ISOTEC specialist company for damp and mould remediation: sealing, horizontal barrier, drying and balcony renovation.
Abdichtungstechnik Walzer GmbH (ISOTEC-Fachbetrieb)
Kenzingen · Steinen (DE) · Muttenz (CH)New on Amplifa
About us
Abdichtungstechnik Walzer GmbH, headquartered in Kenzingen, is a specialist company of the ISOTEC group specialising in the elimination of damp and mould damage in buildings. Its service portfolio includes horizontal barriers using hot-injected special paraffin against rising damp, multi-layer exterior and interior sealing, crack injection with synthetic resin combined with the Flexband system, salt-buffering restoration plaster, mould elimination in accordance with applicable standards, interior insulation with calcium silicate, humidity-regulating climate panels, building drying as well as cellar floor, cellar ceiling and balcony renovations. An internal process leads from the initial enquiry, through on-site measurement-based damage analysis, to remediation. Work is carried out by the company's own trained team of technicians. The company employs around 25 staff at the Kenzingen, Steinen and Muttenz (Switzerland) locations and has renovated around 3,000 objects in ten years, including commercial projects such as the Riegeler brewery and the Schwabentor in Freiburg.
- Site
- Kenzingen
- Processes
- Horizontal barrier (paraffin injection), Exterior sealing (multi-layer, incl. polymer-modified thick bitumen coating KMB), Interior sealing (multi-layer, flexible sealing slurry), Crack injection/Flexband (crack injection with synthetic resin from crack width > 0.2 mm, Flexband, Restoration plaster (salt-buffering restoration plaster, diffusion-open), Mould elimination (in accordance with applicable standards, with enclosures and extraction, Interior insulation (incl. calcium silicate insulation), Climate panel (humidity-regulating panel, raises wall surface temperature)
- Materials
- Paraffin (special paraffin), Bitumen (polymer-modified thick bitumen coating KMB), Synthetic resin, Liquid synthetic material, Calcium silicate, Restoration plaster, Concrete, Masonry
- Certificates
- TÜV Rheinland certified, Great Place to Work Certified, Best Employers in North Rhine-Westphalia (category 10-49 employees), W&Z, 10-year warranty
- Founded
- 2010 (ISOT
- Employees
- 25 (Walzer family:
- Industries
- Building remediation, Building protection, Housing sector, Commercial and object construction, Housing sector (private customers), B2B building renovation
- 01
Enquiry (telephone, e-mail, form)
- 02
On-site appointment for damage analysis
- 03
Discussion of the remediation proposal
- 04
Remediation by skilled professionals
- 05
Acceptance with warranty of up to 10 years
Materials and processes
Special paraffin (horizontal barrier)
Injected hot at over 100 °C into the dried masonry, forming an approx. 15 cm thick barrier layer against capillary moisture.
Polymer-modified thick bitumen coating (KMB)
Used in the multi-layer exterior sealing of earth-contacting building components.
Flexible sealing slurry
Multi-layer interior sealing system for cases where exterior sealing is not possible.
Synthetic resin (crack injection)
Seals water-bearing cracks in concrete from a crack width of over 0.2 mm.
Flexband system (special tape with adhesive)
Bonded over moving cracks and joints and combined with crack injection.
Salt-buffering restoration plaster
Absorbs building-damaging salts, is diffusion-open and supports the drying out of the masonry.
Calcium silicate
Insulation material for interior insulation, particularly on listed facades.
Climate panel
Humidity-regulating mineral panel that raises the wall surface temperature and prevents condensation moisture.
Liquid synthetic material
Sealing material for balcony and terrace renovation with visually appealing surface systems.
Locations
Kenzingen
DEHeadquarters / ISOTEC specialist company
- Materials
- Special paraffin, KMB, sealing slurry, synthetic resin, restoration plaster, calcium silicate, climate panel, liquid
Steinen
DEBranch location
Muttenz
CHAbdichtungssysteme Walzer AG (subsidiary, since 2017)
Services and systems
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Horizontal barrier (paraffin injection)Surface | – | – | – | – | Masonry, Paraffin (special paraffin, hot-injected at over 100 °C, |
| Exterior sealing (multi-layer, incl. polymer-modified thick bitumen coating KMB)Surface | – | – | – | – | Bitumen (KMB), Masonry, Concrete |
| Interior sealing (multi-layer, flexible sealing slurry)Surface | – | – | – | – | flexible sealing slurry, Masonry |
| Crack injection/Flexband (crack injection with synthetic resin from crack width > 0.2 mm, FlexbandJoining | Crack width > 0.2 millimetres | – | – | – | Concrete, Synthetic resin, Special tape (Flexband), Adhesive |
| Restoration plaster (salt-buffering restoration plaster, diffusion-open)Surface | – | – | – | – | Restoration plaster, Masonry |
| Mould elimination (in accordance with applicable standards, with enclosures and extractionSurface | – | – | – | – | Plaster, Mould-infested surfaces |
| Interior insulation (incl. calcium silicate insulation)Surface | – | – | – | – | Calcium silicate, Insulation materials |
| Climate panel (humidity-regulating panel, raises wall surface temperature)Surface | – | – | – | – | Climate panel (mineral), Wall |
| Drying system (building drying after water damage)Surface | – | – | – | – | Building fabric |
| Cellar floor renovation (sealing of damp cellar floors)Surface | – | – | – | – | Concrete, Cellar floor |
| Balcony renovation (sealing of balcony/terrace surfaces, surface systems, incl.Surface | – | – | – | – | Liquid synthetic material, Coatings, Coverings |
| Cellar ceiling insulation (thermal-bridge-free installation, low build-up height)Surface | – | – | – | – | Insulation materials, Cellar ceiling |
| Plinth sealingSurface | – | – | – | – | Sealing material, Plinth/masonry |
| Wall/footing junction (wall-footing sealing)Surface | – | – | – | – | Sealing material, Concrete, Masonry |
| Garage renovationSurface | – | – | – | – | Floor coverings, Coatings |
| Liquid synthetic coatingSurface | – | – | – | – | Liquid synthetic material |
| Damage analysis / moisture analysis (measurement-based testing with moisture measuring devices)Testing | – | – | – | – | Building fabric |
Additional services
Reference customers
Quality
Quality controls are carried out by TÜV Rheinland; a 10-year warranty and, as a rule, a fixed price are offered on selected services. Every remediation is preceded by a measurement-based moisture and cause analysis carried out by building surveyors.
| Evidence | Kenzingen | Steinen | Muttenz |
|---|---|---|---|
| TÜV Rheinland certified | |||
| 10-year warranty | |||
| Great Place to Work Certified |
History
- 1983
Foundation of the first ISOTEC specialist company by Horst Becker (ISOTEC group)
- 1990
Gebr. Becker GmbH becomes an ISOTEC pilot operation
- 1998
Gregor Waltermann and Stephan Zwiener launch Waltermann & Zwiener (OWL)
- 2010
Thomas Walzer founds the ISOTEC specialist company Abdichtungstechnik Walzer in Kenzingen
- 2012
Renovation of the Schwabentor Freiburg
- 2014
Expansion with branches in Lörrach and Waldshut
- 2017
Foundation of Abdichtungssysteme Walzer AG in Muttenz near Basel by son Fabian Walzer
- 2025
Jochen Jacobs takes over management; Thomas Walzer remains shareholder and building surveyor