SlimLine38 aluminium windows
SlimLine 38 (SL 38) is a high-performance aluminium window and door system. It is designed to combine maximum visual lightness with a stable construction and modern thermal insulation. SlimLine38 aluminium windows are particularly suitable for projects where the aesthetics of steel frames need to be preserved. At the same time, they meet modern energy efficiency and comfort requirements. SlimLine38 aluminium windows are available as both inward and outward opening windows and doors. This provides wide configuration options. SL 38 profiles retain the characteristic visual identity of a slim line. This feature is especially in demand in industrial, minimalist and modern architecture projects. It also makes the system an ideal choice for restoring historical buildings, where it is important to preserve the original look of steel windows while introducing a thermally improved and energy-efficient solution with SlimLine38 aluminium windows.
Slimline 38 windows – Light, elegance and comfort
The SL 38 system is available in 3 different minimalist design variants, Classic, Ferro and Cubic, to match the architecture of the building perfectly. Windows and doors can be fitted with double and triple glazing without losing their extra-slim look.
- Extra-slim frame
- Steel frame look
- Double and triple glazing options
- Certified products
- U-value as low as 1.4 W/m²K
Style options
The SL 38 system is available in 3 different minimalist design variants – Classic, Ferro and Cubic – to fully meet the requirements of your project. Windows and doors can also be fitted with double and triple glazing without losing their extra-slim look.
![]() |
![]() |
![]() |
| Ferro | Cubic | Classic |
Downloads
Technical characteristics
| Maximum frame height | 2800 mm |
| Maximum frame width | 1200 mm |
| Maximum weight | 170 kg |
| Total frame depth | 99 mm |
| Min. glass thickness | 16 mm |
| Max. glass thickness | 62 mm |
Performance
Comfort
| Air tightness, maximum test pressure | 4 (600 Pa) | |
| Water tightness | 9A (600 Pa) | |
| Wind load resistance | C4 (1600 Pa) | |
| Acoustic performance | 45 dB |
Safety
| Burglar resistance | RC2/WK2 |
Energy
| Thermal insulation | (Uf) 1,9 W/m²K |
Opening options
Inward opening

Outward opening

Citi veidi

Performance

Energy

Thermal insulation
(Uf) 1,9 W/m²K


