Best Glass Wool Manufacturers for Insulation in 2025

What is glass wool?

Top 10 Glass Wool Manufacturers for High-Quality Insulation

FUNAS (China)

• Founded: 2011
• Main Products: Rubber foam insulation, rock wool products, glass wool products
• Advantages: FUNAS is a manufacturer of glass wool insulation with state-of-the-art Duken ACMF micro-foaming technology. The products they deal with in glass wool have excellent thermal efficiency and uniform pore structure, together with high moisture resistance. FUNAS’s products are safe and have high performance as they have a B1 (C) fire retardant rating and an oxygen index greater than 35. They also stress sustainability by utilizing non-hazardous materials and reducing waste, thus being ideal for industries such as construction, HVAC, and refrigeration.

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Owens Corning (USA)

• Country: United States
• Main Products: Insulation glass wool, fireproofing products, acoustic insulation
• Advantages: Glass wool insulation is well known globally, and Owens Corning is a company that has made a name for itself in this industry and its products’ energy efficiency and fire resistance. They supply and install their products for use in homes, commercial buildings, and industrial uses. Sustainability is also a key factor that Owens Corning has embraced in its manufacturing processes, thus making it a suitable option for any client who cares for the environment.

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Saint-Gobain (France)

• Country: France
• Main Products: Glass wool insulation, fire-resistant materials, thermal insulation
• Advantages: Saint-Gobain has a reputation for its glass wool insulation products that boast of the best thermal and acoustic performance. They also emphasize sustainability, as their manufacturing procedures have a positive impact on the environment. Saint-Gobain is a leading company in the insulation business with products that are of global safety and energy requirements.

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Rockwool International (Denmark)

• Country: Denmark
• Main Products: Stone wool, glass wool insulation, soundproofing materials
• Advantages: Rockwool has a competitive advantage of both glass wool and stone wool products providing a variety of insulation. Its glass wool products are fire-rated, energy-saving, and long-lasting for use in construction, HVAC, and industries. Rockwool has adopted a policy of decreasing energy usage and increasing safety requirements.

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Knauf Insulation (Germany)

• Country: Germany
• Main Products: Glass wool insulation, soundproofing products, thermal insulation
• Advantages: Knauf Insulation produces a range of glass wool products that are light, strong, and efficient at insulating against heat and cold. They offer good heat resistance and soundproofing compared to the traditional products. Sustainability is also a strength of Knauf Insulation in that they use renewable and energy-efficient materials and have low carbon emissions, hence making it the best company to deal with when it comes to insulation.

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Johns Manville (USA)

• Country: United States
• Main Products: Glass wool insulation, fiberglass insulation, soundproofing materials
• Advantages: Johns Manville provides superior glass wool insulation products that are best suited to offer the best thermal and acoustic properties. These aspects of concern with innovation and energy convince their products suitable for residential, commercial, and industrial customers. As a responsible company, Johns Manville offers sustainable insulation products for different uses.

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Kingspan (Ireland)

• Country: Ireland
• Main Products: Insulation products, glass wool insulation, thermal panels
• Advantages: Kingspan produces a range of insulation products, such as glass wool, that provide superior thermal efficiency and cost savings. They are particularly suitable for cutting down on the amount of carbon emissions of buildings. Kingspan has a strong focus on sustainability, delivering products that assist clients to reach energy-efficient and eco-friendly solutions.

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Duna-Corradi (Italy)

• Country: Italy
• Main Products: Glass wool insulation, thermal insulation, soundproofing materials
• Advantages: Duna-Corradi is a reputed producer of glass wool insulation and provides solutions in thermal and acoustic insulation. Their products are energy-friendly and provide quality noise control, hence being ideal for home and business use. Duna-Corradi is also famous for its concern with sustainability and delivering high performance in various sectors.

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Guardian Glass (USA)

• Country: United States
• Main Products: Glass insulation, architectural glass, laminated glass
• Advantages: Guardian Glass also manufactures sophisticated glass insulation products, such as glass wool products, for architectural/building purposes. Their glass wool solutions are focused on providing energy efficiency, better acoustic performance, and safety and durability. Guardian is the company that pays much attention to the environmental aspect in the production of the glass.

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Eagle Insulation (India)

• Country: India
• Main Products: Glass wool insulation, roofing insulation, acoustic insulation
• Advantages: Eagle Insulation is one of the leading manufacturers of glass wool insulation in the Indian market. Having excellent thermal resistance and soundproofing qualities, Eagle Insulation provides affordable solutions to the residents, businesses, and industrial facilities. It is in this respect that their products are developed to meet the increasing demand for quality insulation in new markets.

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How to Choose Glass Wool Manufacturers for Different Uses?

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