A spacious room with a Solarlux Combiline bi-folding door

Combiline Bi-Folding Door

The Solarlux Combiline bi-folding door seamlessly combines the best of both worlds with the warmth of a wood finish internally and the durability of an aluminium profile externally.

The Perfect Combination For A Weatherproof Solution

The Combiline’s 86mm frame depth enables this composite bi-folding door to be specified with either double or triple glazing. The doors feature a slender sight line of 143 mm at the panel joint even when using large and heavy panels. The narrow sightlines ensure maximum transparency when the door is closed, in keeping with your natural approach to living. Solarlux also a offer a fully timber bi-folding door, the Woodline, find out more here.

Technology at a glance

Burglar Resistance




Air Permeability


Water Tightness

Up to 7A

Thermal Transmission Coefficient

Uw > 1.1 W/m²K

Sound Reduction Index

R’w up to 42 dB

System Description

Combiline Bi-folding Door Profile Systems

  • Thermally insulated wooden window system with a building depth of 86 mm in the panel profile
  • Multi-laminated, high-quality wooden beams made using selected rifts and half-rifts
  • Bottom-running; minimal load support required in case of falls
  • Edged (R2) wooden panel frame profiles
  • Single-piece, multi-functional bionicTURTLE® break profile force-fitted flush into wood panel
  • The panels are manufactured with a form-fitted corner joint. A rounded collet fits exactly into the slot on the counter-piece, and an additional screw connection makes for an even sturdier panel joint.
  • Controlled drainage
  • Running and guide rails built into the system
  • Separate levels for runners and locks
  • Accessible and living-space & floor tracks also available
  • Built-in, concealed cable routing

Combiline Bi-folding Door Features

  • An angular aluminium cover is mounted on the outside of the wood panel. The sub-frame comprises a static aluminium structure (mitre joint) that is faced with solid-wood beams on the inside of the frame
  • Slim sight line of 143 mm in panel joint

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

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


  • No protruding running tracks or guide rails
  • Fittings with one-hand operation in the break profile built into the wooden beam
  • With optional built-in TwinX® 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 track roller 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
  • Passdoor 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


  • Sustainable manufacturing
  • FSC® (Forest Stewardship Council), COC (Chain Of Custody)
  • PEFC (Programme for the Endorsement of Forest Certification Schemes)
  • Certified disposal in accordance with DIN EN ISO 14001:2009


  • In-house production control
  • Tested in accordance with DIN EN 1090, design class EXC 1 & EXC 2, certified in accordance with DIN ISO 9001

Find out more about the Combiline bi-folding door on the Solarlux website here.

Solarlux World Of Colours

Solarlux products are available in any RAL colour. The stand colour palette includes around 30 RAL colours in both matt and gloss finishes at no extra cost.

RAL 1015

RAL 3011

RAL 5003

RAL 5008

RAL 5014

RAL 6005

RAL 6009

RAL 7004

RAL 7006

RAL 7015

RAL 7016

RAL 7021

RAL 7024

RAL 7035

RAL 7038

RAL 7039

RAL 7040

RAL 8017

RAL 8019

RAL 8022

RAL 8077

RAL 9001

RAL 9003

RAL 9004

RAL 9005

RAL 9006

RAL 9007

RAL 9010

RAL 9011

RAL 9016

Solarlux World Of Wood Finishes

In addition to our painted options, Solarlux Woodline and Combiline products are available in a wide range of varnish shades and oiled finishes. Both options are available in varying shades of gloss, at no additional cost.

Spruce Afromosia Finish Image

Spruce Afromosia

Spruce Teak Finish Image

Spruce Teak

Spruce Pine Finish Image

Spruce Pine

Spruce Pure Pine Finish Image

Spruce Pure Pine

Spruce Cherry Tree Finish Image

Spruce Cherry Tree

Spruce Dark Teak Finish Image

Spruce Dark Teak

Spruce Nussbaum Finish Image

Spruce Nussbaum

Spruce Afzelia Finish Image

Spruce Afzelia

Spruce Bright Oak Finish Image

Spruce Bright Oak

Spruce Noble Brown Finish Image

Spruce Noble Brown

Spruce Dark Palisander Finish Image

Spruce Dark Palisander

Spruce Clear Finish Image

Spruce Clear

Oak Clear Finish Image

Oak Clear

Spruce Natural Finish Image

Spruce Natural

Oak Natural Finish Image

Oak Natural

Spruce Clear Dull Matt Finish Image

Spruce Clear Dull Matt

Oak Clear Dull Matt Finish Image

Oak Clear Dull Matt

Spruce Clear Matt Finish Image

Spruce Clear Matt

Oak Clear Matt Finish Image

Oak Clear Matt

Spruce Milk White Finish Image

Spruce Milk White

Spruce Scandinavian Grey Finish Image

Spruce Scandinavian Grey

Spruce Milano Grey Finish Image

Spruce Milano Grey

Spruce Nutshell Finish Image

Spruce Nutshell

Spruce Italian Teak Finish Image

Spruce Italian Teak

Spruce Walnut Finish Image

Spruce Walnut

Spruce Nordic Grey Finish Image

Spruce Nordic Grey

Spruce Milano Grey 50% Finish Image

Spruce Milano Grey 50%

Spruce Nordic Grey 50% Finish Image

Spruce Nordic Grey 50%

Spruce Clear Oiled Finish Image

Spruce Clear Oiled

Larch Clear Oiled Finish Image

Larch Clear Oiled

Oak Clear Oiled Finish Image

Oak Clear Oiled

Spruce Toffee Finish Image

Spruce Toffee

Spruce Light Grey Finish Image

Spruce Light Grey

Spruce Stone Grey Finish Image

Spruce Stone Grey

Spruce Dark Peat Finish Image

Spruce Dark Peat

Pine Walnut Glossy Finish Image

Pine Walnut Glossy

Pine Walnut Silk Matt Finish Image

Pine Walnut Silk Matt

Meranti Walnut Glossy Finish Image

Meranti Walnut Glossy

Meranti Walnut Silk Matt Finish Image

Meranti Walnut Silk Matt

What Our Clients Say

See All Testimonials

Mr Hewitt, United Kingdom

When ordering the windows, we made numerous changes along the way. They were very quick to update the order and help with questions along the way. Their installation team was good and were able to overcome a few quirks in our existing house. I was doing the following on decoration works after the windows were fitted. A couple of aspects made it difficult to finish up around the newly installed windows. Shims and metal plates were left in need of grinding back in order to get a plasterboard back up against the window internally. This was perhaps inevitable however, due to the old Victorian check reveals in the brickwork and some very out of square existing openings. On the whole we are very pleased.

Lars, Isle of Wight

Choosing Westcott as the installer for our VELFAC windows has been one of the best decisions in our whole build process. Always professional, with attention to detail, friendly, working to a very high standard and providing an outstanding customer service.

Kandy, Alton

Your communication was excellent and your team reliable and happy to go the extra mile to provide customer satisfaction. The windows look terrific and your team were very impressive. We do not hesitate in recommending Westcott Construction.

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