Temsol

What Temsol does

Temsol SAS is a France-based geotechnical engineering and structural repair specialist operating as a wholly-owned subsidiary of Groupe Cassous, a diversified construction conglomerate headquartered in Mérignac near Bordeaux. The company runs 16 regional agencies across mainland France and employs between 51 and 100 people, executing approximately 1,000 construction sites per year. Temsol's service portfolio is organized into four pillars: Sondages (geotechnical and environmental drilling, sampling, and in-situ testing such as pressiometric surveys, core drilling, and laboratory analyses); Fondations Spéciales (deep foundation and earth retention including micropiles, driven steel piles, Berlinoise walls, tie rods, nails, and shotcrete); Reprises en sous-œuvre (underpinning, consolidation injections, structural lifting, and slope stabilization for damaged buildings); and structural reinforcement and repair (now operated by the independent spin-off RENFOREP for concrete, wood, metal, and historic masonry).

Temsol's business model is project-based and quote-driven, with no publicly disclosed pricing and no SaaS or subscription component. Revenue is generated through professional services contracts with a diversified mix of individual homeowners (the primary segment for drought-related underpinning), housing collectives, industrial and commercial buildings, historical monuments, and public infrastructure clients including SNCF, Bordeaux Métropole, RTE, the French Ministry of Transport, and several French châteaux. The company is certified ISO 9001, MASE, QUALIBAT (I-IV for micropiles), and FNTP, and is approved by major insurance companies for post-disaster repair, which channels homeowner referrals. Two proprietary methods, SOLIPEX® (expansive resin injection for soil consolidation, used on ~100 structures per year) and CAVIBAG (surface-deployed cavity reinforcement via geotextile Big Bag armatures), provide technical differentiation, and an in-house equipment workshop customizes drilling and handling machinery to site-specific constraints. Temsol's wholly-owned subsidiary Coren handles post-disaster all-trades finishing, enabling an end-to-end property restoration offering within the Cassous Group ecosystem.

Name

Temsol

Legal name

Temsol SAS

Website

https://temsol.com

Company type

Private

Founded year

1964

Operating status

Operating

Headcount range

51–100 employees

Short description

Temsol is a French geotechnical engineering and structural repair specialist, operating 16 regional agencies across mainland France as a subsidiary of Groupe Cassous. It delivers drilling, deep foundations, underpinning, and structural reinforcement services to homeowners, public infrastructure operators, and heritage sites.

Ownership category

akta.pro rank

Product category

Geotechnical Engineering and Foundation Construction Services

NAICS

Architectural, Engineering, and Related Services (5413)

SIC

Services-Commercial Physical & Biological Research (8731), Services-Testing Laboratories (8734)

akta.pro primary industry

Ground Improvement & Soil Stabilization (DSM, Vibro, Grouting, Reinforcement) (IMAFAOAC)

akta.pro secondary industries

Temporary Works & Shoring (Sheeting, Bracing, Cofferdams) (IMAFAKAI), Civil, Foundations & Grounding/Earthing Works for HV T&D (EUAEABAH), Testing, Inspection, Certification & Commissioning (TICx) Technical Services (BPAHAIAL)

Keywords

• Geotechnical engineering services
• Special foundation construction
• Structural underpinning repair
• Soil surveying drilling
• Foundation repair services

Headquarters

HQ city

Mérignac

HQ country

France

HQ region

Europe

Offices15 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales, Others

Revenue model

1. Geotechnical Surveys and Soil Studies: Professional services for geotechnical investigations including pressiometric surveys, core drilling, destructive surveys, environmental sampling, and laboratory testing. Conducted for feasibility and execution studies of various structures.
2. Special Foundations and Support Structures: Installation of micropiles, driven steel piles, injection consolidation, tie rods, nails, shotcrete, Berliner walls, and secant micropiles for construction projects requiring deep foundation solutions.
3. Underpinning and Foundation Repair: Foundation repair services for damaged structures including concrete wells, reinforced concrete longrines, consolidation injections, and structural lifting. Addresses damage from drought, compressible soils, construction defects, and natural disasters.
4. Structural Reinforcement and Repair (RENFOREP): Structural repair and reinforcement services for concrete, wood, metal, and ancient masonry structures. Includes carbon fiber plates, waterproofing, crack injection, and emergency shoring. Brand launched in 2022, became separate company in 2024.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Temsol provides geotechnical engineering, special foundation installation, and structural underpinning/repair services across France through 16 regional agencies. Core service lines include Sondages (pressiometric surveys, core and destructive drilling, environmental sampling, laboratory testing), Fondations Spéciales (micropiles, driven steel piles, injection consolidation, Berliner walls, tie rods, shotcrete), and Reprises en sous-œuvre (concrete underpinning, longrines, structural lifting, slope stabilization). The company also delivers proprietary procedures such as SOLIPEX® expansive resin injection and CAVIBAG cavity reinforcement, and operates an in-house equipment workshop that fabricates customized drilling and handling machinery.

Product overview

Temsol is a geotechnical engineering and structural repair company operating across France through 16 regional agencies. The company offers an integrated portfolio of services grouped into three main divisions: Sondages (geotechnical and environmental surveys including drilling, sampling, and in-situ testing), Fondations Spéciales (special deep foundations and earth retention using micropiles, driven piles, and injection techniques), and Reprises en sous-oeuvre (structural underpinning and repair for damaged buildings). Temsol also develops proprietary methods including CAVIBAG for cavity reinforcement and SOLIPEX® for expansive resin injection. The RENFOREP sub-brand (now an independent company since 2024) handles structural reinforcement work on concrete, wood, metal, and historic masonry. The company maintains an internal equipment workshop for custom machine manufacturing, and its COREN subsidiary manages post-damage renovation and second-finish works. Temsol also operates an integrated engineering bureau for structural design.

Differentiator

Problem solved

Functional benefit

Products and services

• Sondages (Geotechnical Surveys) Geotechnical and environmental drilling, sampling, and in-situ testing services including pressiometric surveys, core drilling, destructive surveys with parameter recording, permeability tests, piezometer installation, inclinometer instrumentation, dynamic penetrometer and phicometer/vane shear tests, intact sampling for environmental purposes, and laboratory testing. Service is provided for feasibility and execution studies of construction projects.
• Fondations Spéciales (Special Foundations) Deep foundation and earth retention installation services including micropiles, driven steel piles, injection consolidation, cavity-filling injections, tie rods, soil nails, shotcrete, Berliner walls (parois berlinoises), and secant micropiles. Targeted at construction projects requiring deep foundation solutions and earth support in constrained sites.
• Reprises en sous-œuvre (Underpinning) Foundation repair and structural rehabilitation services for damaged buildings. Scope includes concrete underpinning wells, reinforced concrete longrines, consolidation injections, structural lifting (relevage de structure), slope stabilization (tirants d'ancrage, béton projeté, voile béton armé, parois berlinoises), geomembrane protection, anti-root barriers, and drainage. Addresses damage from drought, compressible soils, construction defects, and natural disasters on all types of structures.
• RENFOREP (Structural Reinforcement) Structural reinforcement and repair services covering concrete, wood, metal, and historic masonry structures. Includes emergency shoring, façade/floor/beam shoring, bay bracing, provisional metallic and wood props, definitive and provisional bracing of existing structures, crack stapling and matage, carbon fiber plates and fabrics, water-proofing and tanking, concrete reprofiling and rebar treatment, reinforcement by embedded steel or carbon armatures, crack injection, metallic profile reinforcement, and BA counter-slabs; timber repair (inertia reinforcement, epoxy mortar reconstitution, glued and screwed prostheses), metallic structure reinforcement (bolted/welded sections, bracing, modification of existing frames); and ancient masonry strengthening (tie rods, masonry stitching, Noubau floor reinforcement, coulinage).
• SOLIPEX® Expansive Resin Soil Consolidation Proprietary expansive resin injection procedure for soil consolidation that improves mechanical resistance and deformation characteristics of soil by reducing void index and increasing compactness. Used for treating differential settlement, accidental weakening of soil characteristics, initial bearing-capacity defects, and compaction defects under flooring; suitable for structures with light loads where heavier underpinning is impractical.
• CAVIBAG Cavity Reinforcement Proprietary cavity reinforcement method (Conception DIRA) combining classic drilling techniques with geotextile big-bag armatures and injection methods. Work is performed from the surface without requiring direct access to the cavity itself, uses geo-synthetic big bags for partial filling to preserve hydrogeological flows, and is suitable for underground cavity stabilization where access is constrained.
• COREN Renovation Subsidiary Wholly-owned subsidiary of Temsol acting as an all-trades renovation company specializing in repair and finishing work after damage. Handles second-stage finishing works (second œuvre) for clients referred by Temsol's structural reinforcement projects, providing a seamless restoration experience for property owners.

Quantifiable outcome

• Approximately 1,000 underpinning and reinforcement projects completed annually
• +2 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Five partnerships are on record, tiered core and minor.

• CORENcoreStrategic or Co-development PartnerCOREN is a wholly-owned subsidiary of Temsol specializing in post-disaster renovation and finishing work. When Temsol completes structural reinforcement, COREN handles second-stage finishing work, creating a seamless customer experience for complete property restoration.
• RENFOREPcoreStrategic or Co-development PartnerRENFOREP was launched in 2022 as Temsol's dedicated brand for structural reinforcement and repair activities. In 2024, RENFOREP became a separate company, representing Temsol's strategic expansion into specialized structural repair services.
• SOFFONSminorOthersProfessional union of drilling and special foundation companies. Temsol is a member, gaining industry representation and professional network benefits.
• STRRESminorOthersNational union of structural repair and reinforcement specialists. Temsol adheres to this union, positioning itself as a specialist in the field.
• SMAminorOthersInsurance company providing professional liability and activity guarantees for Temsol's construction and repair operations.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Socotec: Major French TIC (testing, inspection, certification) group offering geotechnical studies, soil testing, and structural diagnostics. Comparable to Temsol on the geotechnical-survey and laboratory-testing leg, though Socotec is a much broader, larger player.
• Soletanche Bachy: World leader in geotechnical and foundation engineering, part of VINCI Construction. Direct overlap with Temsol on micropiles, ground improvement, and special foundations, but operating at much larger global scale across infrastructure, energy, and building markets.
• Keller Group: Largest independent ground engineering specialist globally, offering piling, ground improvement, and geotechnical services. Direct technical overlap with Temsol's micropiles and underpinning services, but at significantly greater scale and geographic diversification.
• Bauer AG: German-based international specialist in foundation equipment and execution, active in deep foundations, ground improvement, and drilling. Comparable to Temsol across special foundations and geotechnical works, with both construction and equipment manufacturing.

Direct peers

• Ménard (VINCI Construction): Specialist in ground improvement and soil treatment (vibrocompaction, dynamic compaction, grouting). Closely comparable to Temsol's injection-consolidation and ground-stabilization techniques, with broader international reach.
• Franki Foundations (Besix Group): Belgian-founded specialist foundation contractor (now part of Besix) with French operations. Direct competitor in driven piles, micropiles, and underpinning, serving comparable infrastructure and building clients across France and Benelux.
• NGE Fondations: French special-foundations subsidiary of NGE, one of France's largest independent civil-works groups. Most direct French-headquartered competitor to Temsol in micropiles, injections, and underpinning, with broader group resources.
• Spie Fondations: Special-foundation arm of Spie Batignolles operating across France in micropiles, piles, and ground improvement. Directly comparable to Temsol in service scope, certifications, and customer base within the French market.

Emerging players

• Sixense (VINCI Construction): Engineering and digital-monitoring specialist serving geotechnical and structural projects. Adjacent peer to Temsol in geotechnical surveys (inclinometers, piezometers) and structural health monitoring referenced in Temsol's Sondages offering.
• RenforEP: Structural reinforcement and repair specialist spun out of Temsol in 2024. Same DNA and customer base (carbon fiber, masonry repair, emergency shoring) but now an independent operator, making it both a former sub-brand and a partial peer in the reinforcement line.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries2 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 Temsol