Aluminium - SF55 & SF75

Aluminium bifold doors - SF55 & SF75

BSI Kitemark | 643635PAS 24: 2016 certifiedSecured by Design logo

SUNFLEX aluminium bifold doors lead the way in innovation and design, setting the standards for other companies to follow. Rather than emphasising on only one or two elements that make the SUNFLEX doors stand out, there are countless features that make the SF55 and SF75 head and shoulders above the rest. German design and manufacture, slim sight lines, contemporary, square edged profiles throughout and colour matched furniture in line with the frame make SUNFLEX doors the best looking on the market. Choose between our award-winning SF55 and SF75 - the only German made system with a BSI Kitemark certificate - the perfect combination.

Aluminium is an ideal material as it’s light, strong and stable with slim profile sections to minimise the visible framework and maximise the glass area. Gain reassurance in the most exposed locations with this virtually maintenance free material.

SF55

  • SUNFLEX SF55 - Build It Awards Winner 2015The SF55 slimline frame is an award winning door – winning the Build It magazine award for ‘Best Glazed Door’.
  • 55mm front to back creating a wider opening than other bifold doors.
  • Maximise your opening with the incredibly slim and neatest stack of bifold doors on the market.
  • This system accommodates a glazing unit of 24mm, 28mm, 30mm or 36mm.

Integrated ventilation option with a full height tilt and turn window within the bifold doors. This enables generous ventilation without having to open the doors and also offers another exit point at the opposite end to where the doors open. 

Double glazed 1.0W/m2K centre pane U-Value = Overall frame and glass 1.6W/m2K.

Triple glazed 0.7W/m2K centre pane U-Value = Overall frame and glass 1.3W/m2K.

Maximise your opening with panel widths up to 1200mm and 3500mm maximum panel height for narrower panels. A sliding post can be introduced at the running carriage position to offer greater balance to the doors in extreme situations. 

Acoustic performance tested at Rw=36dB. Further upgrades available.

Choice of 3 thresholds

Weathered track with double rebates offering peace of mind even in the most exposed of locations. One of the only bifold doors that can offer a double rebates on the bottom track which is why we achieve enviable weather test results ensuring that the outside is kept outside. On outward opening doors the internal finished floor can be level with the top of the track and then the step down to the outside can be as small as 3cm.

Low level track with single rebate low level Doc M compliant track recessed in to the floor with a single rebate. The floor on the inside and outside can be at the same level with the track in the middle sloping up only 14mm. This provides a single rebate for the doors to close tight against which is more weather tight than the flush track.

Non weathered flush track, Doc M compliant track recessed in to the floor with no rebates. Using a twin brush pile and a nylon strip for a virtually seamless connection between inside and outside. Whilst this is a very subtle detail it is recommended for a sheltered area only as there is not a continuous seal and reduces the weather rating with no guarantee against wind and water ingress which is a compromise for this contemporary look. A slope away or drainage channel is then recommended on the outside to prevent any water ever pooling up against this track.

A sill section with varying projection options can be used below any of these tracks. Please see downloads for the section details.

SF75

  • Advanced thermal efficiency with a 44mm multi-chambered thermal break keeping heat inside your room.
  • Save money on heating bills and make your room feel warmer maintaining the incredibly slim 115mm sight line.
  • Nobody else offers a bifold door with this combination of weather protection, thermal efficiency and slim sight lines.
  • This system accommodates a glazing unit of 24mm, 28mm, 30mm or 48mm. Even with triple glazing, integrated Venetian blinds within the glass are still an option.

Double glazed 1.0W/m2K centre pane U-Value = Overall frame and glass 1.4W/m2K.

Triple glazed 0.5W/m2K centre pane U-Value = Overall frame and glass 0.9W/m2K.

Maximise your opening with panel widths up to 1100mm, maximum panel height for narrower panels 3500mm. A sliding post can be introduced at the running carriage position to offer greater balance to the doors in extreme situations. 

Acoustic performance tested at Rw=36dB. Further upgrades available.

Choice of 2 thresholds

Weathered track with double rebates offering peace of mind even in the most exposed locations. One of the only bifold doors that can offer a double rebate on the bottom track which is why we achieve enviable weather test results ensuring that the outside is kept outside. On outward opening doors the internal finished floor can be level with the top of the track and then the step down to the outside can be as small as 3cm.

Low level track with single rebate low level Doc M compliant track recessed in to the floor with a single rebate. The floor on the inside and outside can be at the same level with the track in the middle sloping up only 14mm. This provides a single rebate for the doors to close tight against which is more weather tight than the flush track.

A sill section with varying projection options can be used below any of these tracks. Please see downloads for the section details.

Both of these systems feature all the below features and benefits:

  • When panels are closed together the sightline is only 115mm maximising your view and the light in to your home.
  • Modern slimline square edged profiles throughout. No external rounded or chamfered profiles. Our casement windows and sliding doors offer the same square edged design for a uniformed look to your property.
  • All handles are finished in-line with the door frame providing an uninterrupted view through the glass. Alternatively a horizontal handle with a latch can be requested for a more traditional operation.
  • Framework is assembled with patented moulded internal corner blocks and machine mitred at the corners rather than the cheaper butt jointed alternatives.
  • Officially tested to ensure they really do keep bad weather outside.
  • One of the most weather tight aluminium systems available on the market with 900Pa water tightness (Class 9A) and 600Pa BS EN 12207 air permeability (Class 4) with our standard weathered track.
  • Resistance to wind load 1,600Pa (Class A4).
  • A good U-Value does not mean a door keeps out the wind and the rain. Make sure you check out a doors weather test results before you buy.
  • EPDM black gasket around the door which is an extremely durable synthetic rubber. We feel that a long life weather tight seal is more important than offering a colour matched inferior.
  • Double rebated top and bottom tracks offering a tight compressed seal.
  • Awarded Secured by Design accreditation. Designed and manufactured and installed to police preferred specification.
  • Multipoint locking system, comprising of hidden top and bottom shootbolt locking with additional side locking point on lead door panels. 
  • Five-lever Euro profile cylinder complying to British Insurance Standards and BS3621.
  • Internally glazed as standard preventing the glass being easily removed from the outside.
  • Hinge pins secured by internal grub screws ensuring panels cannot be separated.
  • Slim 8mm gasket between panels so nothing substantial can be levered between the panels.
  • If not required ask for no key lock to the outside of the doors. Offers the doors a cleaner look externally and less opportunity for any potential burglar.
  • Unique to SUNFLEX the top and bottom shootbolt locking can be doubled with our twin lock upgraded. The locking system of one panel is internally linked to the adjacent panel providing four locking bolts rather than two. This upgrade is not available with any other manufactures’ folding door.
  • Toughened safety glass would be used as standard making this hard to smash but this can be upgraded to laminated security glass.
  • Tolerance built in to cope with material expansion and contraction when installed to south facing elevations and for marginal lintel deflections
  • Join two elevations together with our moveable posts of 90° or 135°. If you can hold up the roof above with either cantilevered steel or an internal or external pillar we can join the folding doors together at the corner
  • Create a unique look to your property with faceted/curved sets up to 10° between panels
  • 2500mm2 or 5000mm2 colour matched trickle vents can be incorporated within a 35mm add on section above the top track
  • Vertical and horizontal midrails to divide the glass or plant on bars stuck on the glass for a more traditional look
  • A bottom running system with a four wheel running carriage manufactured from tough glass fibre reinforced polyamide set around a maintenance free sealed ball-bearing. Upon installation the fitter easily adjusts this with an Allen key for optimising the smooth operation
  • Can have timber clad on the inside (SF55c and SF75c) for the warmth of a natural product internally whilst retaining the maintenance free aluminium exterior.
  • Panel catch - Unique to SUNFLEX bifold doors our locking black PVC panel catch is provided when there is an odd number of panels folding in one direction. This holds the single access door on to the next panel and when all the doors are stacked open the special design prevents the single door being detached from the next door for peace of mind in windy conditions. Also prevents unwanted use and promotes correct operation of the doors providing the correct counter weight for effortless operation.
  • Stacking clip - Unique to SUNFLEX bifold doors our stacking clip, hidden in the top track, holds the doors open to ensure that the maximum opening is achieved, the doors do not start to close in the wind and helps prevents unwanted use by small children. 
  • Finger cushioning gasket situated on the edge of each door. This double gasket seal provides a cushioning effect if fingers were to be trapped. Making these doors safer than conventional, internal, single wooden doors that do not come with finger cushioning gasket. 
  • Five standard frame colours, Silver Anodised EV1, or in semi-gloss: Anthracite Grey RAL 7016, Grey Aluminium RAL 9007, White Aluminium RAL 9006, Traffic White RAL 9016.
    Standard aluminium bi-folding door finishes - Silver Anodised and WhiteStandard aluminium bi-folding door finishes - Aluminium and Grey AluminiumStandard aluminium bi-folding door finishes - Anthracite Grey
  • Choose from over 200 frame colours available including brushed steel, textured, woodgrain and extreme marine protection.
  • Handles are designed to almost disappear when colour matched to the frame or can be made a feature in stainless steel. Plastic D handle used at the hinge to pull the doors closed.
  • Subtle hinges are in line with the black gasket of the doors making the standard black hinge a popular choice. Alternatively these can be colour coded to the frame or stainless steel.
  • Opt for a different colour outside to inside matching the design of your room and the external character of the property.
  • For powder coated aluminium we recommend a marine treatment if you are within 5,000 metres of the coast or around a swimming pool/chemical environment. We pre-anodise the aluminium frames making them porous and then quickly after this the frames are powder coated which is absorbed in to the frame. This ensures excellent adhesion of the paint to the aluminium and along with a cleaning regime is the best possible protection for powder coated aluminium doors in this environment. Not many companies offer pre-anodising as a marine finish. Alternatively we can provide the frames in a silver anodised finish as standard which does not have a painted surface and does not need the marine treatment.

Hotspots

SF55
Burglar-resistant fittings

Burglar-resistant fittings

Assembly shoes

Assembly shoes allow a fast assembly and precise adjustment of the vertical frame profiles

PAS 24:2012

PAS 24:2012 certified security standard

Height adjustment

Height adjustment of the running mechanisms possible 

Optional twin-lock-mechanism

Optional twin-lock-mechanism 

Panel catcher

Panel catcher for additional security to fix the pass door to the adjacent panel

Mushroom-head lock

Mushroom-head lock for optimal tightness and increased security

Options from Sunflex handle series

Options from Sunflex handle series

Different kinds of locks available

Different kinds of locks available

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