The Slim series of aluminum frames stands out for its refined and understated design, featuring thin profiles and concealed hinges that offer unmatched flexibility in the design and decoration of a space.
According to EPAL’s high standards, the frames of this series offer a thermal transmittance coefficient (Uw) starting from 0.87 W/m²K, thanks to the longitudinal polyamide thermal break and double thermal insulating glazing. The superior sealing from moisture and air is ensured with two perimeter-applied EPDM seals. An additional advantage of the series is the multi-point locking system that provides a high level of security.
The uniquely designed tilt-and-turn windows owe their aesthetic superiority to the clean construction lines and the German-made hidden Roto NT Designo opening mechanism, which combines high functionality with subtle design.
The frames in the Slim series follow the principles of minimal aesthetics for comfortable spaces that impress. They can be combined with screens and shutters.
Why Slim?

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The EPAL SLIM series is a thermally-insulated window with an elegant design, stability, and ease of production, making it one of the best solutions for new constructions as well as the replacement of old windows.
Respecting the original design, it offers a significant improvement in thermal insulation.
It provides an unmatched design thanks to the use of the NT Designo mechanism by Roto-Frank, with hidden hinges, ensuring that nothing undermines the appearance of the window.
The windows of the EPAL Slim series have the following characteristics:
The EPAL Slim window series ensures:
EPAL imports glass panels from the largest glass manufacturing companies in the world.
The aluminum profiles of the EPAL Slim series are made from aluminum suitable for window construction (DIN 1748).
Alloy: AlMgSi05F22
Hardness (Brinell): 70
Tensile Strength (N/mm2): 125
Yield Strength (N/mm2): 160
Elongation A10 (%): 10
THE PROFILES OF THE EPAL Slim SERIES ARE DESIGNED BY EPAL:
The cross-sections of the aluminum profiles (frame and sash) of the EPAL Slim series have the following technical specifications:
| Frame Width: | – |
| Frame Height: | – |
| Frame Weight: | – |
| Leaf Width: | – |
| Leaf Height: | – |
| Leaf Weight: | – |
| Maximum Leaf Width: | 1600 mm |
| Maximum Leaf Height: | 2400mm |
| Maximum Leaf Weight: | 150kg |
The aluminum profiles of the EPAL Slim series are coated with electrostatic paint in a new and ultra-modern facility of EPAL, after proper surface treatment (pre-cleaning and coloring) to ensure optimal paint adhesion and guarantee high quality and durability.