
SL 45 bi-folding door
One section of the panel opens inwards, the other outwards
What makes the SL 45 non-insulated bi-folding door truly special is its range of different opening options: one section of the panel opens inwards, the other outwards. An optional turn-and-tilt panel can be included in the system to make ventilation easier.
Two seal levels provide optimum insulation against the wind and rain - the perfect shelter for any patio or balcony. The built-in Solarlux convenience lock with handle, bolt-catch lock with profile cylinder, and locking bolt guarantees a high level of anti-burglary protection.
Dimensions and build
- System type
- Non-insulated bi-folding door
- Material
- Aluminium
- Thermal break
- None — non-insulated
- Height adjustment
- Up to 8 mm after installation
- Locking stroke
- 24 mm into top and bottom frame profiles
- Floor track
- Flush floor track without rebate for accessible living
Glass, seals and build
- Slender frame and panel profiles for large glass areas
- Double all-round seal: vertical double EPDM seals, horizontal double brush seals with PE baulk
- Running and floor tracks without rebates

Performance figures
Certified performance figures for this system. Data sheets, CAD details and test certificates are available on request.
- Water tightness
- Up to 4A
- Sound reduction index
- R'w up to 25 dB
- Thermal transmission coefficient
- Non-insulated
- Air permeability
- 2
How this system is put together
The individual components and details that decide how a system performs over years of use.
Inward and outward sections
- One section of the panel opens inwards while the other opens outwards
- Optional turn-and-tilt panel can be built in for easier ventilation
- The same system suits domestic and commercial openings
Concealed carriage
- Double-paired running wheels on sealed bearings
- Independent axles for each running mechanism
- Slides easily and quietly across wide spans
Solarlux convenience lock
- Built-in lock with handle, bolt-latch lock with profile cylinder and locking bolt
- Maximum burglar resistance for a non-insulated system
- Plus special gears with a 24 mm stroke into the top and bottom frame profiles
Adjustment and accessibility
- Panel width adjustable with a screwdriver after installation
- Height adjustable up to 8 mm to compensate for structural sagging
- Flush floor track without rebate gives a threshold-free opening
What this system gives you
- Multiple uses both for the home and commercial buildings
- Optional turn-and-tilt panel for easier ventilation
- Two seal levels against wind and rain
What you can specify
Security & certification
- Built-in Solarlux convenience lock with handle, bolt-latch lock with profile cylinder and locking bolt
- Special gears with a 24 mm locking stroke into the frame profiles
- Two sealing levels against wind and rain
Options
- Inward and outward opening sections in one panel
- Optional turn-and-tilt panel for ventilation
- Flush or rebated floor track
Finishes & materials
- Aluminium with around 30 RAL colours as standard, matt and gloss
- Dual-colour finishes available
System details designed to impress
Mixed opening directions
One section opens inwards while the other opens outwards, for maximum flexibility.
Optional turn-and-tilt panel
Easier day-to-day ventilation without opening the whole wall.
Two seal levels
Optimum insulation against wind and rain for any patio or balcony.
More Bi-folding doors
View allSL 45 questions
The figures and the practical points behind the SL 45, answered as our team would answer them.
Talk to our team
Tell us about the opening, the room or the building. Whether you are a homeowner, contractor or architect, we will shape a system around your project and guide you from first specification to final installation.
- 01
- Tell us about the project
The opening, the room, the building and the look you are after.
- 02
- We review the details
A specialist checks dimensions, performance needs and feasibility.
- 03
- You receive a proposal
Specification, drawings and a quote, with installation planned end to end.


