Fiberglass Cloth Market

On 27 November 2025 the board of Nitto Boseki (Nittobo) resolved to hand part of its glass cloth weaving to Nan Ya Plastics in Taiwan, expecting about 20% of the cloth the Nittobo Group supplies to be woven there by 2027, because demand for the low thermal expansion cloth inside AI chip substrates had outrun its own looms. That board decision describes the fiberglass cloth market in 2025: a mature, tonnage business of wind, marine and construction fabrics carrying a thin electronic layer on top whose price per tonne is up to forty times higher. Douglas Insights values the fiberglass cloth market at USD 9.61 billion in 2025 and expects USD 18.7 billion by 2035, a compound annual growth rate of 6.88%. The build is bottom-up: about 2.88 million tonnes of woven and stitched glass fibre fabric sold in 2025 at an average realised price of USD 3,335 per tonne. Tonnes grow 5.2% a year as wind blades lengthen and circuit boards add layers, and the average price rises 1.6% a year as specialty electronic grades take a larger share of the mix. This study sits within our advanced materials and composites coverage and follows the published Douglas Insights methodology.

Where does glass fibre end and fiberglass cloth begin?

Fiberglass cloth is a fabric woven or stitched from continuous filament glass yarns or rovings and sold on the roll to laminators, moulders and converters. Fiberglass cloth sits one step downstream of the fibre itself: the Glass Fiber Market report counts rovings, yarns and chopped strands at producer price, and this study counts the value added when those yarns are woven, stitched, finished with a sizing chemistry and cut to width. Five product families are covered: standard electronic cloth in E-glass styles such as 7628, 2116 and 1080; specialty low dielectric and low thermal expansion electronic cloth; stitched multiaxial fabrics; woven roving and heavy reinforcement fabrics; and industrial and coated cloth used for filtration, fire protection, insulation jackets and PTFE or silicone coated membranes. Buyers are copper clad laminate makers, wind blade manufacturers, boat and transport moulders, construction product makers and industrial coaters. Prepreg, which is cloth already impregnated with resin, open mesh fabrics used for plaster and render reinforcement, glass wool and finished composite parts sit outside the boundary. Value is measured at the cloth maker’s realised selling price.

Why is specialty fiberglass cloth in short supply?

Specialty fiberglass cloth is scarce because AI accelerators need package substrates and circuit boards that neither warp nor lose signal, and only a handful of plants can make the glass that does both. Low thermal expansion glass, sold by Nittobo as T-glass, keeps a large chip substrate flat through repeated heating; low dielectric glass, sold as NE-glass and the newer NER grade, lets signals at 112 gigabits per second travel with less loss. Nittobo describes NE-glass as the de facto standard for low dielectric glass and says it has begun shipping NER to support 800 gigabit Ethernet equipment, according to its Electronic Materials business page. Industry reporting through 2025 and 2026 put Nittobo’s share of T-glass cloth supply near 90%, which is why the 27 November 2025 agreement mattered: Nittobo will concentrate its own investment on yarn melting and cloth treatment, the steps that decide quality, and let Nan Ya weave. Taiwan Glass, Fulltech Fiber Glass and Grace Fabric Technology are qualifying competing low dielectric and low expansion cloth with Taiwanese and Chinese laminate makers, but qualification at a hyperscale customer takes 12 to 24 months. Douglas Insights therefore models specialty electronic cloth tonnage as supply-limited through 2027, with volume growth near 11% a year and price growth near 4% a year until new furnaces and looms clear qualification.

How is fiberglass cloth priced from standard to low-CTE grades?

Fiberglass cloth is priced by grade and weight, and Douglas Insights puts the 2025 average at USD 3,335 per tonne across all five product families. Woven roving and heavy reinforcement fabric is the cheapest at about USD 2,250 per tonne, because it uses thick rovings on wide, fast looms and competes directly with chopped strand mat. Standard electronic cloth averages USD 2,900 per tonne, which is roughly USD 0.60 per square metre for a 7628 style at about 205 grams per square metre, and it moves with copper clad laminate demand and Chinese loom utilisation. Stitched multiaxial fabric averages USD 3,110 per tonne, where the stitching and the precise placement of plies at 0, 45 and 90 degrees add cost that a blade maker recovers in faster infusion. Industrial and coated cloth averages USD 5,540 per tonne because coating with PTFE, silicone or vermiculite can double the value of the base fabric. Specialty low dielectric and low expansion electronic cloth averages about USD 116,000 per tonne, or about USD 5.40 per square metre in thin styles near 47 grams per square metre. That last figure explains the market’s arithmetic: specialty cloth is 0.3% of tonnes but 9% of value, and each point of share it gains lifts the market’s average price.

What powers fiberglass cloth demand from AI boards to wind blades?

AI server and switch boards are the first driver, and the fastest. An AI server uses three to five times the high-grade electronic cloth of a conventional server, because boards carry 20 to 30 layers and accelerator substrates are larger. Douglas Insights models electronic fiberglass cloth, standard and specialty together, growing from USD 3.17 billion in 2025 at 8.3% a year, with specialty cloth alone compounding at 15.25%. The Nittobo and Nan Ya arrangement of 27 November 2025 sets the pace: supply added through 2027 is absorbed as soon as it is qualified.

Wind energy is the second driver and the largest by tonnes. A blade of 100 metres or more contains roughly 25 to 40 tonnes of glass fabric, most of it stitched multiaxial and unidirectional material, and offshore turbines of 14 to 15 megawatts are moving the average blade upward every year. Douglas Insights models wind fiberglass cloth at USD 2.50 billion in 2025, rising 6.9% a year as China, Europe and India commission new capacity; the Wind Turbine Market report sets out the installation path behind that figure.

Lightweighting in marine and transport is the third driver. A glass fabric laminate weighs roughly half as much as a steel panel of similar stiffness, so bus, rail, truck and boat builders replace metal where crash and fire rules allow. Marine and transportation cloth is worth USD 1.34 billion in 2025 and grows 5.1% a year, led by recreational boats in North America and rail interiors in Europe and China, where each rail car carries 400 to 800 kilograms of composite panels.

Corrosion-proof infrastructure is the fourth driver. Glass fabric reinforced pipes, tanks, cooling tower parts and bridge decks outlast steel in water, chemical and coastal service, and a 1 kilometre glass reinforced pipeline uses 20 to 60 tonnes of woven roving and multiaxial fabric depending on diameter. Construction and infrastructure cloth is worth USD 1.44 billion in 2025 and grows 5.3% a year, with desalination, wastewater and chemical plant projects in the Middle East and Asia carrying the fastest growth. All four drivers feed the thermoset laminates covered in the Thermoset Composites Market report, which is where most fiberglass cloth ends up.

What holds back fiberglass cloth outside the AI shortage?

Qualification lag is the first restraint on fiberglass cloth growth. A new low dielectric cloth has to pass laminate, board and end-customer testing before it ships in volume, which takes 12 to 24 months, so new capacity announced in 2025 contributes little before 2027 and a customer that fails an audit can strand a loom line for a year. Douglas Insights holds specialty cloth volume growth near 11% a year through 2027 for this reason, even though demand would support more.

Chinese overcapacity is the second restraint. China weaves most of the world’s standard electronic cloth and industrial fabric, and when Chinese laminate demand softens, as it did in 2023, standard cloth prices fall by 20% to 30% within two quarters. The downside scenario carries a price leg near zero for this reason, and trade measures in Europe, Türkiye and India keep that pressure from being uniform.

Energy cost is the third restraint. Melting glass at about 1,500 degrees Celsius is energy intensive, and yarn accounts for 55% to 70% of the cost of standard cloth, so a rise of EUR 20 per megawatt hour in European power prices adds roughly EUR 60 to EUR 90 per tonne of cloth. European weavers that buy yarn from integrated Asian producers are squeezed between that cost and imported fabric. Wind order timing is a fourth, cyclical drag: a year of delayed auctions in Europe or the United States removes 100,000 tonnes or more of multiaxial demand, which the downside scenario applies.

Which fiberglass cloth weave, from multiaxial to low-CTE, carries the value?

Stitched multiaxial fabric carries the most value in the fiberglass cloth market, at 34% of 2025 sales, and specialty electronic cloth grows fastest. Douglas Insights values the five product families as follows.

Stitched multiaxial fabrics are worth USD 3.27 billion because wind blades, boat hulls and transport panels all use them, and stitching lets a moulder lay several oriented plies in one pass.

Standard electronic cloth is worth USD 2.31 billion because every rigid printed circuit board, from a phone to a car controller, is built on it.

Woven roving and heavy reinforcement fabric is worth USD 1.73 billion, sold to pipe, tank and boat builders who want bulk at the lowest cost per kilogram, which is also why it grows slowest.

Industrial and coated cloth is worth USD 1.44 billion, and its value comes from the coating: filter bags for cement kilns and power plants, welding and fire blankets, conveyor belts for food ovens and architectural membranes.

Specialty low-Dk and low-CTE electronic cloth is worth USD 865 million, and it grows 15.25% a year because every generation of AI accelerator moves more board area onto these grades.

Do laminate makers or blade makers buy more fiberglass cloth?

Electronics buys the most fiberglass cloth by value, at 33% of 2025 sales or USD 3.17 billion, even though it takes less than 30% of tonnes. Copper clad laminate makers such as Kingboard, Shengyi Technology, Elite Material, Panasonic and Doosan convert that cloth into the cores of circuit boards and chip substrates. Wind energy takes 26%, USD 2.50 billion, almost all of it stitched and unidirectional fabric bought by blade makers such as Vestas, Siemens Gamesa, LM Wind Power, Goldwind and Mingyang or their contract moulders. Construction and infrastructure takes 15%, USD 1.44 billion, in pipes, tanks, panels and roofing. Marine and transportation takes 14%, USD 1.34 billion, in hulls, decks, bus and rail panels and truck bodies. Industrial, filtration and protective uses take the remaining 12%, USD 1.15 billion, where buyers pay for heat, chemical and fire resistance rather than stiffness.

Which region weaves and buys the most fiberglass cloth?

Asia Pacific buys 64% of fiberglass cloth by value, USD 6.15 billion in 2025, and grows fastest at 7.30% a year to USD 12.4 billion in 2035. China alone accounts for most of that, because it hosts most of the world’s copper clad laminate plants, the largest wind blade industry and integrated glass fibre producers that weave their own yarn; Taiwan and Japan add the specialty electronic layer, and India is building both laminate and blade capacity. Europe holds 15%, USD 1.44 billion, growing 5.6% a year: multiaxial fabric for wind and marine is its core, woven by companies such as Saertex, Chomarat and Metyx, and anti-dumping duties on Chinese and Egyptian fabric shape its prices. North America holds 14%, USD 1.34 billion, growing 6.4% a year, pulled by recreational boats, corrosion-resistant infrastructure and the reshoring of server board assembly. The Middle East and Africa hold 4%, USD 384 million, and are the wildcard at 6.9% a year: Egypt’s Suez Canal Economic Zone hosts large Chinese-owned glass fibre plants whose fabric exports to Europe carry duties, while Gulf desalination and chemical projects buy glass reinforced pipe. Latin America holds 3%, USD 288 million, growing 6.1% a year with Brazilian wind blade plants and boat builders.

Who supplies fiberglass cloth, and what share of low-CTE cloth does Nittobo control?

Fiberglass cloth supply is fragmented overall, with the five largest makers holding about 27% of 2025 value on Douglas Insights estimates, but concentrated at the specialty end, where Nittobo holds roughly 90% of low expansion cloth. Nittobo leads specialty electronic cloth through integrated melting of T-glass, NE-glass and NER yarn in Japan and Taiwan. Nan Ya Plastics, part of the Formosa Plastics Group, runs one of the largest electronic cloth weaving operations in the world and from 2027 weaves about a fifth of Nittobo’s cloth. Taiwan Glass, Fulltech Fiber Glass and Grace Fabric Technology lead Taiwanese and Chinese standard electronic cloth and are qualifying low dielectric grades; Kingboard weaves cloth for its own laminates. In reinforcement fabric, China Jushi and Taishan Fiberglass weave from their own rovings at very large scale, Saertex and Chomarat lead European multiaxial fabric, Metyx serves wind and marine from Türkiye, and Vectorply is a leading American multiaxial weaver. Saint-Gobain ADFORS and a long tail of coaters lead industrial and coated cloth. Scale wins in reinforcement fabric, while in electronic cloth the advantage rests on glass chemistry and on having passed a customer’s qualification before a competitor does.

How far could fiberglass cloth reach by 2035 if AI server spending stalls or surges?

The base case carries 5.2% growth in tonnes and 1.6% growth in price for a 6.88% revenue CAGR and USD 18.7 billion in 2035. In the slower scenario, AI data centre spending pauses after 2027, wind auctions slip and Chinese overcapacity returns, so the legs fall to 3.2% and 0.2% and the fiberglass cloth market reaches about USD 13.4 billion. In the faster scenario, new low expansion and low dielectric capacity qualifies on time, AI board layer counts keep rising and offshore wind installations accelerate, lifting the legs to 7.0% and 2.8% and carrying the market to about USD 24.9 billion. Each 1-point change in tonnage growth moves the 2035 figure by roughly USD 1.85 billion. Published estimates for the category cluster between 5% and 9% a year; the Douglas figure sits inside that band, higher than volume-only studies because it prices the specialty electronic mix explicitly.

How do EU anti-dumping duties and IPC standards shape the fiberglass cloth trade?

Trade defence is the rule that matters most for fiberglass cloth in Europe. Anti-dumping duties on woven and stitched glass fibre fabrics from China and Egypt have applied since Commission Implementing Regulation (EU) 2020/492 of 1 April 2020, were extended to imports routed through Morocco and Türkiye in 2022, and on 3 April 2025 the European Commission opened an expiry review at the request of the European weavers’ association Tech-Fab Europe, as set out in its notice of initiation. The duties exclude prepreg and open mesh fabrics, which is why this study draws its boundary in the same place. Product standards are the second layer: IPC-4412 specifies electronic cloth styles, IPC-4101 the laminates made from them, IEC 61400-5 the design of wind blades and DNV rules the laminates used in ships and offshore structures. Chemical rules are the third: sizing and coating chemistries fall under REACH in Europe, and PFAS restrictions under discussion in the European Union would affect PTFE-coated industrial cloth.

Douglas Exclusive: the fiberglass cloth weave-capacity and qualification tracker

The fiberglass cloth weave-capacity and qualification tracker lists, by producer and plant, installed looms and stitching lines, yarn source, specialty glass furnaces, announced additions with start dates, and the status of each low dielectric and low expansion grade in laminate and end-customer qualification. The tracker converts that into qualified tonnes available by quarter against modelled demand from AI boards and wind blades, so a laminate maker, blade manufacturer or investor can see when the shortage in each grade is likely to ease and which supplier will be first to relieve it. Douglas Insights updates it as furnaces start, looms ship and qualifications pass.

Methodology and receipts: how do 2.88 million tonnes add up to the fiberglass cloth total?

Douglas Insights built the fiberglass cloth model bottom-up from tonnes and prices across 5 product families, 5 end uses and 5 regions. Electronic cloth demand was derived from copper clad laminate output and layer counts; wind demand from gigawatts installed times fabric tonnes per megawatt; marine, transport and construction demand from composite moulding output; and industrial demand from coater and filter-bag production. Volumes were reconciled with glass fibre production, trade flows under HS heading 7019 in UN Comtrade data and producer disclosures, and prices were set by grade from producer and customs unit values. The receipts are 2.88 million tonnes times USD 3,335 per tonne for 2025, 5.2% volume growth and 1.6% price growth to 2035, and a specialty share rising from 9% to about 19% of value.

Sources

1. EUR-Lex, Publications Office of the European Union Notice of initiation of an expiry review of the anti-dumping measures on certain woven and/or stitched glass fibre fabrics from China and Egypt (C/2025/2022) (2025)
2. Nitto Boseki Co., Ltd. Electronic Materials Business: T-glass, NE-glass and glass cloth for electronic materials (2026)
3. Nitto Boseki Co., Ltd. Medium-Term Management Plan FY2024-FY2027 (2024)
4. United Nations Statistics Division UN Comtrade trade flows, HS 7019 glass fibres and articles thereof (2025)