
Window renovation, entrance doors, burglary protection, window shutters and insect screens – planning, measuring and installation from a single source.
Fenstersanierungs AG Mittelland
Birren 17, 5703 Seon, SwitzerlandNew on Amplifa
About us
Fenstersanierungs AG Mittelland is a construction company specialising in window renovations, based in Seon in the canton of Aargau. The company plans and executes renovations and new builds in the field of windows and entrance doors, complemented by burglary protection, window shutters and louvered blinds, insect screens and roller shutter replacement. Products used include wood-aluminium windows, plastic windows (also foil-wrapped) and entrance doors with visible larch surface, fitted with triple solar insulating glazing (e.g. CLIMATOP LUX, Ug 0.7 W/m²K). The installation crews specialise in renovations and handle old window removal, installation, structural connection and crane work, coordinated with other trades. A project manager accompanies the project from quotation to acceptance; service, maintenance and repairs are also provided after installation. The main areas of activity are the cantons of Aargau, Zurich, Lucerne, Solothurn and Bern.
- Site
- Seon
- Processes
- Window renovation (removal of old windows, installation of new windows, structural connection), Window planning and measuring (on-site survey, execution documents, ordering production), Entrance door installation, Burglary protection / security window installation, Window shutters (installation), Insect screens for windows and doors (installation), Louvered blind installation (including renovation technique with windows set further inwards), Roller shutter replacement (including detail solutions in the roller shutter box, service cover
- Materials
- Wood-aluminium (wood-alu windows), Plastic (PVC windows), Plastic, foil-wrapped, Larch (visible on the inside, entrance door), PVC (surfaces according to manufacturer care instructions IDEAL Fensterbau), Wood (surfaces according to manufacturer care instructions), Aluminium (surfaces according to manufacturer care instructions), Solar insulating glazing CLIMATOP LUX (triple insulating glazing, Ug 0.7 W/m²K)
- Certificates
- Project management from quotation to acceptance, Service after installation
- Founded
- 2015
- Industries
- Private customer business, Construction industry (renovation and new build), Private customer business / construction industry (window and door renovation,
- 01
On-site consultation and property survey
- 02
Quotation and planning with execution documents
- 03
Measuring on site
- 04
Ordering production from selected manufacturers
- 05
Installation (removal, installation, structural connection, crane work)
- 06
Acceptance, instruction, service and maintenance
Materials and systems
Wood-aluminium windows
Window systems with aluminium outer shell, including Ideal Plano with flush-mounted sash.
Plastic (PVC), also foil-wrapped
Easy-care window profiles, optionally foil-wrapped for coloured surfaces.
Wood / larch
For entrance doors with visible larch surface on the inside and wooden windows.
Solar insulating glazing CLIMATOP LUX / LUX Diamant
Triple insulating glazing with Ug 0.7 W/m²K and high solar energy gain.
Location

Seon
CHHead office with showroom
- Materials
- Wood-aluminium, PVC, wood
- Showroom with windows, entrance doors, window shutters and insect screens in original size
Components




Inside the production






Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Window renovation (removal of old windows, installation of new windows, structural connection)Installation | – | – | – | – | Wood, Aluminium, PVC, Glass |
| Window planning and measuring (on-site survey, execution documents, ordering production)Engineering | – | – | – | – | – |
| Entrance door installationInstallation | – | – | – | – | Aluminium, Wood |
| Burglary protection / security window installationInstallation | – | – | – | – | PVC, Aluminium, Wood |
| Window shutters (installation)Installation | – | – | – | – | Aluminium, Plastic, Wood |
| Insect screens for windows and doors (installation)Installation | – | – | – | – | – |
| Louvered blind installation (including renovation technique with windows set further inwards)Installation | – | – | – | – | – |
| Roller shutter replacement (including detail solutions in the roller shutter box, service coverInstallation | – | – | – | – | – |
| Service, maintenance and repairs after installationInstallation | – | – | – | – | – |
| Crane work / lifting of window elements (including large glass elements over the roof)Installation | – | – | – | – | – |
Additional services
Reference customers
Quality
Every element is measured on site before production; acceptance is carried out together with the customer, including instruction in operation and care. The company also handles maintenance and repairs after installation.
| Evidence | Seon |
|---|---|
| Project management from quotation to acceptance | |
| Service after installation |
History
- 2015
Foundation; operating at the Seon location since 2015.