What Renesco does

Renesco is a Swiss-headquartered international specialty contractor providing structural waterproofing and injection/grouting services for underground and hydraulic infrastructure. Established in 1965 and operating as a wholly-owned subsidiary of the Marti Group, a privately held Swiss family-owned underground construction conglomerate with approximately 80 group companies, Renesco focuses exclusively on sealing tunnels, dams, pumped-storage facilities, and other underground structures against pressurized and non-pressurized water. The company's service portfolio spans four core lines: waterproofing (thermoplastic welding of PVC, TPO/TPE, FPO, and PEHD geomembranes, sheet and spray-applied systems, and a proprietary fully automated hot-melt installation process); injection and grouting (cementitious, chemical including polyurethane and acrylic resins, and a hybrid cementitious-polyurethane system with automated variable resin addition); hydraulic structure services (drip shields, exposed geomembrane systems with face-anchorage tensioning profiles, and internal waterproofing for water and sprinkler tanks); and rehabilitation of aging underground assets. Technical differentiators include the ability to operate at groundwater pressures exceeding 100 meters of waterhead, support 100+ year service life requirements, and execute in seismically active and alpine environments.

The business operates on a project-based, quote-driven professional services model, with revenue generated through subcontracting relationships with general contractors and direct contracts with infrastructure owners. Pricing is not publicly disclosed; contracts are awarded through competitive tendering for government and enterprise infrastructure projects. Renesco serves a concentrated set of large public and enterprise customers including Transport for London, HS2 Limited, Swiss Federal Railways, Thames Tideway, EDF/Hinkley Point C, Verbund Hydro Power, Nant de Drance, Uniper Kraftwerke, BBT SE (Brenner Base Tunnel), CERN, and the Virginia Department of Transportation. The customer base spans government transportation, railway, energy (hydropower and nuclear), and research infrastructure across Europe and North America. Renesco maintains operating offices in Switzerland, Germany, Austria, Slovakia, the United Kingdom, Norway, the United States, and Canada, with additional project work in further countries.

Go-to-market is enterprise field sales, executed through regional offices that manage local business development, tendering, and project delivery. Marketing channels include a professional website with project portfolio, participation in tunneling and infrastructure industry events, and direct engagement with infrastructure owners and contractors. Renesco holds the German §19l WHG certification for geosynthetics installation and the OENORM S 2078 Austrian certification for landfill systems, supporting its qualification for regulated hydraulic-structure and environmental projects. The company is part of the broader Marti Group ecosystem, which provides additional tunneling and underground construction capabilities, enabling Renesco to act as both a subcontractor and a self-performing contractor on select projects.

Name

Renesco

Legal name

Renesco AG

Website

https://renesco.com

Company type

Private

Founded year

1965

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Renesco is a Swiss-headquartered international specialty contractor providing structural waterproofing and injection/grouting services for tunnels, dams, pumped-storage facilities, and underground infrastructure, serving government transport authorities, railway operators, and energy companies across Europe and North America.

Ownership category

akta.pro rank

Headquarters

HQ city

Bern

HQ country

Switzerland

HQ region

Europe

Offices8 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Specialty waterproofing services: Project-based specialty contracting services for sealing operations in underground structures, including geomembrane installation, sheet waterproofing, and liquid-applied coatings. Revenue is generated through direct contracts with infrastructure owners and general contractors on large-scale construction projects.
2. Injection and grouting services: Cementitious and chemical grouting/injection services for ground stabilization, water sealing, and structural rehabilitation. Billed as subcontracting services on tunneling and infrastructure projects.
3. Specialized drilling services: Vertical, inclined, and sub-horizontal drilling works combined with grouting technology for anchor bolting and ground consolidation.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Renesco is an international specialty contractor providing structural waterproofing, injection/grouting, and hydraulic structure services for underground infrastructure projects such as tunnels, dams, pumped storage plants, and water reservoirs. Founded in 1965 and operating as a wholly-owned subsidiary of the Marti Group, the company delivers tailor-made, practical-oriented, and cost-effective subcontracting solutions including thermoplastic welding of geomembranes, sheet and spray-applied waterproofing, cementitious and chemical grouting, specialized drilling, and digital quality control with BIM integration.

Product overview

Renesco, established in 1965 and part of the Marti Group Switzerland, is a specialty construction services company offering an integrated portfolio of waterproofing, injection/grouting, hydraulic structures, and rehabilitation services for underground construction projects. The core offerings include Waterproofing Services (geomembrane application, sheet waterproofing, spray-applied coatings, hot-melt automated installation), Injections & Grouting Services (cementitious, chemical, and hybrid grouting technologies), Hydraulic Structures Services (dams, pumped storage, reservoirs, water tanks), and Rehabilitation Services. Key sub-products include Water & Frost Protection systems using PE-foams, Light Membrane Vault for rail tunnels, Humidity & Moisture Protection/Drip Shield systems, and specialized drilling services. The company operates through multiple divisions across Switzerland, Germany, Austria, Slovakia, USA, Canada, UK, and Scandinavia, providing tailor-made solutions for large-scale tunnelling, infrastructure, hydraulic, environmental, and rehabilitation projects worldwide.

Differentiator

Problem solved

Functional benefit

Products and services

• Waterproofing Services Comprehensive structural waterproofing services for tunnels, dams, and underground structures, including thermoplastic welding of geomembranes (PVC, TPO/TPE, FPO, PEHD), sheet waterproofing installation (loose-laid, fully bonded, post-applied, pre-applied), liquid and spray-applied waterproofing and coatings, and fully automated hot-melt sheet waterproofing installation for tunnelling. Serves infrastructure owners, general contractors, and tunnel operators on large-scale construction projects.
• Injections & Grouting Services Specialty injection and grouting services including cementitious grouting (compensation, permeation, contact grouting, curtain grouting, compaction grouting), chemical injection (acrylic, polyurethane, epoxy, silicate resin), and hybrid grouting combining cementitious and polyurethane technologies for challenging ground conditions. Serves tunnelling and infrastructure projects requiring ground stabilization and water sealing.
• Hydraulic Structures Services Waterproofing and rehabilitation services for dams, pumped storage schemes, canals, reservoirs, hydraulic pressure tunnels, shafts, water towers, sprinkler tanks, and wastewater treatment facilities using geomembrane systems and liquid-applied coatings. Serves hydroelectric power companies, water utilities, and dam operators.
• Rehabilitation Services Tunnel rehabilitation, refurbishing, renovation, upgrading, and retrofitting services to extend structure lifetime, improve safety, reduce maintenance costs, and extend service life of underground infrastructure. Serves government agencies and infrastructure owners seeking life-extension of existing tunnels, dams, and hydraulic structures.
• Water & Frost Protection Scandinavian-style water leakage control and frost insulation solution using PE-foam or LD-PE sheets, including BIM modelling, pre-assembling, automated drilling and bolting operations, membrane/insulation sheet mounting, and tunnel drains installation. For tunnel operators in cold-climate regions.
• Light Membrane Vault Lightweight tunnel waterproofing system using PVC-coated polyester reinforced cloth suspended in steel pipe arches secured with rock bolts, designed for light rail constructions to prevent dripping water. Self-extinguishing with low smoke production rate per ISO 9705/ISO 11925-2 standards.
• Humidity & Moisture Protection / Drip Shield PVC-coated polyester fabric system fastened to steel wire arched frames bolted into rock, providing moisture protection for personnel, traffic, and technical equipment in shafts, tunnels, technical niches, rock caverns, and underground facilities.
• Drip Shield (Hydraulic Structures) Suspended PVC-coated polyester geomembrane fabric installed beneath roof areas to collect water drips, prevent leakage over equipment and slabs. Features 700 g/m² unit weight, high tear and tensile strength, and fire/smoke resistance class. Used in dams, pumped storage plants, and hydraulic structures.
• Water & Sprinkler Tanks Systems Internal waterproofing systems for potable water tanks, water towers (above ground and below ground, including cavern installations), and sprinkler tanks in hospitals, shopping centers, and office buildings.
• Cementitious Grouting Cement-based grouting services using hydraulic binders, expanders, and wash-out admixtures for compensation grouting, ground stabilization, contact grouting, curtain grouting, compaction grouting, and Lugeon water permeability testing.
• Chemical Injection/Grouting Chemical injection services using acrylic, polyurethane, epoxy, and silicate resin for waterproofing underground structures, crack sealing, concrete rehabilitation, ground consolidation, and cavity filling.
• Hybrid Grouting/Injection Combined cementitious and fast-setting hydrophobic polyurethane injection system for water-enriched environments, providing early ground strengthening, stabilization, and sealing through automated polymer-stabilized cement grouting with controlled resin addition.
• Drilling Services Specialized drilling works including vertical, inclined, and sub-horizontal drilling in soil or rock, cuff-like pipe drill holes up to 60-100m, inclinometer drill holes, and anchor bolting combined with waterproofing systems.
• Quality Control & Digital Monitoring State-of-the-art grouting control and reporting systems with real-time monitoring, data acquisition, processing, visualization, and steering capabilities for construction quality assurance.

Quantifiable outcome

• 100+ years service life achievable for underground structures with proper waterproofing
• +1 more outcomes

Named customers11 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

Feature7 records

Partnerships

One partnership is on record.

• Marti GroupcoreStrategic or Co-development PartnerRenesco is a wholly-owned subsidiary of the Marti Group, a Swiss owner-operated family business specializing in underground construction. This relationship provides Renesco with in-house expertise as a multidisciplinary organization with capabilities ranging from transportation tunnel construction to specialty underground services. Marti Group operates approximately 80 Group companies across the construction industry.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Mapei S.p.A. Mapei is a global manufacturer of adhesives, sealants, chemical products, and waterproofing systems for the construction industry, including underground and tunneling applications. Comparable as a broad incumbent offering waterproofing products and solutions that compete with Renesco's specialty installation services.
• Fosroc International: Fosroc is a global construction chemicals company offering waterproofing, concrete repair, grouting, and sealing solutions for tunneling, dams, and infrastructure. Comparable to Renesco as a broad-line waterproofing and injection grouting incumbent serving overlapping customer segments in tunneling and hydraulic structures.
• Sika AG: Sika is a global specialty chemicals company with a broad waterproofing, sealing, bonding, and concrete systems portfolio covering tunneling and infrastructure. Comparable to Renesco as an incumbent waterproofing supplier/installer with far larger scale and product breadth, but Renesco operates in a narrower specialty niche.
• Master Builders Solutions (BASF): Master Builders Solutions (formerly BASF Construction Chemicals) supplies concrete admixtures, grouts, and waterproofing systems for tunneling and underground construction globally. Comparable as a broad-line construction chemicals/waterproofing incumbent competing for similar tunnel and infrastructure specifications.

Direct peers

• Carpi Tech (now Carpi/Bureau BES): Carpi Tech is a specialist in synthetic geomembrane waterproofing for dams, tunnels, and hydraulic structures — historically the closest head-to-head competitor to Renesco in exposed geomembrane dam systems and tunnel waterproofing, with overlapping client base in hydroelectric and underground infrastructure.
• Normet Group Oy: Normet provides sprayed concrete, rock reinforcement, and underground construction chemicals and equipment for tunneling and mining projects. Comparable to Renesco as a specialty supplier to the underground construction industry with overlapping customer base in tunnel contractors and infrastructure owners.
• GCP Applied Technologies (Saint-Gobain): GCP Applied Technologies (now part of Saint-Gobain) supplies specialty construction chemicals including waterproofing membranes, injection grouts, and concrete admixtures for tunneling and infrastructure. Comparable to Renesco's chemical injection and waterproofing product lines, particularly in Europe and North America.
• Naue GmbH & Co. KG: Naue is a German manufacturer and installer of geosynthetics, geomembranes, and sealing systems used in tunnels, dams, and hydraulic structures. Comparable to Renesco on the materials/installation side of structural waterproofing, particularly for European tunneling and environmental projects.
• Webac Chemie GmbH: Webac is a German specialist in injection resins, polyurethane grouts, and chemical sealing systems used in tunnel and structural waterproofing. Comparable to Renesco's chemical injection and grouting services, with overlap on European tunneling and infrastructure customers.

Others

• Marti Group (parent): Marti Group is the Swiss family-owned parent conglomerate of Renesco, providing general contracting and civil engineering services for tunnels and underground construction across ~80 Group companies. Listed here as an ecosystem/related party: Renesco often serves as preferred specialty subcontractor on Marti-led projects, making the group both a parent and a customer/channel partner.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

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 Renesco