Home > Companies > Internorm Windows UK Ltd > AT 400 Aluminium Entrance Door

High quality aluminium door range in a minimalist design. The doors offer the highest degree of thermal insulation and energy efficiency through coated, gas-filled quadruple glazing. They have a thermally broken aluminium system with a three chamber frame profile, fibre glass reinforced 35 mm polyamide rails, foamed insulating core and aluminium profiles on the inside. The special two-part door panel provides good heat insulation and the aluminium cover layer as well as two layers in-between ensure high stability. The doors are inward opening and have a smooth door leaf on both sides.

Related literature

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Standard product features


Aluminium extrusion press profiles.

Construction depth:

  • Profiles: 93 mm.
  • Sash: 90 mm.

Glazing thickness:

82 mm.

Technical properties:

  • Thermal insulation: Up to 0.75 W/m²K.
  • Sound protection: Up to 36 dB.


Special triple gasket construction with overlapping, high-quality elastic silicone gaskets.


Three dimensionally adjustable turn hinges.



Different styles are available to suit different applications with various viewing panel options; consult manufacturer's literature for more information.

Colour/ Finish:

A wide range of powder-coated or anodized surface options are available. Consult manufacturer's literature for more information.

NBS Specification

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This product is associated with the following NBS Create clause:
45-25-28/344 Metal doorsets

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Internorm Windows UK Ltd


+44 (0)20 8205 9991

Product reference

AT 400 Aluminium Entrance Door



Design style

[Home Pure]
[Home Soft]


[As drawing]
[As schedule]


[Not applicable]
[Fluted glass]
[Sandblasted glass]

Colour/ Finish

[ ______ ]


Five point - Two locking claws, two security bolts and one main locking bar.


[ ______ ]

Manufacturer details

Unit D,
Colindale Business Park,
2-10 Carlisle Road,
London, NW9 0HN
Tel +44 (0)20 8205 9991
Fax +44 (0)20 8905 8744
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