Maintenance. For Tomorrow.

Thermal, Cold and Sound Insulation

Insulation of:


  • Pipelines
  • Complex fittings
  • Containers
  • Boiler plants


• Thermal insulation up to temperatures of +1,300 °C
• Cold insulation up to temperatures of -200 °C
• Installation of electrical trace heating systems

Highest Quality.

Steel construction / maintenance

  • Steel and special constructions
  • Steel supporting structures
  • Platform construction
  • Railing construction
  • Welding, straightening and burning work
  • Industrial maintenance work

Professional and reliable.

Facade engineering

Construction and repair of:


  • Hall facades
  • Container facades
  • Industrial facade renovationung
  • All forms of enclosures
  • Integration of light-bands
  • Working with trapezoidal sheets / sandwich panels


  • Specialised company for working with products containing asbestos according to TRGS 519
  • Own network fitters

Environmental protection.

About us

QTEC GmbH is a medium-sized master business registered with the Düsseldorf Chamber of Handicrafts and operates in the following core areas:

  • Thermal, cold and sound insulation
  • Steel construction / maintenance
  • Facade engineering

QTEC GmbH was founded in 2011 by the managing partner Dr. Thomas Unterberg. The “Q” in the name stands for “Quality” and reflects our high professional standards. Our underlying philosophy is to provide technical solutions for complex industrial tasks whereby occupational safety and environmental protection are our top priority.


Our customers include in particular partners from the following areas:


  • Power plants
  • Metalworking industry
  • Foundries
  • Incineration plants
  • Filter plant construction

Dr. Thomas Unterberg

Managing partner
Lecturer at Heinrich-Heine University Düsseldorf
Quality manager

    Occupational safety.


    Quality management according to
    DIN EN ISO 9001

    Occupational Safety Management according to SCC including the petrochemical sector

    Water Resources Act
    according to WHG §19l

    Conformity of the company’s
    own production control

    Welding certification according
    to EN 1090

    Achieving success together.


    Seek fresh challenges with QTEC GmbH!


    We offer an attractive working environment with future-oriented jobs in the following areas:
    • Thermal, cold and sound insulators
    • Metalworkers
    • Welders (WIG/MAG/E)

    Qtec GmbH

    Bismarckstr. 120
    D-47057 Duisburg


    QTEC GmbH

    Bismarckstr. 120
    D-47057 Duisburg.

    Tel.: +49 0203 – 306 49 70

    Personal data, which you send to us using the above contact form, will be used exclusively to respond to your request and for the associated technical administration. The data will not be disclosed to third parties.

    You have the right at any time to revoke your permission to establish contact with future effect. In this case, your personal data that has been stored will be immediately deleted. After processing your enquiry, any further personal data will also be deleted.

    Further information on data privacy and the handling of personal data can be found in our data protection declaration.