Specialized Construction Activities

Jackcontrol AG 

Glarus · Since 2004

The core activity of Jackcontrol AG is the development, production and marketing of systems for optimizing and quality-assuring trenchless pipe laying methods, particularly in the field of microtunneling and underground pipe jacking. The company also offers design and consulting services for general planners and builders in connection with these methods.

JAKOB BERGER GMBH 

Sattel · Since 2002

JANE AG 

Neftenbach · Since 2020

Jaquet Design GmbH 

Villnachern · Since 2016

The core activity of Jaquet Design GmbH is the execution of core drillings in various materials such as concrete or stone, particularly in ceilings and walls.

JA Toit Sàrl 

Ardon · Since 2018

The core activity of JA TOIT sàrl is to provide services in the construction sector, particularly in the following areas: carpentry, roofing and timber framing, sheet metal work and processing, roofing, installation and assembly of windows, doors, Velux (skylights) and parquet (parquet floors), staircase construction, and exterior fittings (such as terraces and balustrades). The company thus offers a wide range of services in the construction sector, from planning to the execution of construction projects.

Jeker Heimwerk 

Münchenstein · Since 2021

The core activity of the company "Jeker Heimwerk" encompasses universal craftsmanship services, in particular: * Craftsmanship services in the area of house and garden, such as painting, masonry, clay plastering, assembly, fastening, repair, demolition, maintenance, cleaning and upgrading * Gardening and landscaping (since 01.08.2024 in cooperation with "Kestler Gartenhandwerk") The company thus offers a comprehensive range of services for various craftsmanship needs of customers.

Jerry AG 

Tagelswangen · Since 2021

The core activity of Jerry AG is the provision of skilled craftsmanship services in the field of facade construction, insulation, plastering and painting. In particular, the company offers solutions for the design and protection of facades, including compact facades, ventilated facades and conventional facades.

JF Concept Sàrl 

Lausanne · Since 2023

The core activity of JF Concept Sàrl is the planning, design and implementation of projects in the field of industrial piping, particularly in the area of district heating and cooling networks, as well as in sanitary and heating technology. The company offers services such as project management, site management, planning, calculation and execution of piping works, including the supply and installation of pipes, fittings and other components.

JFK Montagen GmbH 

Fulenbach · Since 2023

The core activity of JFK Montagen GmbH is the planning, development and installation of professional storage solutions, in particular industrial shelving systems, such as pallet racks, shelving systems, gravity pallet racks, pallet push-back systems, cantilever racks and shelving systems for multi-level warehouses and tire storage.

J. Ganguillet Ferblanterie-Couverture Sàrl 

Cormoret · Since 2018

The core activity of J. Ganguillet Sàrl encompasses various services in the construction sector, particularly: metalwork (including copper, stainless steel and other materials), roofing and maintenance, facade work, building insulation, installation of Velux windows and other skylights, lightning protection systems, installation of photovoltaic systems, installation of wood and pellet stoves, and interior renovations, including insulation, flooring and ceiling work. The company thus offers a wide range of services for the construction and maintenance of buildings.

Jimmy's-Brandschutz GmbH 

Liebefeld · Since 2019

The core activity of Jimmy's Brandschutz GmbH is the provision of services and solutions in the field of structural fire protection and coatings. This includes, in particular: fire protection claddings and coatings for steel and concrete structures, fire protection seals and firestops for walls, ceilings and installations, technical insulation for heat and sound protection, fire protection joints and mortars, and coatings and paints for fire protection and corrosion protection. The company offers these services to various industries and customers, including architects, general contractors, companies and private builders, covering the entire process from planning to execution to maintenance.

J. MARTINS Sàrl 

Riex · Since 2019

The core activity of J. Martins SÀRL is to provide services in the field of construction and renovation, including: masonry, tiling, painting, sanitary installations, kitchen and bathroom fittings, outdoor arrangements, earthworks, special works and civil engineering. The company also offers free estimates (DEVIS GRATUIT) and positions itself as a reliable partner for construction and renovation projects.

Joner AG 

Neuendorf · Since 2020

The core activity of Joner AG is the provision of services and solutions in the field of roof and facade treatment, including sheet metal work, flat roof renovations, sealing, roofing, facade cladding, roof drainage, sheet metal processing and metalwork.

Josef Christen AG 

Rain · Since 1976

Josef Christen AG is a construction company specializing in reinforcement and rebar installation. It provides estimating, reinforcement consulting and project execution for civil engineering, tunnelling, residential and commercial building, bridge and noise‑protection projects, and uses BIM and certifications such as WORKcontrol and ISAB.

Josef Gartner Switzerland AG 

Arlesheim · Since 1998

The core activity of Josef Gartner GmbH is the planning, design and installation of technically demanding facades for buildings. The company offers a wide range of services, including the development of facade solutions, the execution of facade projects and the manufacture of facade components.

JSB AG 

Zurich · Since 2012

The company's core activity is the provision of construction and architectural services, particularly in the areas of renovation, refurbishment, damage assessment and remediation, as well as building biology services such as thermography and electromagnetic field measurements. The company provides consulting and support services to private and institutional clients in the planning, execution and settlement of construction projects, including the identification of causes and the remediation of building damage.

JUNG Bausanierung GmbH 

Lucerne · Since 2025

The core activity of JUNG Bausanierung is the renovation and maintenance of buildings and areas, particularly concrete repair, concrete cosmetics and the implementation of exposed concrete projects, in order to preserve the value of real estate and repair damage in a cost-effective manner.

J. Zbinden Service AG 

Frauenfeld · Since 1977

The core activity of J. Zbinden Service AG is the provision of services and maintenance work in the field of tank facilities, particularly in the areas of: tank inspection and revision, decommissioning and shutdown of tank facilities, dismantling and repurposing of tank rooms, new installation of mobile tank containers, disposal and decommissioning of tank facilities, and sales of safe mobile tank and storage tank facilities. The company thus offers comprehensive solutions for the maintenance, upkeep and disposal of tank facilities.

Kälin Montagen GmbH 

Dachsen · Since 2006

Kälin Montagen GmbH specialises in cold storage and deep-freeze construction, supplying refrigerated rooms as well as doors and gates. The company provides planning, project management and installation services and offers maintenance, repairs and spare parts, and supplies COOL IT doors and ROMA wall systems.

Kambium Montagen GmbH 

Bassersdorf · Since 2022

The core activity of Kambium Montagen GmbH is the assembly and distribution of screw foundations, in particular Krinner screw foundations, for various construction projects such as single-family homes, tiny houses, small buildings, carports and others. The company offers consulting, assembly and equipment rental for self-assembly and has expertise in the entire construction sector, particularly in timber construction.