can develop mold over time. Adding new insulation on top of damaged material traps the problem rather than fixing it. A post-storm attic check - especially before adding insulation - is one of the most important steps a homeowner can take.
Duncan Insulation is a licensed, insured insulation contractor company based in Duncan, OK, serving 12 cities and communities across south-central Oklahoma since 2016.
We hold the required contractor license issued through the Oklahoma Construction Industries Division, and every job is fully covered by liability and workers compensation insurance. We operate under Oklahoma state licensing requirements for insulation and weatherization work.
Since 2016, we have completed insulation projects across all 16 of our service types - from single-room spray foam jobs to full-home encapsulation projects on older pier-and-beam homes common to the Duncan area.
Want to learn more about our team and how we work? Read about Duncan Insulation.
Common questions from Duncan homeowners before they hire an insulation contractor.
If your home is more than 30 years old and the attic has never been inspected, the insulation may have settled, compressed, or been damaged by moisture or pests. A contractor can tell you in minutes whether what is there is still doing its job - or whether adding to or replacing it makes more financial sense.
Homeowners who add qualifying insulation to their primary residence may be eligible for a federal energy efficiency tax credit. The IRS Energy Efficient Home Improvement Credit can be worth up to 30% of the project cost with an annual cap. Ask your contractor which products qualify and confirm the details with a tax professional before filing.
Most homeowners who upgrade an under-insulated attic or crawl space notice the difference in comfort within the first few weeks - especially in rooms that were previously hard to keep at a consistent temperature. The energy bill savings tend to show up clearly within the first full summer or winter after the work is done.
Questions about your specific home? Call us at (580) 860-0708 or request a free on-site estimate.
Duncan is a city of about 22,000 people in Stephens County, in south-central Oklahoma, roughly 80 miles south of Oklahoma City. The city grew up around the oil industry - Halliburton was founded here in 1919 and is the most well-known piece of that history. Duncan is the county seat, which means it anchors a traditional downtown grid with a courthouse square surrounded by established neighborhoods on smaller lots. Most people here have lived here a long time, own their homes, and take care of them.
The older neighborhoods near the downtown core and the Stephens County Courthouse include many homes built in the 1920s through 1950s with wood-frame construction, original brick exteriors, and foundations that have been in the ground for 70 years or more. Roofs, windows, and insulation in these homes are frequently original or only partially updated. The Chisholm Trail Expo Center and Lake Duncan are well-known local landmarks that frame the community character - from the historic core to the newer subdivisions spreading out toward the north and east sides of the city.
The soil in Stephens County is heavily clay-based, which means it swells when wet and shrinks when dry. That constant movement puts stress on foundations and floor framing over time, and it also makes crawl spaces here especially prone to moisture infiltration year-round. Duncan summers regularly push past 100 degrees Fahrenheit, while winters can bring hard freezes with little warning. That combination - expansive clay soils, wide temperature swings, and a large share of older housing stock - is exactly the environment where proper insulation makes the biggest difference. Duncan Insulation has been working on homes across Stephens County since 2016, and we understand what these homes need.
By appointment only, no walk-ins.
Duncan Insulation
1009 W Pecan AveDuncan, OK 73533(580) 860-0708sales@duncaninsulation.comDuncan Insulation provides free on-site estimates for homeowners across Duncan and south-central Oklahoma. Call today or fill out our contact form and we will respond within 1 business day.