TGA | Dach & Solar brings together independent, specialized companies under one roof. What unites us: technical excellence, regional strength, and a shared set of values. Each company contributes its individual expertise – together, we ensure quality in existing buildings and develop sustainable solutions for the building technology of tomorrow.
Get to know our group of companies here:
Region: Western Germany
Location: Mönchengladbach
Services:
Germany’s Oldest Building Services Company
As a family-run specialist business now in its sixth generation, we have stood for quality in sanitary, heating and climate solutions for over 175 years.
We set high standards for customised solutions and technical know-how – strengthened through continuous training and the development of our next generation of employees.
Our tradition, professional expertise and use of modern technologies make us a reliable and efficient partner.
Region: Northern Germany
Location: Ahrensburg
Services:
Specialist company with over 50 years of experience
As a family-run master business based in Ahrensburg, we have been known for reliable heating installations, modern bathroom renovations and innovative climate technology solutions for over five decades.
With an experienced team of 65 skilled professionals, we offer tailored consulting, precise execution and professional implementation – also in the field of renewable energy, including heat pumps and solar technology.
Whether modernising heating systems, creating barrier-free bathrooms or upgrading to energy-efficient building services – we are your reliable and efficient partner for private and commercial projects in the greater Ahrensburg area and beyond.
Region: Eastern Germany / Berlin
Location: Berlin
Services:
Master crafts business for sanitary, heating, electrical and climate technology
As an experienced specialist company based in Berlin, we offer complete building services from a single source – from individual consulting and precise execution to turnkey handover.
Whether new build, refurbishment or modernisation: we reliably, efficiently and professionally deliver private and commercial projects.
Our services include sanitary installations, heating systems, climate technology and electrical engineering – always with a focus on sustainability, modern technology and energy-efficient solutions such as renewable energy systems and low-emission heating technologies.
Short response times, dedicated points of contact and a strong service mindset make GTB Gebäudetechnik Berlin the first choice for modern building technology in the capital region.
Region: Eastern Germany / Berlin
Location: Berlin
Services:
Electrical services provider for Berlin and the surrounding area
As an experienced electrical engineering company based in Berlin, GTB Berlin Elektrik offers a wide range of services in modern electrical systems – for private households, commercial businesses and industry.
From classic electrical installations to smart home solutions, e-mobility, lightning protection and both high- and low-voltage technology – we are your reliable partner for all electrical needs.
We support your projects from start to finish: consulting, planning and implementation all come from a single source – fast, transparent and professional. We rely on future-proof technologies, sustainable materials and a qualified team with master-level expertise.
Region: Eastern Germany / Berlin
Location: Berlin
Services:
Reliable service partner in Berlin
Whether for maintenance, consulting or emergencies – the GTB Berlin service team is fast, reliable and skilled.
As part of GTB Gebäudetechnik, we provide first-class service in heating, sanitary, electrical and climate technology – for private and commercial clients across Berlin.
Our goal: maximum customer satisfaction through personal support, short response times and solution-oriented action – whether online, by phone or on-site.
Always available when you need us.
Region: Eastern Germany / Berlin
Location: Berlin
Services:
Bathroom expert in Berlin
As a certified master business based in Berlin-Schöneberg, we are your reliable partner for bespoke bathroom renovations. From consultation to final handover, we create accessible, seamless and design-driven bathrooms – with a strong focus on quality and on-time delivery.
Using innovative materials and providing personal service, we design bathrooms that are both functional and visually compelling.
Region: Northern Germany
Location: Rostock-Warnemünde
Services:
Modern building services – 30 years of expertise
The family-owned company Gebr. Wachs GmbH specialises in heating, ventilation, sanitary systems and metal roofing work. Since 1990, we have been delivering reliable and efficient technical building services for private, public and industrial clients – with over 4,000 satisfied customers.
Our skilled team relies on modern technology, trusted brand products and a responsible approach to energy.
As a regionally rooted craft business, customer satisfaction is at the heart of what we do – with quality workmanship, fairness and a genuine handshake mentality.
Region: Nationwide
Location: Berlin
Services:
Roofing expertise for over 40 years
Whether industrial buildings, multi-family housing or listed heritage properties – we are your experienced partner for high-quality roofing systems with tile coverings or various sealing solutions.
For more than four decades, our clients have relied on us for new constructions, roof refurbishments and restoration projects.
From initial consultation through to professional execution, we deliver long-lasting, precise and visually appealing results – always with craftsmanship and reliability at the core.
For roofs that not only protect – but truly impress.
Region: Nationwide
Location: Mönchengladbach
Services:
Technical building services partner in Mönchengladbach
We provide tailored and efficient solutions across all areas of modern building services. Whether industrial facilities, commercial buildings, large-scale projects or private housing – we support our clients with technical precision, modern execution and reliable service.
We offer particular expertise in ventilation systems, including efficient air and climate solutions, and in insulation technology, where we rely on high-quality thermal and fire protection systems.
Our experienced team develops sustainable concepts that combine energy efficiency, safety and comfort.
Every project is approached with precision and professionalism – using high-grade materials, reliable components and absolute adherence to deadlines.
This makes us a strong partner for efficient and future-ready building technology.
Region: Western Germany
Location: Mönchengladbach
Services:
Service partner since 2009
Service Schalm GmbH specialises in the operation, maintenance and servicing of steam boiler systems, energy generation systems, and supply and disposal systems for commercial and industrial clients.
With our on-call service, we ensure safe and efficient plant operation. Our focus lies on systematic inspection, risk awareness and environmentally responsible practices.
With technical expertise and a committed team, we deliver customised solutions for demanding industrial requirements.
Region: Western Germany
Location: Willich
Services:
Electrical systems with structure
Since 1991, the name Teckenburg Elektroanlagen has stood for quality, reliability and performance. These strengths have made us one of the leading electrical specialists in the Willich region – serving businesses, private clients and public-sector customers.
As a high-performance provider, we ensure smooth project execution across all areas of modern electrical engineering.
Our qualified and dynamic team specialises in electrical installations, EIB/KNX systems, network cabling, Homeway systems, control cabinet construction, photovoltaic systems and modern safety solutions.
Whether residential buildings, commercial facilities, clinics or office complexes – we implement your project efficiently, proactively and to the highest quality standards.
Electrical engineering from a master crafts business. Regionally rooted. Future-focused.
Region: Western Germany
Location: Bielefeld
Services:
Specialist in professional electrical engineering
For nearly 90 years, we have combined craftsmanship with modern technology, continuous development and long-standing customer relationships across a wide range of industries.
With a highly qualified team, our company is a reliable and capable partner for the delivery and support of electrical systems – for industrial, commercial and public-sector clients.
Whether new construction projects or customised industry-specific solutions – our interdisciplinary team of technicians, master craftspeople, installers and commercial staff brings the expertise needed to deliver excellent results.
Electrical engineering with quality, experience and strong regional roots.
Region: Southwest Germany
Location: Mannheim
Services:
Electrical engineering partner in Mannheim
maba! Maler- und Ausbauerwerkstätten GmbH offers comprehensive electrical solutions for new construction, refurbishment and modernisation projects.
With an experienced team, we implement systems that meet the latest safety standards and are fit for the future.
Our portfolio includes the installation of fire and intruder alarm systems, medium-voltage switchgear, building automation technology and a wide range of modern system technologies.
With a holistic approach and the use of high-quality materials, we ensure quality, adherence to deadlines and personalised support for every project.
