Specialized Construction Activities

Dosch Mechanik AG 

St. Margrethen Sg · Since 1993

The core activity of Dosch Mechanik AG is the execution of turning and milling work, particularly also in larger series, as well as the performance of diving or underwater work.

DrySite AG 

Schafisheim · Since 2024

DrySite AG provides technical building drying, leak detection and water-damage remediation services. It performs damage analysis and precise leak localization, coordinates drying and restoration work, and supplies documentation for insurers, property managers and construction clients.

E. Deléderray toitures S.A. 

Lausanne · Since 1995

The core activity of E. Deléderray Toitures SA is the execution of works in the fields of roofing, sheet metal work, facade cladding, roof waterproofing, metal processing and photovoltaic systems. The company also offers services such as building design and planning.

Feuerpark GmbH 

Rothenthurm · Since 2020

The core activity of Feuerpark GmbH is the sale, consulting and construction of various types of fireplaces, including wood fireplaces, chimneys, chimney stoves, pellet stoves, oven construction, wood stoves, outdoor fireplace construction and accessories. The company also offers an exhibition of fireplaces in Rothenthurm and supports customers in planning and implementing their fireplace wishes.

G.E.R. SA 

Meyrin · Since 2002

The core activity of G.E.R. SA consists in the planning, manufacturing, assembly and maintenance of industrial plants as well as the realization of networks for gases and liquids. In particular, the company focuses on the following areas: Chemistry: installations for production in various chemical fields Petrochemistry: revamping of refineries and petrochemical plants Pharmaceuticals: installations for production in various pharmaceutical fields Networks: construction of networks for district heating, district cooling, gas and other liquids. The company also offers services in the field of welding technology and has received various certifications in this area.

Hans Wenger-Wagner AG 

Reigoldswil · Since 2012

The core activity of Hans Wenger-Wagner AG is the renovation, construction and refurbishment of buildings. The company offers services in the areas of masonry, plastering, screed laying and civil engineering.

Historfen AG 

Stachen · Since 2009

The core activity of historfen AG is the restoration, renovation and manufacture of windows, particularly historic and listed windows. This also includes advisory services for builders, construction managers and heritage conservationists in the restoration and preservation of historic windows.

h. strahm baugeschäft gmbh 

Grenchen · Since 2009

The company's core activity is the execution of renovation and restoration work in the construction industry, including painting, plastering, drywall and masonry work. The company also provides services such as drying and support for builders in the planning and execution of construction projects.

Isoltech Sàrl 

Plan-Les-Ouates · Since 2017

Isoltech Sàrl carries out insulation works and provides thermal, acoustic and fire‑stop insulation services. Services include insulation of pipes, ventilation ducts and building elements, including fibre‑ or paste‑based fire‑stop solutions performed in accordance with applicable standards.

Jan SA 

Montherod · Since 1994

The core activity of Jan SA is the provision of services in the field of construction and renovation work, particularly in the following areas: plastering and drywalling (plâtrerie & revêtements à sec), building and plastering (bâtissage & enduits), painting and wall coating (peinture & revêtements muraux), peripheral insulation (isolation périphérique), and fire protection measures and insulation (compartimentage & obturations coupe-feu). The company offers these services particularly for the field of historic buildings and monuments and has many years of experience in this area.

KAGO AG 

Goldau · Since 1981

The core activity of KAGO AG is the development, manufacture and delivery of products and services for the rail industry, particularly in the areas of contact clamps, earthing and cable ranges, cable routing and cable fastening, track connection boxes and balise covers, insulation, contact and bird protection as well as special assemblies, personnel leasing and machine leasing.

Kreis Gebäudetechnik AG 

Winterthur · Since 2023

The core activity of Kreis Gebäudetechnik AG is the planning, execution and maintenance of sanitary, heating and ventilation systems for residential and commercial properties, including consulting, new construction, bathroom renovation, repairs and service work.

Lehmbau Georg Paul 

Laufen · Since 2015

The core activity of Lehmbau Georg Paul is the planning, consulting and execution of construction projects with a focus on ecological and natural building materials such as clay, lime and straw. The specific services include: clay construction, house building, plastering, drywall construction, masonry, painting, consulting for ecological and sustainable building, and courses and hands-on construction sites for ecological and sustainable building. The company focuses on creating healthy and sustainable living spaces and offers individual and personalized solutions for customers.

Leuenberger Dienstleistungen AG 

Zell Lu · Since 2002

Leuenberger Dienstleistungen AG provides cold milling (pavement milling), shaft/manhole milling, extraction of height-adjustable shaft covers, dry cleaning of milled surfaces and transport services. The company operates road milling machines, dry-cleaning carriers and transport vehicles.

Lizards Sàrl 

Geneva · Since 1999

The core activity of Lizards is the sale and installation of fireplaces (chimneys) as well as related services such as consulting, training and after-sales service. In particular, the company specializes in bioethanol fireplaces and also offers other types of fireplaces such as gas and electric fireplaces.

Lucchini AG 

Dietikon · Since 1983

The core activity of Lucchini AG encompasses the provision of services in the construction sector, specifically: masonry work, conversions and renovations, and water damage restoration. The company offers a comprehensive service from a single source, including expert consulting, meticulous planning, and precise execution.

Mon-Air Lüftungs- und Klimatechnik AG 

Hünenberg · Since 2005

Mon-Air Lüftungs- und Klimatechnik AG designs, plans and installs ventilation, air-conditioning and refrigeration systems. The company also offers maintenance and servicing, hygienic system cleaning and consulting for small to medium projects.

Munz AG Sanitär Heizung 

Schönenberg An Der Thur · Since 1993

The core activity of Munz AG is the planning, consulting and execution of sanitary and heating systems, including renovation, new construction, refurbishments and service work. This also includes the areas of floor heating, water treatment and bathroom planning.

Mythen Bau GmbH 

Brunnen · Since 2021

The core activity of Mythenbau GmbH is the provision of craft services in the field of renovations, conversions and modernizations of buildings and rooms, including exterior facades, painting, plastering, flooring and other craft activities.

Nobs SA Sanitaire-chauffage 

Yvonand · Since 1985

The core activity of Nobs SA encompasses the installation and maintenance of sanitary facilities, heating systems, renewable energy systems, and water networks. Specifically, the company offers the following services: installation and maintenance of sanitary facilities (e.g. for kitchens, bathrooms, laundry rooms), installation and maintenance of heating systems (e.g. central heating systems), installation and maintenance of renewable energy systems (e.g. solar systems, heat pumps), and installation and maintenance of water networks (e.g. for villas and residential buildings). The company also provides emergency services and maintenance work for these facilities.