
Master carpentry business for roof renovation, energy-efficient insulation and custom timber construction in the greater Ulm area

Zimmerei & Holzbau Wiedmer
Achstetten-Stetten (DE)New on Amplifa
About Zimmerei & Holzbau Wiedmer
Zimmerei & Holzbau Wiedmer is a registered master craft business from Achstetten-Stetten with a focus on the renovation and repair of existing roofs for private customers. The range of services covers roof renovation and conversion, roof trusses and roofing, dormers and rooftop extensions, roof window replacement, asbestos remediation on roofs and facades as well as blown-in insulation made of cellulose or mineral wool. In timber construction, the business fabricates and erects carports, sheds, garages, garden houses, bin enclosures as well as terraces, balconies, loggias, pergolas and canopies. Work is carried out with sustainable building materials such as wood, cellulose and wood fibre; the scope of work also includes flat roof work with liquid plastic and roofing work on pitched roofs. In addition, the business offers consulting, KfW funding advisory, building application and approval planning as well as support with owner-provided work. As a family business with its own training programme, the company operates in the greater Ulm area, Ehingen, Biberach, Neu-Ulm and Laupheim.
- Site
- Achstetten-Stetten
- Processes
- Roof renovation & repair, Dormers & rooftop extensions, Roof trusses and roof covering, Roof windows (replacement & installation), Asbestos remediation (roof & facade), Blown-in insulation of cellulose/mineral wool (roof, facade, top-floor ceiling), Above-rafter insulation with wood fibre boards + between-rafter cellulose, Flat roof renovation with waterproofing by liquid plastic
- Materials
- Wood (building material, roof trusses, timber construction), Siberian larch (rhombus cladding), Garappa wood (terrace decking), Cellulose (isofloc blown-in insulation), Wood fibre (boards/above-rafter & counter-batten insulation), Mineral wool (blown-in insulation), Trespa panels (gable/balcony cladding), Liquid plastic (flat roof waterproofing)
- Certificates
- Master craft business in carpentry (HWK), Building energy consultant (HWK), Specialist company for insulation technology / ISOFLOC site manager, Specialist company for asbestos remediation in accordance with TRGS 519, Annex 4, Master craft business in carpentry (HWK Ulm), Asbestos remediation in accordance with TRGS 519, Annex 4, ISO 9001
- Founded
- 2009
- Industries
- Private customers / residential renovation, Craft trades (B2B projects, e.g. butcher's shop extension)
- 01
Consultation & on-site appointment
- 02
Individual planning with material selection
- 03
Quotation & scheduling (including KfW funding advisory, building application)
- 04
Fabrication/construction in timber construction method
- 05
Execution & assembly on the construction site
- 06
Clean handover
Materials & Building Methods
Wood (building material)
Main material for roof trusses, dormers, carports, terraces, balconies and canopies.
Cellulose (isofloc blown-in insulation)
Ecological between-rafter and ceiling insulation for roof renovations.
Wood fibre
Boards for above-rafter and counter-batten insulation to KfW standard.
Mineral wool
Alternative to cellulose for blown-in insulation of roof, facade and top-floor ceiling.
Siberian larch (rhombus cladding)
Long-lasting facade cladding, among other things for gables and bin enclosures.
Garappa wood
Tropical hardwood for terrace decking with concealed screw fixings.
Trespa panels
Low-maintenance cladding for gables, balconies and garden houses.
Liquid plastic
Waterproofing for flat roof renovations.
Laminated safety glass / acrylic
Glazing for terrace and balcony canopies.
Tiles
Roof covering, e.g. Nelskamp Planum Longlife.
Aluminium sheet
Cladding for dormers.
Steel
Substructures for balconies and staircases.
Location

Achstetten-Stetten
DEWorkshop and office
- Lot size
- Individual projects
- Materials
- Wood, cellulose, mineral wool, wood fibre
- Crane (for roof work, according to a customer testimonial)
Construction Services & Structures






Inside the production










Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Roof renovation & repairAssembly | – | – | – | – | Wood, Cellulose, Wood fibre |
| Dormers & rooftop extensionsAssembly | – | – | – | – | Wood |
| Roof trusses and roof coveringAssembly | – | – | – | – | Wood, Tiles |
| Roof windows (replacement & installation)Assembly | – | – | – | – | – |
| Asbestos remediation (roof & facade)Surface | – | – | – | – | Asbestos (removal) |
| Blown-in insulation of cellulose/mineral wool (roof, facade, top-floor ceiling)Surface | Insulation thickness e.g. 24 cm | – | – | – | Cellulose (isofloc), Mineral wool |
| Above-rafter insulation with wood fibre boards + between-rafter celluloseSurface | Counter-batten insulation 60 mm wood fibre boards | – | – | – | Wood fibre, Cellulose (isofloc) |
| Flat roof renovation with waterproofing by liquid plasticSurface | – | – | – | – | Liquid plastic, Bitumen (removal), Gravel (removal) |
| Carports, sheds, garages, garden houses, bin enclosures (timber construction)Assembly | – | – | – | – | Wood, Rhombus cladding (Siberian larch), Trespa panels |
| Terraces, balconies & canopies (timber construction, pergolas, loggias)Assembly | – | – | – | – | Wood, Laminated safety glass, Acrylic, Trespa, Garappa wood, Steel |
| Facade cladding (rhombus cladding, Trespa)Assembly | – | – | – | – | Siberian larch, Trespa panels |
| Roof truss conversion / extension / dormer construction in existing buildings (flat roof dormers,Assembly | 30 cm high rafters | – | – | – | Wood, Aluminium sheet (cladding), Tiles (Nelskamp Planum Longlife) |
| Consulting & planning incl. building application/approval planning and KfW funding advisoryEngineering | – | – | – | – | – |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Crane (for roof work) | – | – | – | – | Achstetten / construction sites in the greater Ulm area |
Additional services
Reference customers
Qualifications & Quality
As a registered master craft business of the Chamber of Crafts Ulm, the team works with certified qualifications, including building energy consulting (HWK), insulation technology (ISOFLOC site management) and asbestos remediation in accordance with TRGS 519, Annex 4. Project quality is evidenced by regular customer surveys with more than 50 reviews (including 4.86 out of 5 on ProvenExpert).
| Evidence | Achstetten-Stetten |
|---|---|
| Master craft business in carpentry (HWK Ulm) | |
| Building energy consultant (HWK) | |
| Specialist company for insulation technology / ISOFLOC site manager | |
| Asbestos remediation in accordance with TRGS 519, Annex 4 | |
| ISO 9001 |
History
- 1994
Start of the professional career in the carpentry trade ("wood is our craft – since 1994")
- 2009
Andreas Wiedmer obtains the master craftsman title and founds Zimmerei & Holzbau Wiedmer
- 2018
LEA SME award as a socially engaged company for promoting young talent in the craft trades, including a children's holiday programme and practical projects with the IHK Ulm for refugee young people
- 2018
Construction of a canopy for the food stalls at the Burgrieden festival