Top Insulation Brands: A Cozy Lineup for Energy Efficiency

When it comes to home improvement and energy efficiency, choosing the right insulation brand is crucial. Not only does effective insulation help in maintaining a comfortable temperature, but it can also significantly reduce energy bills. Various brands offer a range of materials to cater to different needs, from eco-friendly options to high-performance solutions. Curious to know which brands stand out in the market today? Read on below to discover our carefully curated list of the best insulation brands available.

Illustration of insulation

Best brands of insulation in 2025

Owens Corning

Owens Corning is a leading global producer of insulation, boasting a market-leading position with its PINK FIBERGLAS® insulation containing 35% recycled content and PINK FOAMULAR® insulation with 15% recycled content. The company is North America's largest producer of residential, commercial, and industrial insulation, with a strong franchise and proprietary manufacturing platform. Founded in 1938, Owens Corning has consistently strengthened its financial performance, recording $9.7 billion in net sales in 2023, with its Insulation segment accounting for approximately 37% of total reportable segment net sales. The company's products are energy-efficient, reliable, and do not absorb moisture, ensuring long-lasting qualities. Owens Corning's commitment to innovation and sustainability has made it a premier choice in the building and construction materials industry. For more detailed insights, visit their official investor overview.

Johns Manville

Johns Manville is a leading manufacturer in the insulation industry, known for its high-quality products that enhance energy efficiency and comfort. The company's Industrial Insulation Group generates an estimated annual revenue of $76.6 million and employs 217 people, with a 4% growth in employee count last year. Johns Manville offers a wide range of insulation products, including Thermo-12 Gold calcium silicate, Microporous Blanket Insulation, and MinWool-1200 mineral wool, which are essential for various industrial and residential applications. Their insulation solutions can help homeowners save up to 20% on heating and cooling costs. With a focus on temperature control and energy savings, Johns Manville's products are designed to keep homes warm in winter and cool in summer. For more details on their insulation range, visit their Just Right Home page.

Knauf Insulation

Knauf Insulation is a leading global manufacturer of insulation products, renowned for its high-quality fiberglass and mineral wool insulation. With a strong financial performance, the company boasts a turnover exceeding EUR 2.5 billion and employs nearly 6,000 people across more than 40 countries and 29 manufacturing sites in 15 countries. Knauf Insulation is committed to sustainability, as demonstrated by the launch of its pioneering RESULATION recycling facility in Vise, Belgium, and its goal to take back 25% of customer waste from job sites. The company is part of the larger Knauf Group, which has a turnover of EUR 15.4 billion and employs about 41,500 people worldwide. Knauf Insulation's dedication to energy efficiency and sustainability makes it a respected name in the industry. For more information, visit the Knauf Insulation website.

CertainTeed

CertainTeed is a leading manufacturer of high-performance insulation products, known for their superior energy efficiency, comfort, and sustainability. Their Sustainable Insulation™, made from recycled and renewable materials, offers exceptional thermal insulation properties with R values ranging from R-11 to R-49. This insulation is easy to maintain, long-lasting, and meets strict indoor air quality requirements. CertainTeed's products are favored for their ease of installation and are available in various forms, including rolls and batts, which held a 54.5% market share in 2023. Their metal building insulation also meets energy code requirements for IECC, IRC, IBC, and ASHRAE 90.1.

Rockwool

Rockwool is a leading producer of high-performance insulation, known for its stone wool products that offer exceptional thermal, fire-resistant, and acoustic properties. The global rock wool market, in which Rockwool is a significant player, was valued at USD 13.2 billion in 2023 and is expected to grow at a CAGR of 3.20% from 2023 to 2030. Rockwool's products are made from basalt rock and recycled slag, with some products containing up to 40% pre-consumer recycled content. The company's insulation solutions are widely used in residential and commercial buildings, contributing to energy efficiency and reducing greenhouse gas emissions, as seen in projects like the Ken Soble Tower, which achieved a 94% reduction in emissions. Rockwool's market presence is strong, particularly in North America, where it held more than 38% of the global revenue in 2023. You can find more information about their offerings on the Rockwool North America website.

Dow

Dow Chemical is a leading producer in the foam insulation market, holding a significant 10-12% market share and continuously contributing to industry advancements. The company's Dow Thermax Sheathing, a polyisocyanurate insulation panel, is highly regarded for its high thermal efficiency, water resistance, and environmentally friendly manufacturing process with zero ozone depletion potential. This product is versatile, suitable for use in walls, roofs, and foundations, and offers an R-value of 6.0 per inch of thickness. Dow's commitment to high-performance insulation solutions makes it a preferred choice in both commercial and residential construction projects. With its comprehensive range of foam insulation solutions, Dow remains a major player in the global insulation industry.

Kingspan

Kingspan Group plc is a global leader in high-performance insulation and building envelope solutions, with a significant presence in the market. In 2022, the company reported a 28% increase in revenue to EUR8.3 billion, driven by a 46% growth in QuadCore^TM insulated panel sales, which now represent 17% of their insulated panel volume. Their insulation sales grew by 40% over the prior year, with advanced insulation cored products making up 85% of insulated panels sales volumes. The company has also made notable strides in technical insulation, with Logstor^® sales volumes increasing by 18% in the second half of 2022. Kingspan's global reach includes 212 production sites worldwide, with a diverse geographic distribution of sales across Western and Southern Europe, Central and Northern Europe, the Americas, and other regions.

Isover

Isover, a brand under Saint-Gobain, is a worldwide leader in insulation solutions, boasting 62 production sites in 27 countries and over 80 years of experience. Isover offers a multi-material range, including glass wool and stone wool, which are renowned for their thermal, acoustic, and fire-resistant properties. Their products are designed to enhance energy efficiency, reduce carbon footprint, and improve indoor comfort. With a strong commitment to sustainability, Isover has launched initiatives such as a closed-loop recycling service for glass wool waste. The brand supports customers globally, from specification to construction, ensuring high-performance and sustainable insulation solutions. For more comprehensive information, visit their official website.

Roxul

Roxul, a brand under the ROCKWOOL Group, is a leading producer of high-quality insulation, particularly known for its mineral wool products. In 2022, ROCKWOOL reported a 27% increase in net sales to 3907 MEUR, driven by strong demand for stone wool insulation. Roxul's products, such as ROXUL Safe®, offer enhanced fire protection, are non-combustible, and provide excellent thermal and acoustic insulation. The brand is also committed to sustainability, with products that can earn LEED credits and meet stringent environmental standards. Despite market challenges, ROCKWOOL has maintained a strong market presence and continues to invest in new capacity to support long-term growth.

Celotex

Celotex is a renowned brand in the insulation industry, known for its high-performance polyisocyanurate (PIR) insulation boards that offer exceptional thermal efficiency with a thermal conductivity of 0.022 W/mK. These boards are versatile, suitable for roof, wall, and floor applications, and are available in a range of thicknesses from 20mm to 200mm. Celotex insulation boards are BBA certified and feature a low emissivity foil facing, enhancing their energy efficiency. The brand's products are lightweight and rigid, making them easy to install. With their superior thermal performance, Celotex insulation boards are a preferred choice for both residential and commercial construction projects.