The SlimLine 38 (SL 38) aluminium joinery systems from Reynaers Aluminium are modern, elegant, and highly functional solutions, designed for both residential and commercial buildings. They perform exceptionally well in the renovation of historic properties and add a touch of luxury and refinement to contemporary apartments.
Thanks to their versatility, SlimLine 38 systems have become a favourite among architects — frequently used in new builds as well as in the modernisation of older buildings. The system provides an attractive alternative to slim but costly steel-framed constructions, making it ideal for renovating traditional steel windows while maintaining the building’s original façade and improving thermal performance.
Slimline 38 product range – what makes the Ultraslim aluminium door system stand out?
SlimLine 38 is one of the innovative systems from Reynaers Aluminium. It features extremely slim profiles and a minimalist aesthetic, offering various product configurations, including:
- Fixed windows
- Side-hung windows
- Tilt-and-turn windows
- Hinged doors
The system comes in four refined design variants — Classic, Ferro, Cubic, and Functional — allowing perfect integration with different architectural styles. Despite its slim design, SlimLine 38 supports both double and triple glazing, offering a wide range of solutions tailored to any project.
Ultraslim technology – key advantages
A highlight of this product line is the Ultraslim door system. Structural bonding of the glass to the frame allows for even narrower profiles without compromising strength or glazing size. The result? Maximum daylight access and an even more refined appearance.
Configurations aligned with modern architectural trends
- The updated SlimLine 38 series offers a variety of configurations, such as:
- Tall tilt-and-turn windows
- Patio doors with concealed hinges
- Classic entrance doors with a three-point lock
Each configuration of the new SlimLine 38 reduces the visible frame width even further — by approximately 40 mm compared to the previous series — without sacrificing performance. Thermal efficiency remains excellent (Uf from 1.7 W/m²K), and the reinforced profiles support sash weights up to 150 kg.
The system also allows for double-leaf entrance doors up to 3 metres high, maintaining an RC2 security rating.
Optional enhancements include:
- Concealed hinges – for a refined, seamless look.
- Mosquito screens – enjoy cool evenings without disturbance.
- Glass balustrades – combining beauty with safety.
- Concealed drainage – no visible plastic covers, just clean, modern design.
Versatile applications of the Slimline 38 System
One of the system’s greatest strengths is its flexibility in use. SlimLine 38 performs beautifully in modern homes, luxury villas, and high-end commercial properties. It complements industrial, loft, and minimalist interiors equally well.
It can be installed both in new buildings and in historic restorations. Available in single or double-sash variants, with or without glazing bars, SlimLine 38 adapts to any design concept.
Its large glazed areas and subtle aluminium frames create a refined, light-filled effect that perfectly matches luxury interiors and premium façades.
SlimLine 38 doors work equally well as exterior entrance doors or interior partitions, particularly in spacious, contemporary residences. They also pair beautifully with RB Glass balustrades, creating harmonious, light-filled spaces.
Benefits of installing the Slimline 38 system from Reynaers Aluminium
Using the modern SlimLine 38 solution brings many benefits. Although many people focus primarily on appearance and finish aesthetics, Reynaers Aluminium window and door systems also offer functional and safe solutions. Models with RC2 burglary-resistance class protect the interior of the home. The doors are durable and resistant thanks to the exceptional properties of aluminium. The material is strong, long-lasting and resistant to weather conditions and corrosion.
Reducing the profile width allows even more natural light to enter the interior — a feature increasingly appreciated by homeowners. The building becomes more elegant and gains a contemporary look.
Reynaers Aluminium profiles are characterised by excellent thermal insulation parameters. They ensure high airtightness and thermal comfort inside the building. Despite their slimmer geometry, they remain a highly energy-efficient solution.
