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Aluminum NT45

Non-thermally Insulated Aluminum
Bi-fold Door System

Slim sight lines and a smaller stacking space, ideal for internal and some external* solutions.

10 Year Manufacturers Warranty

10 Product Warranty


The NT45 offers a lightweight solution and is ideal for use as an internal bi-fold door, room dividers, pool enclosures and garages as well as commercial and leisure applications (zoning areas etc).

The NT45 uses a non-thermally insulated profile so ordinarily it does not pass the strict building standards U-Value of 1.8 W/m2k which is required for an external door in the UK (for use in other non UK areas please check local building control legislation).

Although the slimline NT45 frame has a tighter stacking space and a lightweight feel compared to our standard products it doesn’t lose any of the benefits our standard frame offers.

Just as durable and strong and although used mainly for interior doors they are just as weather tight and secure.

The NT45 is custom made to your exacting requirements - meaning as a customer you get to specify; dimensions, product style, opening style, configuration, color, finish, hardware, thresholds, glass specification, glazing options, magnetic stops, ventilation and internal blinds.

A matching range of windows and doors are available to complement the NT45 bi-fold door.

NT45 profile drawing


Key Features
  • Available in any RAL, special color/texture, anodized color, or dual color option
  • Available with or without external cill
  • Buying direct from the manufacturer
  • Child friendly/fitted with finger safe gaskets
  • Choice of nine threshold (bottom track) options
  • Contemporary modern appearance
  • Dual running (top and bottom) rollers for even weight distribution
  • Easy to operate - effortlessly smooth
  • Finger safe gaskets - so no need to worry about fingers getting caught
  • Hard wearing powder coated finish/resistant to scratching and denting
  • Heavy duty corner connectors for increased strength, durability & rigidity
  • Ideal for internal applications
  • Inward and outward opening options
  • Low threshold - zero trip hazard / ADA compliant
  • Maintenance free, life expectancy of up to 25 years
  • Matching range of windows and doors available
  • Secure roller system, encapsulated within the track
  • Security hinges - non surface mounted
  • Slim flat handles for reduced stacking for when the doors are in use
  • Slim sightline of just 130mm (60/5/5/60) - 5 1/8” (2 3/8” / 3/16” / 3/16” / 2 3/8”)
  • Corner posts can be incorporated to produce corner openings
  • In-line out of sight track offering a practical functionality
  • Marine treatment available for salt water environments
  • Outlet Water escape
  • Pull handle(s), to enable ease of operation and easy closing
  • Resistant to scratching & denting
  • Robust hardware using our own ‘Fold N Slide’ hardware range
  • Steel wheels sealed bearings for maintenance free use
  • Structurally strong - built to last
  • Thicker, stronger aluminum profiles than most competitors


  • Five point multi-locking to access door with ‘Secured by Design’ (SBD) security cylinders
  • Three star diamond ABS TS007 euro cylinders (anti-snap, anti-pick, anti-bump, anti-drill)
  • Encapsulated rollers/running gear within the track, preventing it from being attacked
  • End panels and access doors are fitted with high security locking mechanisms
  • Hardened steel hook locks and dead bolts
  • Internally glazed/beaded (option to upgrade to laminated impact glass)
  • Option of key locking shoot-bolts are available for added security and external access
  • Passed tests equivalent to a 300lb man trying to force entry
  • Secure roller system, encapsulated within the track
  • Security hinges (non face fixed) to prevent the pins from being removed and the hinge being forced from the door
  • Shoot bolts - Top and bottom, locate directly into both top and bottom track
  • Stronger/thicker (1.75mm) aluminum profile

Threshold Options

We currently offer four threshold options for the NT45 bi-fold door, with all options available as either inward or outward opening. But for the many, the most popular option is our flush threshold that blends two rooms seamlessly, which is especially useful for those with children, elderly or wheel chair users.

This slimline inline out of sight track system (which runs both top and bottom) is strong, safe and secure with all rollers / moving parts concealed within the aluminum profile extrusion itself. The aluminum track is weather-rated and with the moving parts being encapsulated within the track, there is no danger of doors lifting or bouncing off.

NT45 threshold showing flush track option

Flush track
Threshold option

NT45 threshold showing flush track with cill option

Flush track with cill
Threshold option

NT45 threshold showing raised track option

Raised track
Threshold option

NT45 threshold showing raised track with cill option

Raised track with cill
Threshold option


  • High performance seals/gaskets
  • PVC Nitrile (synthetic rubber) gaskets, fitted as standard and used to seal the double glazed units into the panels and protect the door from water ingress
  • PVC Nitrile seals between each panel (including top and bottom of the panel) to prevent water, wind and noise from entering the property
  • Tested for water ingress, wind resistance and air permeability
  • Weather head drip bar - moulded top profile

The main properties of PVC Nitrile is its outstanding heat, acoustic and thermal resistances.

Thermal efficiency
  • Super Spacer® bars fitted as standard to glass units
  • U-Value of complete unit from 1.42-1.8 W/m2k


Frame width: 60mm / 2⅜in
Frame depth: 45mm / 1¾in
Maximum opening width: 18300mm / 60ft
Maximum opening height: 3000mm / 10ft
Panel height range (min/max): 305mm / 1ft - 3000mm / 10ft
Panel width range (min/max): 305mm / 1ft - 1100mm / 3ft 7 1/2in
Material: Aluminum (thermally insulated)
Stock colors: 9016 Traffic White (Satin)/9005 Jet Black (Matt)/7016 Anthracite Grey (Matt)
Optional colors: Any RAL color/dual color/anodized or special finish
U-Value of complete unit - W/m2k: 1.42 - 1.83
U-Value of center pane (Glass) - W/m2k: 0.92
U-Factor of complete unit - Btu/h·ft²·°F: N/A
Aluminum thickness: 1.75mm / 1/16in
Warranty (Product): Up to 10 years
Warranty (Manufacturers): 10 years
Glass units, standard: 28mm / 1 ⅛in double glazed, low-E tempered
Glass units, optional: Triple glazing, laminated, anti-sun tinting (grey, bronze, green and blue), turtle glass, krypton gas


NT45 General Arrangement Drawings
Adobe Acrobat · 1.2MB

Installation Services

We offer a range of installation services

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