Glass Fiber Market Size & Share Analysis - Growth Trends and Forecast (2026 - 2031)

Global Glass Fiber Market Trends and Insights

Post-Pandemic Construction Boom in Asia Bolsters Demand for Glass-Wool Insulation

India allocated USD 120 billion to infrastructure in fiscal 2025, and nearly half of that spending went into residential projects where glass-wool batts are now required by the 2024 Energy Conservation Building Code^{[1]Ministry of Power, Government of India, “Energy Conservation Building Code 2024,” powermin.gov.in}. Vietnam’s construction sector advanced 9.1% in 2025, with foreign-invested factories specifying clean-room insulation that relies on low-density glass wool. Indonesia earmarked IDR 410 trillion (USD 27 billion) for 2025 infrastructure, using glass-wool products that cut cooling loads by up to 35% in tropical housing. Malaysia and Thailand show parallel trends as data-center and cold-chain investors adopt higher R-value batts to meet ASHRAE 90.1 targets. Collectively, these programs keep Asia the anchor of glass fiber market growth.

EV Lightweighting Accelerates Adoption of Chopped-Strand Composites

Global battery-electric vehicle production hit 14.2 million units in 2025, a 19% jump over 2024 that propelled composite demand^{[2]International Energy Agency, “Global EV Outlook 2026,” iea.org}. Tesla’s Model Y uses chopped-strand mat structures to trim body-in-white mass by 23%, translating into an 18 km range extension per charge. BYD, Volkswagen, and General Motors each validated glass-fiber-reinforced thermoplastics for battery trays, together saving more than USD 300 per vehicle against aluminum alternatives. As automakers push toward cost-parity EVs, volume contracts for chopped strands underpin a steady mid-single-digit rise in the glass fiber market.

Mega-Scale Wind-Turbine Blades Expand Roving Consumption

Offshore turbines rated 15–18 MW entered service in 2025, and each 120-plus-meter blade contains roughly 35 tons of unidirectional roving. Vestas’s V236-15 MW unit, Hollandse Kust West, and GE Vernova’s Haliade-X all specify European-sourced rovings to satisfy domestic-content rules under the EU Net-Zero Industry Act. China’s Goldwind deployed 18 MW machines that drive similar fiber intensities, lifting Asia’s share of global roving contracts. New blade factories in France, India, and the United States are signing multi-year offtake deals, locking in floor volumes for the glass fiber market through the next decade.

EU and North-American Retrofit Energy Codes Mandate Additional Insulation

The revised 2024 EU Energy Performance of Buildings Directive obliges member states to upgrade 3% of public buildings annually to class C, and most projects specify glass-wool cavity fills because of low installed cost and mature supply chains. Germany committed EUR 14 billion in 2025 subsidies that lifted attic-insulation installs by 420,000 homes, while France’s MaPrimeRénov’ financed 700,000 retrofits that favor glass wool for 35–40% heat-loss cuts. North America shows a parallel push: Canada’s Greener Homes Grant covered 180,000 projects in 2025, and the U.S. Weatherization Assistance Program reached 450,000 low-income homes, together absorbing more than 500 kilotons of glass wool. Tightening rules fast-track repeat orders, adding resilience to the glass fiber market.

Carbon-Fiber Price Erosion Narrows Glass-Fiber’s Cost Advantage

Toray, Mitsubishi Chemical, and SGL Carbon added a combined 9,500 tons of carbon-fiber nameplate capacity during 2025, pushing average prices down to USD 16.30 per kilogram. Automotive compounds now see a cost gap of only 2× versus glass-fiber polypropylene, compared with 2.4× in 2023. Sporting goods OEMs are piloting lower-cost shafts that could siphon mid-tier volumes away from E-Glass. Absent countermeasures, this trend trims the glass fiber market growth trajectory.

Rock-Wool Producers Target Less Than 100 kg/m³ HVAC Niche

Rockwool International launched a 90 kg/m³ board that hits R-4.2 per inch and carries Euroclass A1 fire certification, immediately winning share in German high-rise retrofits. Paroc and Knauf added similar offerings in 2025, and Owens Corning’s Thermafiber line gained a 12% share in North American data centers, sectors where combustibility ratings trump initial cost. These moves cap near-term growth for glass-wool batts in commercial HVAC retrofits.

Segment Analysis

By Product Form: Roving Sustains Leadership on Wind and EV Momentum

Roving contributed 33.45% to 2025 volume and is on track for 4.41% CAGR through 2031, outpacing the broader glass fiber market because each 15 MW offshore turbine consumes 35 tons of unidirectional material. Mats follow, anchored in automotive underbody panels and marine laminates produced in low-cost Chinese and Turkish yards. Glass wool receives a tailwind from retrofit mandates across Europe and North America. Strands, yarns, and the “others” cluster supply printed-circuit boards, filtration textiles, and specialty adhesives, but direct-roving pultrusion is cannibalizing intermediate formats.

Roving’s installed base benefits from process improvements that cut cycle time in automotive compression molding to four minutes, half that of chopped-strand mats. Glass-wool producers are lowering binder content to 3%, improving R-value, and meeting VOC limits in California. Milled fiber remains a rheology modifier in sealants, whereas woven fabrics secure aerospace tooling demand. All told, diversified applications shield the glass fiber industry against single-segment swings.

Note: Segment shares of all individual segments available upon report purchase

By Fiber Type: E-Glass Dominates While E-CR Gains in Hydrogen Pipelines

E-Glass held 48.91% of volume in 2025 and is expanding at a CAGR of 4.32% through 2031, reinforced by a tensile strength of 3,400 MPa at a cost of USD 2.10 per kg. E-CR Glass, prized for alkali resistance, is scaling at double-digit rates within hydrogen-pipeline linings worth USD 150 million in 2025. S-Glass, commanding USD 23.40 per kg, captures high-performance aerospace niches. C-Glass is declining as E-CR delivers similar chemical durability at a lower total cost.

High-modulus E-Glass variants exceeding 90 GPa now allow blade designers to shave spar-cap thickness by 8–10%, preserving structural safety as rotor diameters crest 240 m. AR-Glass and D-Glass fill concrete reinforcement and low-dielectric roles, respectively. The diversified palette ensures that any substitution threat is segment-specific, leaving the broader glass fiber market intact.

By End-User Industry: Construction Leads, Aerospace Rises Fastest

Construction consumed 33.07% of 2025 tonnage owing to attic and cavity-wall insulation installs subsidized in Germany, France, and Canada. The consumption by the aerospace and defense industry is growing at a higher CAGR of 5.55% through 2031. Automotive ranked second as EV output hit 14.2 million units, each battery-tray switch from steel to polypropylene composites stripping out up to 25 kg of mass. Wind energy uses between 8–10 kg per installed megawatt, a ratio that scales with the offshore boom. Aerospace and defense grew 5.55% annually, driven by U.S. rotorcraft and European UAV programs that specify S-Glass radomes.

Marine, sports, and electronics provide steady mid-single-digit growth. Recreational boating registrations climbed 6% in 2025, lifting hull laminate demand. Carbon-fiber encroachment in premium sporting goods mainly affects the top segment, leaving cost-sensitive mid-tiers anchored to E-Glass. Printed-circuit board volumes ride 5G base-station deployments and hyperscale data-center expansions, both of which keep strand consumption buoyant.

Note: Segment shares of all individual segments available upon report purchase

Geography Analysis

Asia-Pacific dominated the glass fiber market with 49.81% of 2025 volume and is slated for a 4.57% CAGR to 2031. India alone absorbed 1.8 million tons, up 19% year-on-year, as developers met strengthened thermal codes. China produced 5.2 million tons but exported 38%, reflecting persistent overcapacity and aggressive outbound logistics. Vietnam’s 1.2 GW of 2025 wind builds needed 9,600 tons of roving, while Indonesia’s EV-motorcycle boom raised composite consumption in two-wheel battery enclosures.

North America accounted for a significant market share in 2025. The U.S. installed 12 GW of wind capacity under Inflation Reduction Act incentives, translating into 96,000 tons of roving demand. Canada’s Greener Homes Grant installed 180,000 retrofit kits dominated by glass wool, and Mexico produced 3.8 million vehicles using composites in 28% of units.

Europe accounted for significant glass fiber consumption in 2025, with Germany, France, and the U.K. making up 58%. Germany’s 420,000 home retrofits drew heavily on glass-wool batts, whereas France added 2.1 GW of wind that required 16,800 tons of roving. The U.K. saw automotive softness but aerospace upside as Airbus raised A320neo wing set output. South America and the Middle East-Africa together are witnessing the rising demand driven by Brazil’s 2.3 million-unit auto fleet and Saudi Arabia’s hydrogen pipelines that consume 12,000 tons of E-CR glass.