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The Internorm AT 540 – Where First Impressions Last
Bold, minimal, and beautifully engineered – the Internorm AT 540 aluminium front door is designed for those who understand that the entrance to a home sets the tone for everything behind it.
- Features
- Colours
- Options
- Specifications
- Downloads
Features
Precision Design. Uncompromising Performance.
The AT 540 has been designed for those who want their front door to work as hard as it looks good. From its flush profile to its multi-point locking system, every feature has been considered with purpose.
Completely Flush Design, Inside and Out
The AT 540 offers a clean, uninterrupted profile on both faces – a truly flush aesthetic that integrates seamlessly into modern façades and architectural glazing schemes.Concealed Hinges as Standard
Standard concealed hinges preserve the door's clean, unbroken design lines – removing any visual interruption and ensuring the overall aesthetic remains exactly as intended.Dual-Chamber Insulated Core
A dual-chamber construction with an insulated foam core delivers exceptional thermal stability, achieving Ud values of up to 0.75 W/m²K – keeping your home comfortable and your heating bills in check.Multi-Point Locking, Up to RC2 Security
The AT 540 includes multi-point locking as standard, with security rated to RC2 – a robust and thoroughly tested level of protection that gives both homeowners and specifiers real confidence.Up to 35 dB Sound Insulation
Designed to create a peaceful interior, the AT 540's sound insulation performance is a significant step above a standard front door – reducing external noise to a quiet, comfortable background level.Optional I-tec Open Smart Access
With the optional I-tec Open integration, the AT 540 can support keyless entry and smart access control – a thoughtful addition for modern homes that embrace the very latest in home technology.Colours
Make Your Entrance Unmistakably Yours
The AT 540 is available in a wide range of aluminium colour finishes – from striking anthracite and bold midnight tones to refined warm neutrals and crisp whites. Because the front door is the first thing people see, choosing the right finish matters. Camel's team will work with you to find a colour that reflects your home's character and your own sense of style. Visit us at any of our showrooms to see the range and explore what's possible.
Standard
HM113
M916
HM907
HM906
HM819
HM817
HM803
HM739
HM735
HM722
HM721
HM716
HM712
HM704
HM605
HM304
Internal
FI500
FI512
FI510
FI505
FI503
FI501
Options
Specified to Suit Your Architecture
The AT 540 can be tailored to the precise requirements of your project. With a construction depth of 93mm and a sleek minimalist profile, it sits beautifully within contemporary new builds, architect-designed self-builds, and high-end renovations alike. Optional I-tec Open smart access control adds a modern, keyless dimension to the door – ideal for clients who want the very best of both performance and technology integrated seamlessly into their home.
Specifications
Specification Detail for Every Project
The AT 540 is manufactured to Internorm's exacting standards of quality and performance. Full specifications are provided below:
Specification
Material
Design
Thermal Insulation (Ud)
Sound Reduction
Security Rating
Locking
Hinge
Construction Depth
Core Insulation
Smart Access Option
Detail
Aluminium
Completely flush — inside and outside
Up to 0.75 W/m²K
Up to 35 dB
Up to RC2
Multi-point locking
Standard concealed door hinge
93 mm
Dual-chamber with insulated foam core
I-tec Open (optional)
Downloads
Technical Downloads for Architects & Specifiers
Download AT 540 section drawings, performance data sheets, and technical documentation below. Our team is on hand to support your project specification at any stage.
A Front Door That Sets the Standard
The AT 540 isn't simply a door – it's an architectural statement. With its fully flush profile, concealed hinges, and minimal sightlines, it speaks a language of quiet confidence that complements the very best in contemporary design. For homeowners building or renovating to a high standard, it's a natural and considered choice.
Camel's team understands that every detail of a home matters – and your front door perhaps more than most. We'll work with you to specify your AT 540 exactly as you want it, from colour and finish through to glazing and smart access options, ensuring the result is as personal as it is impressive.
Camel & Internorm – A Partnership Built on Excellence
Camel is proud to be an authorised Internorm distribution partner, bringing these exceptional door systems to homeowners, architects, and builders across Cornwall and North Devon. It's a partnership grounded in shared values: precision, performance, and a genuine commitment to quality at every stage.
Whether you're specifying the AT 540 for a coastal new build, an architect-designed renovation, or a high-specification self-build project, Camel's expert team will support you from initial consultation through to final installation. Free site surveys are included with all supply and fit orders, and our showrooms in Wadebridge, Redruth, Holsworthy, and Barnstaple are open to help you experience these products in person.
Frequently Asked Questions
Considering the AT 540 for your home or project? Here are the answers to the questions we're most often asked about this Internorm door system – and our team is always happy to discuss your specific requirements.
What makes the AT 540 suitable for modern architecture?
The AT 540 features a completely flush profile, concealed hinges, and a 93mm construction depth – making it ideal for clean, contemporary façades and minimalist architectural schemes.
What security level does the AT 540 offer?
The AT 540 includes multi-point locking as standard and is rated up to RC2 – a robust, tested security classification that exceeds standard residential door requirements.
What is I-tec Open and do I need it?
I-tec Open is Internorm's optional smart access integration, enabling keyless entry and digital access control. It's ideal for clients who want the convenience of modern home technology.
Is the AT 540 energy efficient?
Yes – with Ud values of up to 0.75 W/m²K and a dual-chamber insulated foam core, the AT 540 contributes meaningfully to the thermal performance and energy efficiency of your home.
Can Camel supply and install the AT 540 in Cornwall or Devon?
Absolutely. We supply and fit across Cornwall and North Devon, with a free site survey included for every supply and fit order. Contact us to begin your project consultation.
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