Timber-aluminium windows
Timber inside, aluminium on the facade.
DUOLINE combines a 68, 78 or 88 mm timber frame with 14 mm exterior aluminium cladding. Choose the glazing and finishes to suit your project.
Timber-aluminium windows
DUOLINE 68
Timber-aluminium window with a 68 mm timber frame and 14 mm exterior cladding. Total depth 82 mm, with pine or meranti inside and a RAL exterior finish.
DUOLINE 78
Timber-aluminium window with a 78 mm timber frame and 14 mm exterior cladding. Total depth 92 mm, with pine or meranti inside and a RAL exterior finish.
DUOLINE 88
Timber-aluminium window with a 88 mm timber frame and 14 mm exterior cladding. Total depth 102 mm, with pine or meranti inside and a RAL exterior finish.
Two materials, one coordinated window
Total installation depths are 82, 92 or 102 mm. Coordinate interior and exterior colours, facade connections and glazing from the measurement stage.
SOFTLINE · DUOLINE · 2026
Timber & timber-aluminium windows
The natural character of timber, with or without exterior aluminium cladding. Explore the six SOFTLINE and DUOLINE systems in our 2026 brochure for renovation and new construction.
DUOLINE 68Show specifications
- Material
- Timber-aluminium
- Timber frame (mm)
- 68
- Total depth (mm)
- 82
- Seals
- 4
- Glazing (mm)
- 24–44
- Uw / Ug (W/m²K)
- 0,90 / 0,6
DUOLINE 78Show specifications
- Material
- Timber-aluminium
- Timber frame (mm)
- 78
- Total depth (mm)
- 92
- Seals
- 4
- Glazing (mm)
- 24–50
- Uw / Ug (W/m²K)
- 0,80 / 0,5
DUOLINE 88Show specifications
- Material
- Timber-aluminium
- Timber frame (mm)
- 88
- Total depth (mm)
- 102
- Seals
- 4
- Glazing (mm)
- 32–58
- Uw / Ug (W/m²K)
- 0,79 / 0,5
| System | Material | Timber frame (mm) | Total depth (mm) | Seals | Glazing (mm) | Uw / Ug (W/m²K) |
|---|---|---|---|---|---|---|
| DUOLINE 68 | Timber-aluminium | 68 | 82 | 4 | 24–44 | 0,90 / 0,6 |
| DUOLINE 78 | Timber-aluminium | 78 | 92 | 4 | 24–50 | 0,80 / 0,5 |
| DUOLINE 88 | Timber-aluminium | 88 | 102 | 4 | 32–58 | 0,79 / 0,5 |
Source: BO Fenster 2026 brochure, pp. 3–8 and 13. Uw refers to the window, Ug to the glazing. Uw values are calculated with a thermally insulating Swisspacer spacer. Actual performance depends on dimensions, glazing and options; final specifications are provided in your quotation. DUOLINE total depths include 14 mm of aluminium cladding; seal counts follow the brochure comparison table.
SOFTLINE · the character of timber
68, 78 or 88 mm profiles in laminated pine or meranti. Custom shapes and decorative elements can suit the building, including heritage projects subject to their requirements. An aluminium profile protects the bottom of the sash.
DUOLINE · timber inside, aluminium outside
The 68, 78 or 88 mm timber profiles have an additional 14 mm aluminium cladding. Total installation depths are therefore 82, 92 or 102 mm. Exterior finishes can be selected from the RAL colour range.
Timber species & finishes
Pine and meranti with four protective coats. Opaque paints or stains that reveal the grain, including white, light oak, walnut, teak, graphite and olive green. Colours vary by timber species; confirm your selection with a sample.
Hardware & glazing
MACO MULTI-MATIC hardware with two security keeps, micro-ventilation on tilt-turn sashes and aluminium handles. Decorative or functional glazing and Swisspacer Ultimate spacers depending on configuration. Optional handles with keys or safety buttons.
Timber finishes
View data sheet · PDF (FR)Timber-aluminium windows
A proposal suited to your building
Share your dimensions, photos and priorities. We will clarify the configuration and installation with you.