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Solarlux SL 97 Bifold Doors
The SL 97 is a premium timber and aluminium bifold system engineered for exceptional thermal performance and passive house compatibility. With triple glazing, deep profiles, and sustainable materials, it provides durability, warmth, and modern versatility.
Water tightness rated to class 7A for maximum weather protection
Wind resistance class C3 for structural stability
Air permeability class 3 for consistent performance
Thermal transmission coefficient Uw ≥ 0.80 W/m²K
Wood/aluminium combination protects profiles from weathering
Certified for passive house and low-energy construction
Natural Insulation Meets Architectural Precision
Perfect for passive house performance with a warm finish
Crafted from laminated timber with aluminium weather shields, the SL 97 system offers triple glazing, acoustic sealing, and deep thermal insulation. Its high-performance wood/aluminium hybrid design is suitable for bottom- or top-running configurations and provides unmatched energy efficiency. Designed for comfort, aesthetics, and sustainability, it is ideal for eco-conscious homes and bespoke residential architecture.
System Highlights & Technical Details
Precision-engineered for performance, flexibility, and long-term durability.
Profile System
- Wood/aluminium profile system suitable for passive house standards, made using laminated wood with rear-ventilated aluminium cover and an additional layer of insulation
- Pine and spruce available as standard; other woods optional
- Rigid foam insulation
- Running and guide rails are built flush into the system.
- Aluminium covers in accordance with the guidelines for aluminium/wood windows issued by ift Rosenheim (German Institute for Window Technology).
Sight Lines
- Frame: 45 – 108 mm
- Panel: 85/103 mm
- Panel joint: 184 mm
- Frame building depth: 96 – 122 mm
- Panel building depth: 96 mm
Sealing System
- Seals provide multiple lines of defence for excellent impermeability
Glazing
- Suitable for use with glass thicknesses of 24 – 46 mm
- Dry glazing
Design Variants
- The system is fitted with running gear at the bottom as standard, top running gear available as an option
- All designs come with swing panel, free choice of swing panel position
- Panels fold either inwards or outwards and slide to left and/or right
Fittings
- Fittings partly concealed in profiles
- Hinges have adjustable width and height, and are equipped with secured hinge pins
- “Bottom runner” version: stainless steel rollers and stainless-steel bearing surface
- “Top runner” version: runners with independent axles, stainless steel sealed bearings and plastic bearing surfaces for quiet operation
- Panels lockable in any partly open position
- Solid stainless steel Solarlux designer handles
- Espagnolette with stroke of 24 mm
- Pass door always fitted with handle-operated, multi-point locking system, lock and profile cylinder
Environment & Sustainability
- Certified timber from sustainably managed forests
- Water-dilutable varnishes and lacquers
- Clean, separate disposal; no mixed materials
- Certified disposal in accordance with DIN EN ISO 14001:2009
- Sustainable manufacturing
- Internal production control
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.
SL 97 in Eco-Modern Projects
Explore how SL 97 delivers comfort, performance, and sustainability in timber-aluminium builds
