Gramitherm
Gramitherm Europe SA manufactures and distributes semi-rigid bio-based insulation panels made primarily from locally sourced grass fibre, serving construction professionals, homeowners, and institutional buyers across Belgium, France, the Netherlands, and 45+ countries via a certified distributor network and D2C e-commerce.
- Company typePrivate
- Founded2006
- HeadquartersAuvelais, Belgium
- Headcount11–50
- GTM typeB2B and B2C
- OfferingHardware or Manufacturing
What Gramitherm does
Gramitherm Europe SA, headquartered in Auvelais (Sambreville), Belgium, manufactures and distributes semi-rigid bio-based insulation panels under the Gramitherm® brand. The company's core product is a panel composed of 70% locally sourced natural grass fibre, 20% recycled jute fibre (from the Port of Antwerp), and 10% synthetic binder, produced via low-energy thermoforming at up to 160°C in a circular process that recovers biogas for power generation and recycles production offcuts. The Auvelais facility has an annual production capacity of 200,000 m³, with grass sourced within a 300-350 km radius. Gramitherm panels deliver thermal conductivity of 0.040 W/mK, a 9-hour thermal phase shift at 240mm, 99% sound absorption at 1000 Hz, A+ indoor air quality certification (TVOC 17 µg/m³ after 28 days), EuroClass E fire rating, and a documented negative carbon footprint (1 kg of panel stores 1.5 kg CO2-eq).
Gramitherm serves construction and renovation professionals (architects, builders, contractors), individual homeowners and self-builders, and institutional buyers across education, government, social housing, hospitality, and sports infrastructure verticals. The company generates revenue through one-time panel sales distributed via a certified distributor and installer network across Belgium (25+ locations), France, and the Netherlands, with availability in 45+ countries through partner distributors. Direct sales and technical services (logistics, paid training, on-site startup, design office consulting) support enterprise projects, and the 2025-launched GramiShop e-commerce platform serves individual buyers directly. Complementary products include the proprietary Gramitherm® saw (GramiCut) and Ampack-branded airtightness/vapour-control membranes.
Gramitherm operates without disclosed external venture or private equity backing, is founder-led by CEO Christian Roggeman (who acquired the underlying IP in 2013), and holds European Technical Approval (ETA-21/0260), Solar Impulse Efficient Solution labelling (2019, renewed 2022), Trends Impact Award 2022 (Circular Economy), and Walloon Region Bio-Based Product certification (2020, renewed 2024). Headcount is reported at 11-50 employees, and the company has accumulated 3,140.79 tonnes of CO2-equivalent savings for customers since 2020.
Gramitherm firmographics
Firmographics- Name
- Gramitherm
- Legal name
- Gramitherm
- Website
- https://gramitherm.eu
- Company type
- Private
- Founded year
- 2006
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Gramitherm Europe SA manufactures and distributes semi-rigid bio-based insulation panels made primarily from locally sourced grass fibre, serving construction professionals, homeowners, and institutional buyers across Belgium, France, the Netherlands, and 45+ countries via a certified distributor network and D2C e-commerce.
- Ownership category
- akta.pro rank
Gramitherm industry classification
Industry- Product category
- Bio-based Building Insulation Materials
- NAICS
- Nonwoven Fabric Mills (31323)
- akta.pro primary industry
- Thermal & Acoustic Insulation Textiles (Insulation Felts/Soundproofing) (IMAOADAL)
- akta.pro secondary industries
- Roof Insulation & Cover Boards (IMADAFAN), Air Sealing Membranes, Tapes & Gaskets (Air Barriers) (IMADAGAI)
Keywords
Where Gramitherm is headquartered
LocationHeadquarters
- HQ city
- Auvelais
- HQ country
- Belgium
- HQ region
- Europe
Offices1 record
Markets served
Gramitherm business model
Business model- GTM type
- B2B and B2C
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D, Infrastructure
Revenue model
- Grass Fibre Insulation Panel Sales: Gramitherm sells its core product — semi-rigid grass fibre insulation panels — through a network of distributors, installers, and directly via the GramiShop e-commerce platform. Panel sales are one-time hardware purchases for construction and renovation projects, supplemented by complementary products including the Gramitherm® saw and Ampack membranes.
- Professional Services: Gramitherm offers paid technical training sessions (cutting, installation, Ampack membranes, installer certification), on-site startup support, and design office consulting for custom technical advice. These services are provided alongside product sales to support project success.
Go-to-market motion3 records
Distribution channels4 records
Marketing channels6 records
Gramitherm product offering
Product offeringCore offering
Gramitherm manufactures and sells semi-rigid grass fibre insulation boards (Gramitherm®) made from 70% locally sourced grass fibre, 20% recycled jute fibre, and 10% synthetic binder, produced at a dedicated facility in Auvelais, Belgium with 200,000 m³ annual capacity. The panels deliver thermal insulation (λ = 0.040 W/mK), 9-hour thermal phase shift, 99% sound absorption at 1000 Hz, moisture regulation, A+ VOC indoor air quality, and a verified negative carbon footprint for use in walls, partitions, floors, ceilings, attics, roofs and external insulation of residential and commercial buildings. Supporting offerings include a dedicated cutting saw, Ampack membrane accessories, paid technical training, on-site startup support, and design office consulting.
Product overview
Gramitherm offers a portfolio of bio-based insulation solutions centered on its flagship Gramitherm® grass fibre insulation board — a semi-rigid panel made from 70% locally sourced grass fibre, 20% recycled jute fibre from coffee/cocoa sacks, and 10% synthetic binder. The core product is complemented by the GramiCut saw (a dedicated cutting tool for clean installation), the Ampack membrane partnership (airtightness/vapour control solutions), and sample products for customer evaluation. Available in thicknesses from 45mm to 220mm, the insulation serves walls, partitions, floors, ceilings, attics, roofs, and external applications. The company also provides support services including logistics, technical training, on-site startup assistance, and design office consulting.
Differentiator
Problem solved
Functional benefit
Brands
- GramiShop: E-commerce platform for individuals and professionals to purchase Gramitherm® insulation products and accessories.
Products and services
- Gramitherm® Grass Fibre Insulation Board Natural semi-rigid insulation panel made from 70% grass fibre, 20% recycled jute fibre, and 10% synthetic binder. Provides thermal conductivity of 0.040 W/mK, 9-hour thermal phase shift, 99% sound absorption at 1000 Hz, A+ VOC indoor air quality, EuroClass E fire rating, and a verified negative carbon footprint. Suitable for partitions, walls, floors, ceilings, attics, roofs, and external insulation applications in residential and commercial construction.
- Gramitherm® Saw (GramiCut)
Quantifiable outcome
- 1 kg of Gramitherm® stores 1.5 kg of CO₂-eq (negative carbon footprint)
- +10 more outcomes
Companies that use Gramitherm
Customer profileNamed customers13 records
Segments6 records
Ideal customer profiles4 records
Gramitherm technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Gramitherm partnerships and signals
Strategic signalPartnerships
Seven partnerships are on record, tiered core and minor.
- AmpackcoreAmpack is Gramitherm's key technology partner for moisture control systems. Ampack provides high-performance vapour control, airtightness, and rain barrier membranes (including Ampatex Cento and DB90) that complement Gramitherm® panels. Ampack uses Wufi 6.3 Pro software for hygrothermal analysis of wall assemblies, and the two companies jointly develop insulation systems optimised for thermal, hygrometric, and hygrothermal performance. Ampack membranes are sold as partner products alongside Gramitherm® on the Gramitherm website.
- Cluster Eco ConstructionminorGramitherm is an active member of the Cluster Eco Construction association, which promotes responsible practices in the building sector.
- Cap ConstructionminorGramitherm partners with Cap Construction to drive innovation and encourage the use of eco-responsible materials in building projects.
- CD2EminorCD2E provides technical support to Gramitherm for developing even more sustainable solutions in the bio-based construction materials space.
- FRD-CODEM (Centre de Recherche et de Documentation sur l'Énergie et l'Environnement)minorFRD-CODEM is a technical innovation centre that supports the development of bio-based materials. Its scientific and technical expertise enhances the performance of Gramitherm® solutions. CODEM conducted the specific heat capacity testing (report RE0624AC-002) referenced in Gramitherm's technical documentation.
- Solar Impulse FoundationminorThe Solar Impulse Foundation awarded Gramitherm® the 'Efficient Solution' Label in 2019 (renewed in 2022), recognising it as a solution that combines sustainability and efficiency to address global environmental challenges.
- EPFL (École Polytechnique Fédérale de Lausanne)minorEPFL collaborated with agronomist Stefan Grass to develop the original grass-to-insulation technology that became Gramitherm®.
Scale indicators5 records
Recent moves8 records
Expansion highlights6 records
Gramitherm competitors and assessment
Company assessmentDirect peers
- STEICO: Europe's largest wood-fibre insulation producer, offering flexible and rigid wood-fibre batts/boards alongside I-joists and other timber products. Directly comparable product set and target segments to Gramitherm, at greater scale.
- Thermo-Hanf: German manufacturer of hemp-fibre insulation products for walls, ceilings, attics and floors. Competes in the same bio-based insulation category as Gramitherm with comparable value proposition on healthy indoor air quality and sustainability.
- Gutex Holzfaserplattenwerk: Germany-based manufacturer of wood-fibre insulation boards, the closest natural-fibre insulation analog to Gramitherm. Both target the same eco-construction, residential renovation, and roof/wall/attic applications with semi-rigid bio-based panels.
- Isolena Naturfaserbaustoffe: Austrian manufacturer of hemp-fibre flexible insulation batts. Directly comparable bio-based insulation competitor, addressing similar eco-construction and healthy-building specifier networks in DACH and Benelux.
- Black Mountain Insulation (Thermafleece): UK-based natural-fibre insulation specialist using British wool blended with other natural fibres for thermal and acoustic insulation in residential and commercial builds. Comparable bio-based positioning and end-use applications to Gramitherm.
- Pavatex (Soprema Group): Swiss-origin wood-fibre insulation specialist now under Soprema, producing boards for roof, wall and floor applications. Highly comparable product positioning to Gramitherm in bio-based construction segments.
- Hunton (Hunton Fiber AS): Norwegian manufacturer of wood-fibre insulation boards for walls, roofs, and floors. Directly comparable as a natural-fibre insulation specialist with similar certifications and channel model across Northern Europe.
Broad incumbents
- Rockwool: Global mineral wool insulation leader with extensive EU presence in residential and commercial building insulation. Primary established competitor taking conventional-insulation specifications away from bio-based newcomers like Gramitherm.
- Soprema: Large international waterproofing and insulation group; owns Pavatex (wood-fibre insulation) and Ampack (Gramitherm's own membrane partner). Competes across multiple insulation categories including bio-based, with vastly greater scale and distribution.
- Saint-Gobain (Isover): Global mineral wool and glass fibre insulation leader with deep EU distribution and a growing bio-based product line. Competes head-on with Gramitherm on thermal/acoustic insulation specifications across Europe.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat6 records
Key risks6 records
Key highlights7 records
Customer concentration
Gramitherm social profiles
Digital presenceGramitherm compliance and trust
Trust signalCompliance5 records
Gramitherm financial estimates
Financial estimateRevenue estimate
Valuation estimate
Gramitherm leadership team
Management profileNumber of profiles
Gramitherm funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Gramitherm M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Gramitherm
What does Gramitherm do?
Gramitherm manufactures and sells semi-rigid grass fibre insulation boards (Gramitherm®) made from 70% locally sourced grass fibre, 20% recycled jute fibre, and 10% synthetic binder, produced at a dedicated facility in Auvelais, Belgium with 200,000 m³ annual capacity. The panels deliver thermal insulation (λ = 0.040 W/mK), 9-hour thermal phase shift, 99% sound absorption at 1000 Hz, moisture regulation, A+ VOC indoor air quality, and a verified negative carbon footprint for use in walls, partitions, floors, ceilings, attics, roofs and external insulation of residential and commercial buildings. Supporting offerings include a dedicated cutting saw, Ampack membrane accessories, paid technical training, on-site startup support, and design office consulting.
Is Gramitherm a public or private company?
Gramitherm is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Gramitherm founded?
Gramitherm was founded in 2006. It employs 11 to 50 people.
Where is Gramitherm based?
Gramitherm is headquartered in Auvelais, Belgium, in the Europe region.
How does Gramitherm make money?
Two revenue lines are on record. Grass Fibre Insulation Panel Sales are the primary driver. The others are professional Services.
Who are Gramitherm's main competitors?
Direct peers on record are STEICO, Thermo-Hanf, Gutex Holzfaserplattenwerk, Isolena Naturfaserbaustoffe, Black Mountain Insulation (Thermafleece), Pavatex (Soprema Group) and Hunton (Hunton Fiber AS). Broad incumbents are Rockwool, Soprema and Saint-Gobain (Isover).
Does Gramitherm have an API?
No public API is recorded for Gramitherm.
What industry is Gramitherm in?
Gramitherm's product category is Bio-based Building Insulation Materials. Its primary akta.pro industry code is IMAOADAL, Thermal & Acoustic Insulation Textiles (Insulation Felts/Soundproofing), with a secondary code of IMADAFAN, Roof Insulation & Cover Boards. Its NAICS code is 31323.