Custom made and highly thermally efficient, the Solarlux Highline bi-fold door is stylish, practical and perfect for projects aspiring to passive house standards. It can deliver exceptional overall U-values (Uw-values) of 0.8 W/m²K.

Made from high-performance glazing and heat-insulated aluminium, the Highline is able to reflect radiant heat, which improves energy efficiency and comfort by reducing heat loss and heat gain. 

Further insulation properties are created through the use of advanced thermal technology and a specially-designed, patented multi-functional break profile called the bionicTURTLE®.

It can also be complemented with passive standard Highline windows, or used to create a passive standard open corner.

• Excellent thermal performance of glass, doors and shutters: Very low U-values (Uw > 0.8 W/m²K) that can meet passive house standards (under 0.89 W/m²K)
• Option to integrate fixed, tilt or tilt-and-turn Highline windows that open inward to either the right or the left. The windows can be seamlessly matched to your Highline bi-folding door, so the profiles, paint, coatings and even passive house capabilities are all consistent
• Can be used to create passive standard open corners
• Advanced thermal breaks and thermally insulated profiles to prevent air leakage
• Aluminium
• Bespoke solution with panels up to 3.5m high and 1.1m wide
• Maximum weight per panel 110kg
• Sightlines of 99mm - among the slimmest on the bi-fold market
• Double and triple glazed options
• Made in Germany as a fully finished product using components and materials from a single site, rather than pre-fabricated in the UK using parts from various manufacturers
• Complies with the PAS 24 British security standard for doors and windows
• Over 26 different configurations for open in/open out, left/right, or left and right
• Flush, weather-rated threshold
• Fully customisable finishes and colours
• Optional exterior blinds and integrated track lighting