The EPAL SLIM range, consisting of thermally insulated frames with smart design, stability and ease of production, constitutes one of the best solutions for new constructions as well as replacement of old frames.

It offers greatly improved thermal insulation while respecting the original style.

Its unparalleled design uses a Roto-Frank NT Desegnio mechanism with concealed hinges, so that nothing undermines the appearance of the window.

The frames of the EPAL Slim range have the following characteristics:

  • Profile with a polyamide thermal break of 32mm along its entire length
  • Dual action frames (Tilt & Turn).
  • They are equipped with Roto-Frank NT Desegnio mechanisms with concealed hinges, for superior aesthetics and design
  • Crimp corners.
  • EPDM perimetric gaskets for perfect sealing.
  • A multi-point locking system designed to operate flawlessly and effortlessly, while maintaining its style and durability.
  • Constructed using specific materials and fittings which fulfill predefined high-quality specifications.
  • They are accompanied by screens or blinds.
  • Constructed using specific materials and fittings which fulfill predefined high-quality specifications.
  • Manufactured under controlled production processes that ensure consistently high quality.
EPAL Slim Window

The frames of the EPAL Slim range follow minimalist trends, with thin borders and no unnecessary elements, while always complying with the strict insulation and safety standards followed by EPAL.

The Epal Slim range ensures:


  • Exceptional thermal insulation. The EPAL Slim system allows the construction of frames with excellent thermal insulation characteristics (up to Uw = 0.87 W/m2K).
  • High sound insulation levels: Rw (C; Ctr) = 38 (-2; -6) dB weighted sound reduction index (with triple glazing 6Planistar – 15 – 4 – 15 – 4)
  • High resistance to mechanical stress during use and very good functionality.
  • Superior aesthetics with a wide range of colors and high quality electrostatic powder coating.
  • These protruding windows rotate outwards and can be easily cleaned from the inside, while offering maximum ventilation and an almost effortless operation.

EPAL frames are installed by expert technical staff on any surface, using special fittings and insulating materials that ensure a perfect fit.

EPAL imports glass panes from the world’s leading glass producers.

The EPAL Slim frame systems are equipped with double thermal insulating glazing. The type of glass used is Float glass. The main combination is a 6mm Planistar glass outside, 4mm glass inside, and a gap of 15mm between the two glass panes (6Planistar – 15 – 4).

This combination has a thermal transmittance of Ug=1.0 W/m2K and very good soundproofing properties (Rw = 36dB, according to ISO140/3-78 tests – Test No. Α6.121.96).

The double glazing is initially glued using two Butyl PIB cords (special plastic glue) which are placed along the perimeter of the aluminum spacer placed between the two glass panes. Butyl PIB is highly resistant to temperature variations: -30°C to 80°C and 160°C (for a limited period of time) and has very low thermal conductivity. The aluminum spacer is filled with desiccants that ensure a longer life for the glass pane.

Apart from the special Butyl PIB glue, an additional two-component glue (polysulfide sealant) is used externally along the perimeter of the glass; this glue is elastic and also highly resistant to temperature variations. In this way, the air between the two glass panes does not come in any contact with the ambient air, therefore it is impossible for the glass to become less transparent over time.

EPAL has been certified by the German Ift Rosenheim Institute regarding the sealing processes of thermal insulating glazing and thermal insulating glazing using gas in accordance with the DIN EN 1279-2 and DIN EN1279-3 standards.

The aluminum profiles of the EPAL Slim range are made of aluminum suitable for manufacturing frames (DIN 1748).

Alloy: AlMgSi05F22

Hardness (Brinell):70

Breaking strength (N/mm2): 125

Yield stress (Ν/mm2):160

Elongation Α10 (%):10



  • Protected by intellectual property rights (patents) registered with the O.B.I. (Hellenic Industrial Property Organisation).
  • Manufactured using extrusion dies designed/owned by EPAL that undergo strict tests regarding acceptable deviations.
  • They are used exclusively by EPAL.


The sections of the aluminum profiles (frame and sash) of the EPAL Slim range have the following technical characteristics:


Technical characteristics of the frame
Frame width : <to calculate later>
Frame height: <to calculate later>
Frame weight: <to calculate later>
Technical characteristics of the sash:
Sash width: <to calculate later>
Sash height: <to calculate later>
Sash weight: <to calculate later>
Maximum sash width: 1600
Maximum sash height: 2400
Maximum sash weight: 150kg


The aluminum profiles of the EPAL Slim range are painted using electrostatic powder coating in the new, state-of-the-art EPAL plant after appropriate surface treatment (preliminary degreasing and chromating), to ensure better paint adhesion as well as high quality and durability.