Baur Folien

What Baur Folien does

Baur Folien GmbH is a German family-owned manufacturer, founded in 1991 and headquartered in Wolfertschwenden, Allgäu, specializing in customized membrane and gas storage systems for the biogas industry. The company engineers, produces, and installs double membrane gas holders, ground/double membrane storage tanks, foil gas storage units, and EPDM gas membranes with storage capacities from 10 m³ to 20,000 m³. Its technology is anchored by three granted patents — a heat protection membrane (claimed up to 30% heat loss reduction), a belt tensioning system for wind load and overpressure stability, and the L15 leakage detection system with DIBt general building authority approval (no. Z-59.26-489) — the latter described as the only approved system for slurry cellars and drive-over tanks. Beyond biogas, Baur sells adjacent agricultural products (emission protection covers, silage films, pasture tents, roller shutters) and gardening/landscaping films (pond liners, geomembranes).

The business operates a B2B, project-based, custom-quoted model targeting biogas plant operators, plant engineers, and general contractors worldwide, complemented by direct in-house installation, commissioning, and acceptance testing. Revenue streams combine one-time equipment sales, professional installation services, and a recently launched recurring Service and Maintenance Contract (April 2025) for annual inspection, leak testing, and TRAS 120 compliance documentation. The company operates globally with production facilities in Germany and (since 2024) India, and is led by the founding Baur family with second-generation management (Simon Baur and Christian Schwank) added in 2020 alongside co-founders Josef and Peter Baur.

Customer acquisition relies on enterprise field sales supported by an active international trade fair calendar (World Biogas Expo Birmingham, ECOMONDO Rimini, ENVIRONTEC Budapest, etc.) and a German/English bilingual website. The firm has completed well over 10,000 projects globally, with named reference customers including Bioenergie Hartmann, Günter Krieger GmbH, Hecht Weihenzell, and the Insingen Biogas Plant, spanning projects from a 75 kW educational installation to a 20,000 m³ industrial storage facility with satellite CHP units. Pricing is non-public and quote-based per project specification, and no revenue or headcount figures are publicly disclosed.

Name

Baur Folien

Legal name

Baur Folien GmbH

Website

https://baur-folien.de

Company type

Private

Founded year

1991

Operating status

Operating

Headcount range

51–100 employees

Short description

Baur Folien GmbH is a German family-owned manufacturer of customized membrane and gas storage systems for biogas plant operators and plant engineers worldwide. It produces double membrane gas holders, leak detection systems, and related foil products, supplemented by in-house installation and recurring maintenance services.

Ownership category

akta.pro rank

Product category

Biogas Gas Storage Systems

NAICS

Oil and Gas Field Machinery and Equipment Manufacturing (333132)

SIC

Gaskets, Packg & Sealg Devices & Rubber & Plastics Hose (3050)

akta.pro primary industry

Biogas/RNG Plant Development, EPC & Project Delivery (EUAAAEAH)

Keywords

• Biogas storage systems
• Double membrane gas holders
• Leakage detection systems
• Agricultural foil products
• EPDM gas membranes

Headquarters

HQ city

Wolfertschwenden

HQ country

Germany

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Gas Storage Systems Sales: Sale of custom-manufactured gas storage systems including double membrane gas holders, floor/double membrane storage, foil gas storage, and EPDM gas membranes. Products are tailored to customer specifications and tank requirements
2. Installation and Assembly Services: Worldwide on-site installation and assembly of gas storage systems by qualified mounting teams. Service includes commissioning and acceptance testing
3. Maintenance and Service Contracts: Annual professional inspection and servicing of tank covers and components. Includes visual inspection, functional testing, leak testing with gas camera, and TRAS 120 compliance documentation
4. Replacement Parts and Accessories: Supply of spare parts, accessories, and components for gas storage systems including weather protection membranes, gas storage membranes, substructures, fastening systems, and measurement technology
5. Agricultural Products: Sale of agricultural products including emission protection covers, multi-year silage films, pasture tents, roller shutters, sliding curtains, and fixed cover/side ventilation systems
6. Gardening and Landscaping Products: Pond liners, water reservoirs, films, and nonwovens for gardening and landscaping applications

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

Baur Folien develops, plans, manufactures, and mounts custom membrane and gas storage systems primarily for the biogas industry, including double membrane gas storage tanks, ground/double membrane storage units, foil gas storage, and EPDM gas membranes. The company also supplies agricultural foil products (emission protection covers, silage films, pasture tents, roller shutters) and geomembranes for water reservoirs and landscaping, supported by an in-house installation service and annual maintenance contracts including DIBt-approved leakage detection.

Product overview

Baur Folien is a manufacturer of customized membrane and gas storage systems for the biogas, environmental, and agricultural sectors. The product portfolio consists of four main product lines: (1) Gas Storage Systems including Double Membrane Gas Storage, Ground/Double Membrane Storage with floor sealing, Foil Gas Storage, and EPDM Gas Membranes, plus comprehensive accessories; (2) Leckageerkennung (Leakage Detection) featuring the DIBt-approved L15 leakage detection system for JGS and biogas plants; (3) Agriculture products including Emission Protection Covers, Multi-Year Silage Films, Pasture Tents, Roller Shutters & Sliding Curtains, and Fixed Cover & Side Ventilation; (4) Gardening & Landscaping products covering Water Reservoirs & Ponds and Films & Nonwovens. The company also offers a Service and Maintenance Contract as an add-on service for ongoing maintenance of their products and compatible third-party systems.

Differentiator

Problem solved

Functional benefit

Products and services

• Double Membrane Gas Storage Flexible gas storage system with two independent membranes — a weather protection membrane outside and a gas storage membrane inside, stabilized by supporting air pressure — for safe, efficient biogas storage on tanks of various sizes and shapes. Designed for biogas plant operators and plant engineers.
• Ground / Double Membrane Storage Modern alternative to conventional slurry storage tanks serving as the foundation for double membrane gas storage, including floor sealing, mounted on floor slab, ring foundation, or concrete ceiling with flexible assembly. Targeted at biogas plant operators and engineering contractors.
• Foil Gas Storage Unpressurized external gas storage in cushion, cylinder, or cube shape, manufactured to measure with various connection types and sizes. For biogas plants and other gas storage applications.
• EPDM Gas Membrane Flexible, weather-resistant single-shell gas membrane made of EPDM rubber, tailored to container size with optional belt reinforcement for maximum protection. Fits biogas plant operators and biogas storage container builders.
• L15 Leakage Detection System Professional leak detection system for JGS (slurry, manure, and silage effluent) and biogas plants, with DIBt approval (no. Z-59.26-489) and a prefabricated apron between floor and wall foil that eliminates on-site welding, plus plug-in connections for lower installation costs. For biogas plant operators, EPC contractors, and slurry cellar/tank builders.
• Emission Protection Cover Tailor-made emission protection cover braced via centre support for slurry tanks, providing effective protection against emissions with inspection and service openings. Aimed at farms and agricultural businesses seeking emission control.
• Multi-Year Silage Films Long-term silage foils made of PVC-coated polyester fabric with fabric reinforcement for mobile silos, more resistant and durable than conventional variants. For farms and agricultural operations needing multi-season silage covers.
• Pasture Tents (Mobile Foil Shelters) Mobile foil shelters for feeding, overnight accommodation for animals, or storage for hay and straw bales. Sturdy, easy to assemble with no authorization required. Targeted at farms and agricultural operations.
• Roller Shutters & Sliding Curtains Modern roller shutters and sliding curtains as complete systems for agricultural needs, available in manual, electric, or radio-controlled operation. For farms and agricultural facilities.
• Fixed Cover & Side Ventilation Windbreak nets, foil tarpaulins, or combined variants in various colours up to 5.0 m height, featuring side ratchet system with hemstitch. For agricultural buildings needing weather protection and ventilation.
• Water Reservoirs & Ponds Versatile foils for swimming ponds, pools, water reservoirs, fire ponds, rainwater retention basins, clarification ponds, and irrigation basins, available in PEHD, PELD, PVC, PVC fabric, and EPDM materials. For landscapers and water feature constructors.
• Films & Nonwovens Geomembranes and fleeces for root protection, amphibian protection, cover foils in various thicknesses and formats, available in PEHD, PELD, PVC, PVC fabric, and EPDM materials. For landscaping and gardening professionals.
• Service and Maintenance Contract Annual professional inspection and servicing of tank covers and components including visual inspection, functional testing, leak testing with gas camera, and TRAS120 compliance documentation. Also suitable for covers from other manufacturers. For biogas plant operators seeking compliant recurring maintenance.

Quantifiable outcome

• Heat loss reduction of up to 30% with heat protection membrane while maintaining full usable gas storage volume
• +4 more outcomes

Named customers5 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Three partnerships are on record, tiered minor and core.

• German Biogas Association (Fachverband Biogas e.V.)minorGTM or Marketing PartnerJoint exhibition presence at international trade fairs including Salon del Gas Renovable in Valladolid, Spain. Association provides platform for industry visibility and networking within the German biogas sector.
• DLG (German Agricultural Society)minorGTM or Marketing PartnerJoint exhibition presence at trade events. DLG organizes agricultural exhibitions and provides platform for reaching farming communities and biogas operators.
• German Institute for Building Technology (DIBt)coreOthersDIBt issued general building authority approval (no. Z-59.26-489) for the L15 leakage detection system for use in JGS and biogas plants. This regulatory approval is essential for market access in Germany.

Scale indicators4 records

Recent moves10 records

Expansion highlights5 records

Emerging players

• Huesker: German manufacturer of geosynthetics and technical textiles used in biogas storage and containment applications; partial overlap as a substrate/membrane supplier for biogas tanks and covers.

Direct peers

• Sattler AG: Austrian family-owned manufacturer of technical textiles and membrane-based gas holders used in biogas and industrial gas storage, competing closely with Baur's double-membrane and EPDM membrane storage systems.
• Haase Energietechnik: German manufacturer of gas storage systems, pressure regulators, and gas safety equipment for biogas plants; directly comparable to Baur's double-membrane gas holders and biogas plant components.

Broad incumbents

• Hitachi Zosen Inova: Global EPC for waste-to-energy, biogas, and biomethane plants; competes on gas handling and storage subsystems where Baur's double-membrane gas holders can be specified as plant equipment.
• Ziemann Group: German industrial services and biogas plant construction company; competes in the biogas infrastructure market where Baur's storage systems are deployed.
• BioConstruct: European provider of turnkey biogas and biomethane plants with in-house gas storage and gas upgrading offerings; a comparable EPC+component supplier in the same biogas value chain.
• AgriKomp: German supplier of agricultural biogas plant technology including storage and gas management components; comparable agricultural-biogas customer base to Baur Folien.
• PlanET Biogastechnik: German biogas plant constructor offering complete plant solutions including gas storage; covers similar downstream customer use cases (biogas operators and EPCs) where Baur's products can be specified.
• MT-Energie / EnviTec Biogas: EnviTec Biogas AG operates biogas plant construction and operation in Germany and internationally; competes indirectly through EPC-led gas storage choices that could include Baur equipment.
• WELTEC Biopower: Germany-headquartered turnkey biogas plant builder with proprietary storage and gas utilization components; overlaps with Baur in gas storage modules supplied to biogas operators and EPCs.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/baur-folien

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Baur Folien