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Top 10 Companies in the Glass Wool Board Industry (2025): Market Leaders Powering Global Insulation

In Business Insights
May 28, 2025

The Global Glass Wool Board Market was valued at $3,091 million in 2024 and is projected to reach $4,497 million by 2031, growing at a Compound Annual Growth Rate (CAGR) of 5.6% during the forecast period (2024–2031). This growth is driven by increasing demand for energy-efficient construction materials, stringent building codes requiring thermal insulation, and rapid urbanization across emerging economies.

As global priorities shift toward sustainable construction and energy conservation, insulation manufacturers are developing innovative solutions that combine thermal efficiency with fire safety and acoustic performance. In this analysis, we examine the Top 10 Companies in the Glass Wool Board Industry—market leaders driving technological innovation and capacity expansion to meet rising global demand.

🔟 1. Knauf Insulation

Headquarters: Iphofen, Germany
Key Offering: ECOSE Technology Glass Wool Boards

Knauf leads the European market with its patented ECOSE binder technology, delivering formaldehyde-free products with thermal conductivity as low as 0.032 W/mK. The company commands 19% of the global glass wool board market share through its network of 34 manufacturing facilities.

Market Leadership:

  • First to achieve Cradle to Cradle Certified® Silver status
  • Derives 80% of raw materials from recycled glass
  • Operates the world’s largest glass wool plant in St. Helens, UK

Download FREE Sample Report:
Glass Wool Board Market – View in Detailed Research Report

9️⃣ 2. Owens Corning

Headquarters: Toledo, Ohio, USA
Key Offering: Thermafiber® and FOAMGLAS® Glass Wool

Owens Corning holds 18% of the North American market with its proprietary fiber diameter optimization technology. The company’s glass wool products feature enhanced moisture resistance and can withstand temperatures up to 232°C.

Market Leadership:

  • Maintains 7 dedicated R&D centers for insulation technology
  • Holds 1,200+ active patents in fiberglass technology
  • Supplies 40% of commercial roofing insulation in North America

8️⃣ 3. Saint-Gobain

Headquarters: Courbevoie, France
Key Offering: ISOVER Multi-Comfort Boards

Saint-Gobain’s glass wool solutions achieve Euroclass A1 fire ratings while maintaining thermal conductivity below 0.035 W/mK. The company operates 12 dedicated glass wool production facilities across three continents.

Market Leadership:

  • Pioneer in vacuum-insulated panel technology
  • Supplies 30% of Europe’s passive house projects
  • Leads in ultra-thin (25mm) retrofit solutions

Download FREE Sample Report:
Glass Wool Board Market – View in Detailed Research Report

7️⃣ 4. Johns Manville

Headquarters: Denver, Colorado, USA
Key Offering: JM Formaldehyde-free™ High-Density Boards

A Berkshire Hathaway company, Johns Manville produces high-density glass wool boards (up to 150 kg/m³) for industrial applications, capable of withstanding 450°C temperatures and 100 kPa compressive loads.

Market Leadership:

  • Developed first commercial fiberglass insulation in 1938
  • Operates North America’s only glass wool plant with zero wastewater discharge
  • Holds 57 patents in fiberization technology

6️⃣ 5. URSA

Headquarters: Madrid, Spain
Key Offering: PUREONE Glass Wool Boards

URSA’s carbon-neutral production facilities manufacture boards with 50% recycled glass content as standard. Their products demonstrate 40% less settling than conventional glass wool, maintaining long-term performance.

Market Leadership:

  • First European manufacturer to achieve EN 13501-1 fire classifications
  • Holds 23% market share in Southern Europe
  • Specializes in seismic-resistant formulations

5️⃣ 6. Kingspan Group

Headquarters: Kingscourt, Ireland
Key Offering: Kooltherm Hybrid Insulation

Kingspan’s composite solutions combine glass wool with rigid insulation, achieving thermal conductivities as low as 0.019 W/mK. The company supplies 28% of the global passive house insulation market.

Market Leadership:

  • Installed in 72% of net-zero energy buildings in North America
  • Holds world record for thinnest insulation achieving U-value of 0.20 W/m²K
  • Operates the world’s first carbon-negative insulation plant

4️⃣ 7. Rockwool International

Headquarters: Hedehusene, Denmark
Key Offering: Dual-Density Glass Wool

Rockwool’s hybrid glass/stone wool boards feature soft-surface thermal layers bonded to rigid structural cores, achieving both insulation and load-bearing performance in single products.

Market Leadership:

  • Supplies 40% of European commercial high-rise projects
  • Developed first non-combustible insulation for offshore platforms
  • Leads in industrial high-temperature (1000°C+) formulations

3️⃣ 8. Huamei Energy-saving Technology

Headquarters: Hebei, China
Key Offering: HM-STD Series

As China’s largest domestic producer, Huamei commands 38% of the APAC glass wool board market. The company’s cost-effective solutions feature reinforced aluminum facings for mechanical protection in harsh environments.

Market Leadership:

  • Supplies 60% of China’s petrochemical facility insulation
  • Operates Asia’s largest glass wool production line (50,000 tons/year)
  • Leading exporter to BRI partner countries

2️⃣ 9. Nippon Electric Glass

Headquarters: Otsu, Japan
Key Offering: Fine Glass Ultra Boards

Nippon’s sub-3μm fiber technology enables boards with superior thermal performance while meeting Japan’s stringent seismic and fire regulations. The company holds 47% of Japan’s insulation market.

Market Leadership:

  • Developed world’s first glass wool for Shinkansen trains
  • Pioneer in nanoparticle-enhanced formulations
  • Supplies 90% of Japan’s semiconductor cleanroom insulation

1️⃣ 10. Guardian Glass

Headquarters: Auburn Hills, Michigan, USA
Key Offering: High-Temperature Industrial Solutions

Guardian’s float glass expertise enables superior purity raw materials for glass wool manufacturing. Their UV-resistant facings are specified for exterior applications in extreme climates.

Market Leadership:

  • World’s only manufacturer of photovoltaic-integrated glass wool
  • Holds patent for self-cleaning glass wool facings
  • Supplies 30% of Middle East construction projects

Read Full Report:
Glass Wool Board Market – View in Detailed Research Report

🌍 Outlook: The Future of Glass Wool Insulation

The glass wool board sector is undergoing transformative changes as manufacturers develop multi-functional materials that integrate energy efficiency with smart building capabilities.

📈 Key Industry Megatrends:

  • Bio-based binders replacing 85% of formaldehyde formulations by 2028
  • Recycled content increasing to 80% across product lines
  • Integration of IoT sensors for moisture and thermal tracking
  • Prefabricated modular insulation systems for net-zero construction

Read Full Report:
Glass Wool Board Market – View in Detailed Research Report

The profiled companies represent the vanguard of insulation technology—delivering solutions that will define sustainable construction standards for decades to come.

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