Selecting the right attic insulation companies can seem daunting, but it’s imperative to choose one that has a strong reputation, proper certification, and can provide tailored solutions to meet your specific needs.
If you’re considering improving your home’s energy efficiency, starting with the attic is one of the smartest and most cost-effective upgrades you can make.
The attic is often the biggest source of energy loss in a home, allowing heat to escape in the winter and making your air conditioning work harder in the summer.
By properly insulating your attic, you can reduce energy bills, improve indoor comfort, and extend the life of your HVAC system.
Attic insulation isn’t just about keeping warm or cool—it’s a long-term investment in home performance, environmental sustainability, and property value. But to get the most out of this upgrade, it’s crucial to work with a trusted and experienced insulation contractor.
Whether you’re dealing with fiberglass batts, blown-in cellulose, or modern spray foam solutions, the quality of the installation is just as important as the materials used.
In this guide, we’re highlighting the Top 10 Attic Insulation Companies in the U.S. These companies were selected for their excellent customer service, proven results, industry certifications, and innovative insulation solutions. If you’re ready to make your home more energy-efficient, this list is the perfect place to start.
Read also – 10 best Hackathon ideas for IT Company In 2025
What is Attic Insulation?
Attic insulation is a layer of material installed in the attic space of a home to reduce heat transfer between the interior and exterior. It plays a crucial role in maintaining consistent indoor temperatures, lowering energy bills, and improving overall comfort throughout the year.
By preventing heat from escaping during the winter and keeping hot air out in the summer, attic insulation reduces the strain on HVAC systems, leading to increased energy efficiency.
Common types of attic insulation include fiberglass batts, blown-in cellulose, spray foam, and reflective barriers. The right choice depends on your climate, budget, and the structure of your home.
Proper installation is essential to maximize performance, which is why many homeowners turn to professional attic insulation companies.
These experts assess your current insulation, recommend the most suitable materials, and ensure correct application. With the right attic insulation in place, you can enjoy long-term energy savings and enhanced indoor comfort.
Read also – Top 10 AC Repair Companies in the US | 2025 Updated List
Top 10 Attic Insulation Companies in the US
Here are the Top 10 Attic Insulation Companies in the U.S. (2025)—leading providers selected for their skill, reliability, coverage, and insulation innovation:
1. Koala Insulation
Koala Insulation has quickly become one of the most recognized attic insulation companies in the U.S., thanks to its rapid expansion and dedication to customer satisfaction.
With over 100 locations nationwide, Koala offers a full suite of insulation solutions, including spray foam, blown-in cellulose, and traditional batt insulation. Their services are designed to enhance energy efficiency, reduce utility bills, and improve indoor comfort throughout the year.
What sets Koala apart is their commitment to quality and transparency. Every project comes backed by strong warranties, and their team conducts thorough assessments to tailor insulation strategies to each home’s unique needs.
With more than 13,000 positive customer reviews, Koala Insulation is widely praised for its professionalism, punctuality, and clean installations.
Whether you’re upgrading an older home or building new, Koala is one of the top attic insulation companies to consider for reliable, long-lasting results and expert service across multiple states.
2. USA Insulation
USA Insulation is one of the most trusted attic insulation companies in the United States, with a strong presence across 63 locations and a track record of serving over 150,000 homes. Specializing in foam injection, blown-in insulation, and air sealing, the company focuses on maximizing home energy efficiency and comfort.
What sets USA Insulation apart is its proprietary foam insulation, engineered for superior thermal protection and coverage.
This foam not only seals gaps and cracks effectively but also provides long-lasting performance by reducing drafts and regulating indoor temperatures year-round. Their solutions are ideal for both existing homes and new construction.
With a commitment to professional service and customer satisfaction, USA Insulation offers free consultations, transparent pricing, and expert installation.
Their wide-ranging expertise and dependable service make them a go-to choice for homeowners seeking reliable attic insulation companies that deliver energy savings, comfort, and quality workmanship at scale.
3. Dr. Energy Saver
Praised by Bob Vila as one of the top overall insulation providers in the country, Dr. Energy Saver has earned its reputation among leading attic insulation companies through its comprehensive, whole-home energy solutions.
The company specializes in attic insulation, air sealing, and HVAC optimization—making it a one-stop-shop for improving energy efficiency and indoor comfort.
What sets Dr. Energy Saver apart is its focus on building science. Their technicians are trained to evaluate the home as a complete system, ensuring that insulation upgrades in the attic are properly integrated with ventilation and HVAC performance. This approach not only reduces energy bills but also improves air quality and temperature control.
With a network of locally owned franchises operating nationwide, Dr. Energy Saver delivers consistent service backed by professional expertise.
Whether you’re dealing with fluctuating indoor temperatures or high utility costs, they remain a top choice for homeowners seeking full-service attic insulation companies.
4. iFOAM
iFOAM stands out as one of the top attic insulation companies in the U.S., known for its specialization in high-performance spray foam insulation. Certified by the Insulation Contractors Association of America (ICAA) and the Spray Polyurethane Foam Alliance (SPFA), iFOAM adheres to the highest industry standards in both product quality and installation practices.
The company offers a range of services including attic insulation, wall insulation, and crawl space encapsulation. Their spray foam solutions are designed to create airtight seals, which significantly reduce energy loss, control moisture, and improve indoor air quality.
iFOAM’s expert technicians provide thorough home assessments and tailor insulation strategies to meet the specific needs of each property.
With comprehensive warranties and a focus on long-term performance, iFOAM has built a reputation for professionalism, efficiency, and results.
For homeowners seeking a modern, energy-efficient solution, iFOAM is a go-to name among reliable attic insulation companies across the country.
5. The Home Depot (Installation Services)
The Home Depot is a major national player among attic insulation companies, offering reliable installation services at competitive prices ranging from $1.50 to $2.45 per square foot.
With a vast network of certified local contractors, The Home Depot ensures that homeowners receive high-quality service backed by one of the most trusted retail brands in the country.
Their attic insulation services include blown-in fiberglass and cellulose options, tailored to boost energy efficiency, reduce heating and cooling costs, and improve overall home comfort.
One of the key advantages of choosing The Home Depot is price transparency—customers receive free in-home consultations, clear estimates, and access to financing options.
In addition to installation, The Home Depot provides insulation materials for DIY projects and connects homeowners with professionals for more complex needs.
Thanks to its accessibility, consistent service quality, and brand reliability, The Home Depot remains a top choice among national attic insulation companies in 2025.
Read also – Top 10 Fire Alarm Companies in the US | 2025 Updated List
6. Owens Corning
Owens Corning is one of the most influential names among attic insulation companies, known globally as the largest manufacturer of fiberglass composite materials. Their insulation products are a staple in homes across the U.S., valued for high R-values, consistent quality, and long-term durability.
Specializing in fiberglass batts and loose-fill insulation, Owens Corning offers solutions that improve energy efficiency, reduce noise, and create a more comfortable living environment.
Their products are widely trusted by contractors and homeowners alike due to their proven performance and compliance with industry standards.
What sets Owens Corning apart is its deep commitment to innovation and sustainability. The company continually develops materials that enhance thermal efficiency while reducing environmental impact.
Whether you’re insulating a new attic or upgrading an existing one, Owens Corning’s materials remain a top choice for high-performance, cost-effective results.
As both a manufacturer and a brand trusted nationwide, they stand out among leading attic insulation companies in 2025.
7. Knauf Insulation
Knauf Insulation is a prominent name among top attic insulation companies, known for producing high-performance fiberglass and mineral wool insulation for both residential and commercial applications.
As one of the largest insulation manufacturers in the U.S., Knauf delivers materials that combine energy efficiency, fire resistance, and sound control, making them ideal for attics and other critical areas of the home.
What distinguishes Knauf is its commitment to sustainability. Their EcoBatt® insulation, made with a bio-based binder and recycled content, is Greenguard-certified and free from formaldehyde, making it a healthier choice for homeowners and installers alike.
The company also emphasizes durability and consistent thermal performance across a wide range of climates.
Whether used in new construction or retrofit projects, Knauf’s insulation materials are trusted by contractors nationwide for their ease of installation and effectiveness.
For those seeking high-quality, environmentally conscious options, Knauf remains a top contender among American attic insulation companies.
8. Carlisle Companies
Carlisle Companies is a standout among attic insulation companies, particularly in the commercial and industrial sectors.
Specializing in high-performance insulation solutions, Carlisle is known for its advanced spray polyurethane foam systems, air and vapor barriers, and roofing insulation products used in large-scale construction and retrofit projects.
Their insulation materials are engineered for superior energy efficiency, moisture control, and structural durability—making them ideal for commercial attics, warehouses, and institutional buildings.
Carlisle’s building envelope solutions are widely adopted across the U.S. due to their ability to meet stringent building codes and enhance the long-term performance of roofing and insulation systems.
The company’s strong focus on innovation and sustainability has positioned it as a leader in green building practices.
Contractors and project managers rely on Carlisle for consistent quality and technical support, especially in complex or large-scale installations. For commercial-grade projects, Carlisle remains a top-tier name among specialized attic insulation companies in 2025.
9. Power Home Remodeling Group
Power Home Remodeling is a major force among attic insulation companies, offering insulation as part of its broader suite of energy-efficient home remodeling services.
With over $1 billion in annual revenue, the company operates at a national scale and has built a reputation for delivering comprehensive solutions that go beyond single-service upgrades.
Specializing in home performance, Power Home Remodeling provides attic insulation to help reduce energy costs, stabilize indoor temperatures, and enhance overall home comfort. Their approach often includes combining insulation with services like window replacement, roofing, and ventilation improvements to maximize energy savings.
What sets Power Home Remodeling apart is its customer-first philosophy, backed by strong warranties, dedicated project managers, and high satisfaction ratings. The company’s emphasis on employee training and professionalism ensures quality results across all projects.
For homeowners looking to improve their home’s efficiency with a trusted, full-service provider, Power Home Remodeling is a top contender among modern attic insulation companies in 2025.
Read also – 10 Best Equity Release Companies in the US | 2025 Updated List
10. Rockwool & Other Mineral Wool Brands
Rockwool, along with specialty brands like GreenFiber, ranks among the most trusted attic insulation companies for homeowners seeking durable and fire-resistant insulation solutions.
Known for producing stone wool (mineral wool) insulation, Rockwool products are highly valued for their exceptional thermal performance, soundproofing qualities, and resistance to fire and moisture.
These features make Rockwool a preferred choice for attic applications where safety, longevity, and consistent R-value performance are critical. Their insulation is also non-combustible and retains its effectiveness over time, even in extreme conditions.
GreenFiber, on the other hand, specializes in cellulose insulation made from recycled materials, offering eco-friendly options for blown-in attic applications.
Both brands are known for their reliability and are widely used by contractors and insulation specialists across North America.
Whether upgrading an older attic or building a new energy-efficient home, Rockwool and GreenFiber offer premium materials that stand out among the top attic insulation companies in 2025.
How to choose the best Attic Insulation Company
Choosing the best attic insulation company is crucial to ensuring your home’s energy efficiency, comfort, and long-term savings. Here are key factors to consider when making your decision:
- Experience and Expertise
Look for companies with a proven track record and specialized knowledge in attic insulation. Experienced contractors understand how to assess your home’s needs and recommend the best insulation type and installation method. - Range of Insulation Options
Top companies offer multiple insulation types—such as spray foam, blown-in cellulose, fiberglass batts, and mineral wool—so you can choose the solution that fits your budget, climate, and home structure. - Certifications and Licensing
Ensure the company is licensed, insured, and certified by reputable industry organizations like the Insulation Contractors Association of America (ICAA) or Spray Polyurethane Foam Alliance (SPFA). This guarantees adherence to safety and quality standards. - Customer Reviews and References
Check online reviews and ask for references to gauge customer satisfaction, reliability, and professionalism. - Transparent Pricing and Warranties
The best attic insulation companies provide clear estimates upfront and stand behind their work with solid warranties, offering peace of mind. - Energy Efficiency Focus
Choose companies that prioritize energy-saving techniques and can demonstrate measurable results in reducing utility costs.
Conclusion
Choosing the right attic insulation company is essential for maximizing your home’s energy efficiency and comfort. By selecting experienced professionals who offer quality materials, transparent pricing, and excellent customer service, you ensure a lasting investment that lowers energy costs and enhances your living environment year-round.
FAQs
What types of attic insulation do companies typically offer?
Most attic insulation companies provide options like spray foam, blown-in cellulose, fiberglass batts, and mineral wool to suit different budgets and home needs.
How do I know if my attic needs more insulation?
Signs include high energy bills, uneven indoor temperatures, ice dams on the roof, or insufficient existing insulation (usually less than R-30).
How long does attic insulation installation usually take?
Depending on the attic size and insulation type, installation can take from a few hours to a full day.
Will attic insulation help reduce my energy bills?
Yes. Proper insulation minimizes heat loss and gain, reducing the workload on heating and cooling systems and lowering utility costs.
Do attic insulation companies offer warranties?
Many reputable companies provide warranties on materials and workmanship to ensure long-term performance and customer satisfaction.
References
- Top 5 Attic Insulation Companies in 2024: Best Picks!
- Attic Insulation Installation at The Home Depot
