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Solarlux Highline Bifold Doors
Offering the same ultra-slim 99 mm sightlines as the Ecoline, the Highline system steps up performance with increased panel sizes and improved thermal insulation. With a 84 mm building depth, Highline is ideal for projects that demand larger openings, premium finishes, and unmatched flexibility.
RC2/RC2N-rated burglar resistance for maximum peace of mind
Wind load resistance class B4 for exposed installations
Air permeability class 3 for consistent performance
Water tightness rated up to class 9A
Thermal transmission coefficient of Uw > 0.8 W/m²K
Sound reduction index Rw up to 45 dB for enhanced acoustic control
Designed for Large-Scale Openings
Slim sightlines meet structural performance
With a robust 84 mm profile depth and premium-grade fittings, Solarlux Highline is built for larger, heavier bifold panels while preserving the elegance of minimal frame design. Its patented bionic TURTLE® thermal break ensures optimal insulation even with expansive glazing, making it the go-to choice for modern architects and developers seeking seamless transitions, enhanced comfort, and long-term durability.
System Highlights & Technical Details
Precision-engineered for performance, flexibility, and long-term durability.
Profile System
- Modular aluminium profile system with high-performance thermal insulation and choice of two building depths: 67 mm for Ecoline or 84 mm for Highline
- Bottom-running; minimal load support required in case of falls
- Edged profiling
- Minimum sight line of 99 mm in the panel profile joint
- Single-piece, multi-functional, fibreglass-reinforced polyamide bionic TURTLE® break profile
- Loose shear bond built into thermal break to compensate for thermal loads
- Mitred panels connected by corner pieces that are glued and pressed together on the inside to create a sturdy joint
- Controlled drainage
- Built-in running tracks and guide rails
- Separate levels for runners and locks
- Floor track (accessible and suitable for living spaces) available
- Built-in, concealed cable routing
Sealing System
- The seal encompasses two all-round sealing levels with constant gap sizes and even seal pressure between the panels
- Sealing levels not interrupted by fittings
- Sheathed foam seals with optimum sliding properties
- With optional convection chamber interruption seals for improved thermal transmittance
- Up to three sealing levels available
Design Variants
- Panels fold either inwards or outwards, to either left or right
- Left and right sliding panel pairs also available
- Floor track designs without rebates in compliance with German standard DIN 18040 on “Accessible construction”
- Floor tracks available as minimal floor tracks without height offset
- RC2/RC2N version available as an option
- Tilting or turn-and-tilt panel can be built into the frame-side
- panel of a panel pair with concealed fittings
- Modular system allows folding, tilting, turn-and-tilt and fixed elements to be combined in a single frame with an uninterrupted floor track thanks to integral profile
- Bi-folding door available on balustrade or with top light in a frame
Fittings
- No protruding running tracks or guide rails
- Fittings with one-hand operation in profiles
- With optional built-in Twin X concealed panel centring mechanism for high wind loads
- System hinges also suitable for heavy panel weights
- System adjustment mechanism built into sub-frame rebate, outside the sealing level
- The specially shaped stainless-steel running track with tapered track roller allows the use of unguided carriages
- Stainless steel ball bearing runner mechanism: stainless steel track rollers and stainless-steel bearing surfaces for quiet running and very long service life
- Easy-running, low-wear carriage fitted with double-row deep-groove ball bearings and built-in anti-prying guard
- Sliding lock or optional lock-in-place panel for controlled ventilation
- High-quality, stainless-steel Solarlux designer handles
- Lock-in-place, one-hand operation thanks to special gears with stroke of 24 mm
- Pass door available with latch-key-activated, multi-point lock and profile cylinder
- Secure hinge pins
- Secure cleaning pin with convenient unlocking mechanism and misuse prevention system to allow cleaning of the outsides of the panels on inwards-opening bi-folding door elements
- Thanks to its defined locking points, this cleaning pin can be used for both paired and unpaired bi-folding doors
- Lock monitoring system with reed contacts and concealed cable routing
- Patented “Comfort Snap” panel catch
- Optional load-transferring plates with centring grooves and sealing cushions for mounting the sub-frame profiles and floor track
- Additional mounting screw covers in frame rebate
Environment & Sustainability
- Sustainable manufacturing
- Certified disposal in accordance with DIN EN ISO 14001:2009
Certifications & Testing
- In-house production control
- Tested in accordance with DIN EN 1090, design class EXC 1 & EXC 2
- Certified in accordance with DIN ISO 9001
What Our Customers Say
We take pride in delivering exceptional glazing solutions and outstanding customer service. Here’s what some of our happy clients have to say about working with Minimal Frame Projects.
Highline in Premium Architecture
Explore large-scale applications of Highline in residential and commercial projects
