Back to products

  • Truframe door

    Endurance Solid Timber Composite Doors 🔍

  • front door

    Endurance Unrivalled Inner Strength 🔍

  • truframe door

    Endurance Modern Style Composite 🔍

  • Truframe door

    Endurance Traditional Style Composite 🔍

  • Brochure

    Have a look at our beautiful brochure...

  • Security

    ATK Lock

    Our Endurance® door comes with the very best cylinder lock on the market - Avocet ATK - as standard!

    This ultra-secure lock has many features that help keep your home from being broken into...

    Avocet ATK is safe from snapping

    Lock-snapping is the most widespread method of gaining access into a property through a door, due to it being an easy skill to learn and requiring nothing more than a set of mole-grips. A lock snapping attack can be accomplished in less than 10 seconds, whilst making only slightly more noise than it takes to operate the lock with a key. For this reason, lock-snapping is a fast growing epidemic, with Police estimates suggesting that over 22 million doors in the UK are at risk*.

    There are several anti-snap cylinder locks on the market, achieving anything from TS007 1-star to 3-star accreditations, which promise to protect from this form of attack, however Avocets’s method of resistance with the ATK is truly unique. As well as housing two sacrificial sections, if an attacker manages to snap the second section then the cylinder’s ‘Lockdown Mode’ is activated. When this happens, a firing pin shoots into the central cam and is held in place with a retaining pin. This locks the central cam, made from a high strength molybdenum alloy, making the lock resistant to even the most aggressive of attacks - even with the key still left on the inside!

    After the attack, your home is still secure from the outside, yet fully operational from the inside with the key.

    Avocet ATK beats bumping and picking

    An intruder may try and get in your home by using a special ‘bump key’. Even quicker than snapping, all the attacker needs to do is insert the bump key into the cylinder and tap it with a hammer to get the locking pins to sit above the shear line, which then allows the key to turn. With the wrong lock it is as quick and simple as that, but inside the ATK there are special bump-resistant pins nestled deep inside every cylinder, which are specifically designed not to respond to a bump key.

    Avocet ATK defeats drilling

    Both ends of every Avocet ATK cylinder have hardened steel anti-drill plates and pins built-in. The plates protect the lock from a drill attack through the key slot, whilst the 6 pins prevent an intruder from getting to the working mechanism at the bottom of the lock. Avocet ATK has still got you protected even if the sacrificial outer face of the lock is snapped first, as 5 of the 10 anti-drill pins are positioned behind the first snap-off section. This ensures your home and family remain safe regardless of the intruder’s level of skill or persistence.


    The Avocet ATK is accredited by Master Locksmith Association with their highest rating - SS312 Sold Secure Diamond, TS007 3-star rating, British Kitemark and Secured by Design accreditations.

    • SS312 Sold Secure Diamond Grade
    • 3 Star British Kitemark - TS007:2014 (KM 586153)
    • Secured by Design Accredited (Police preferred specification)
    • Patented Snap Secure Technology
    • Pick, Drill & Bump Resistant
    • 6 Trap Pins for advance pick resistance
    • 10 Anti-drill pins
    • Unique "Click Secure" thumbturn design
    • Double, and thumbturn formats available
    • Three keys per cylinder
    • Keyed alike key/key pairs are available ex stock
    • Master keying on request


  • Tech Spec

    Technical Specifications

    Endurance® doors are tested and classified for their resistance to loading and impacts. This also includes durability to repeated opening, closing and unlocking cycles which is typically 50,000 times on a single door set.

    • 48mm thick cross laminated (LVL) timber door leaf which provides exceptional strength and stability, especially when compared to standard composite doors
    • Tough through colour thermoplastic door skins – no painting or varnishing
    • 30mm thick double and triple glazed units manufactured to BSEN1279
    • A Cassette glazing system which has been independently security tested
    • 3 door hinges designed to meet PAS 24: 2012 requirements.
    • Door handles have been salt spray tested to 480 hours BS EN 1670, tested to 200,000 cycles and have achieved the PAS24 security test as part of a complete door set
    • Nickel plated hooks, dead bolt and multi-point security systems that are tested to the Secured By Design specification PAS 24 security standard.
    • 6 pin euro cylinder with sacrificial cut and optional upgrade. The cylinder is anti-pick and anti-bump
    • Letter plate features secure through fixing so they can only be removed from the inside of the house. Letterbox conforms to the European standard EN 13724:2002 and has been salt spray tested to 480 hours BS EN1670: Class 5, as well as Flap cycle tested to 20,000 cycles.
    • Heavy duty steel keeps
    • Detailed embossed wood-grain texture skins – combining traditional looks with modern technology
    • Optional low aluminium thresholds for ease of access for wheelchairs and prams. Part M compliant with Building Regulations
    • Fully sealed door leaf with uPVC edge band detail
    • Weather protection drip rail



    Endurance® doors have been subjected to number of controlled security tests. They have achieved the following accreditations:

    • BS 6375-1:2009 classification for weather tightness
    • BS 6375-2:2009 classification for operation and strength characteristics
    • BS EN ISO 10077-1:2006 classification for thermal performance of doors
    • PAS24:2012 classification for enhanced security for key/key operation
    • PAS24:2013 classification for enhance security for key/ thumb turn operation
    • BS EN 1634-1:2008 classification for 30 minute fire integrity
    • BS 476: PART 22:1987 – Assessed for 30 minute fire integrity/firedoor coupled to side light or top light
    • BS 6375-1:2009 classification for weather tightness
    • Secured By Design accredited


    Secured by Design

    Secured By Design is the official UK Police flagship initiative supporting the principles of ‘designing out crime’. The Endurance® door range has been designed, tested and achieved the standard. The Secured By Design standard upgrade includes - Avocet ATK high security cylinder, cylinder guard and laminated glass. In order to comply with Secured By Design, the Endurance® door must be tested to PAS 24 2012. PAS 24 2012 Enhanced Security Testing Standard produced by BSI.

    The standard involves the following tests:

    • A manual attack on the locking hardware with tools including a crow bar and mole grips.
    • Unlimited number of 3 minute attacks on the door cylinder using a range of tools such as craft knives and screw drivers.
    • 3 minute manual attack using chisels and brick bolsters to gain entry through the door.
    • Hard body impact test – impacts are applied to the door leaf at hinge points and locking points using a 50kg steel impactor. 
    • The hinges are designed to meet the requirements of PAS 24:2012 as part of a compliant door system and BS 6375. Security of the pin is achieved by a concealed grub screw, which prevents unauthorised lift off on outward opening Endurance® doors. 
    • Each Endurance® door is glazed with 4mm toughened safety glass double or triple glazed dependent on the glass design to BSEN1279. The sealed unit is secured into the Endurance® door using a cassette glazing system that has been independently tested and approved to the PAS 23/24 standards. 
  • Endurance Door Builder

    Choosing a solid, secure and stylish door has never been so easy with the TruFrame Endurance Door Designer. Choose your door type, frame shape, door style, colours, glass and hardware! See your chosen door on your own property, download a PDF of the design and spec, plus then let us put you in touch with one of our trusted approved installers.


    Try the TruFrame Endurance Door Builder now!