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Composite Door Security: Features, Certifications, and What to Look For

August 13, 2025
7 min read

When it comes to your home, security is a non-negotiable. Your front door is the first line of defence against intruders, so choosing a secure, robust solution is absolutely essential. That’s why more and more homeowners are turning to composite doors, which have become the gold standard for modern home security. By blending cutting-edge materials and advanced manufacturing technology with stylish design, composite doors offer superior protection without compromising on appearance.

Understanding exactly what makes a composite door so secure can help you make an informed choice and give you greater confidence in your investment. In this comprehensive guide, we’ll explore everything you need to know about composite door security, from key security features and locking mechanisms to essential certifications and industry standards. And if you have questions about specific security features or want expert advice on the best options for your home, the experienced team at PH Composite Doors is always here to help you choose the safest, most reliable solution.

What Makes Composite Doors So Secure?

Composite doors are engineered from a blend of materials, usually uPVC, solid timber, insulating foam, and glass-reinforced plastic (GRP). This layered construction delivers a door that is strong, rigid, and incredibly difficult to break through.

Key Security Benefits of Composite Doors

  • Strength: Multi-layered core construction provides superior resistance to forced entry.
  • Durability: GRP skin is tough and resists impacts, scratching, and weathering.
  • No Weak Points: Composite doors eliminate vulnerabilities common in older timber or single-material doors.

Essential Security Features in Composite Doors

1. Multi-Point Locking Systems

Modern composite doors typically feature high-security, multi-point locking systems. These locks engage at several points along the door frame, usually three or five, making it almost impossible to force the door open by levering or kicking.

Types of multi-point locks:

  • Hook bolts
  • Deadbolts
  • Roller cams
  • Shoot bolts (top and bottom)

2. Anti-Snap, Anti-Bump, Anti-Pick Cylinders

Cylinder locks are a frequent target for burglars, especially via snapping or bumping attacks. The best composite doors use advanced Euro cylinders designed to resist these techniques.

Look for:

  • Anti-snap cylinders (designed to break in a way that still prevents access)
  • Anti-bump and anti-pick features
  • Cylinders with British Standard TS007 3-star or Sold Secure Diamond accreditation

3. Robust Hinges and Hinge Bolts

High-security hinges are reinforced and protected by hinge bolts, making it extremely difficult to force the door open from the hinge side, even if the hinges are exposed.

4. Steel-Reinforced Frames

The strength of a door is only as good as its frame. Composite doors are usually installed with steel-reinforced uPVC or aluminium frames for maximum resistance against attacks.

5. Security Glazing

If your composite door includes glass panels, these are made from toughened or laminated glass, which is far harder to break than standard glazing. Double or triple glazed panels are often standard, sometimes with inner films to prevent shattering.

6. Secure Door Furniture

Handles, letter plates, and knockers on quality composite doors are anti-tamper and often have internal protection to prevent fishing (where tools are inserted to retrieve keys).

Recognised Security Certifications for Composite Doors

When choosing a composite door, look for independently verified security certifications that prove the door meets rigorous testing standards. Here are the main accreditations to consider:

1. PAS 24: Enhanced Security Performance

PAS 24 is the British standard for door security. Doors and locks must pass a series of physical attack tests, including attempts to break or manipulate the locks, hinges, and glazing.

What PAS 24 means for you:

  • Assurance the door has been tested against common intruder techniques
  • Required for all new-build homes in the UK under Building Regulations

2. Secured by Design (SBD)

Secured by Design is the official UK Police initiative aimed at improving the security of buildings. Products with this accreditation are independently tested and proven to reduce burglary risk.

Key points:

  • SBD doors meet or exceed PAS 24 and other tough criteria
  • Many insurers favour homes with SBD-accredited doors and windows

3. BSI Kitemark

The British Standards Institution (BSI) Kitemark symbol signifies rigorous testing and quality assurance. For doors, it covers resistance to physical attacks, weathering, and manufacturing standards.

4. TS007:2014 (Euro Cylinder Standard)

This standard is specifically for lock cylinders, providing star ratings based on their resistance to snapping and picking.

  • 3-star rating: The highest level; offers excellent protection from attack.
  • Look for locks with the Kitemark and a 3-star TS007 rating for maximum reassurance.

5. Sold Secure Diamond

This is an independent certification focusing on lock cylinders, tested against advanced forced entry methods. It’s one of the highest endorsements for domestic locks.

How Composite Doors Are Tested for Security

To receive these accreditations, composite doors are subjected to a series of rigorous laboratory tests, including:

  • Manual attack tests: Simulate common burglary techniques using tools like crowbars and screwdrivers.
  • Mechanical impact tests: Assess the door’s resistance to being kicked, rammed, or impacted.
  • Lock manipulation tests: Test resistance to picking, bumping, or snapping locks.
  • Glazing penetration: Attempt to break or remove glazing units.

These tests ensure that certified doors stand up to real-world attacks and offer genuine security.

Additional Security Options for Composite Doors

For maximum peace of mind, consider adding these features to your composite door:

1. Smart Locks and Digital Access

Many composite doors can be upgraded with smart locking systems that allow keyless entry, remote locking, and integration with home security systems.

2. Door Chains and Viewers

While not essential, door chains and wide-angle viewers let you check who’s at your door without opening it fully.

3. Security Lighting

Positioning motion-activated lighting above your composite door can act as a powerful deterrent to intruders.

Installation Matters: Why Professional Fitting Is Crucial

Even the most secure composite door is only as good as its installation. Poorly fitted doors can have gaps or misalignments that undermine all security features.

Tips:

  • Always use an installer registered with a recognised scheme such as FENSA or CERTASS.
  • Ask for proof of security certifications for both the door and locks.
  • Ensure the frame is properly anchored into the wall.

Ongoing Security Maintenance

Security doesn’t end after installation. To keep your composite door performing at its best:

  • Regularly check and lubricate locks and hinges.
  • Inspect the door and frame for signs of damage or tampering.
  • Make sure all bolts and screws are tight.
  • Replace any worn weather seals or draught excluders to prevent forced entry points.

Invest in Security, Invest in Peace of Mind

Composite doors are the pinnacle of modern security, offering unrivalled strength, advanced locking systems, and independent certification that gives homeowners real peace of mind. When choosing your next front door, don’t settle for less than the best, selecting a high-quality composite door ensures you benefit from the latest innovations in security and durability. It’s just as important to insist on certified products, expert installation, and regular maintenance to keep your home safe for years to come.

For guidance on selecting the most secure composite doors, or to ensure your new door is fitted to the highest standards, you can always rely on the expertise of PH Composite Doors. Their experienced team can help you choose certified solutions and provide professional installation, so you can feel confident that your home is protected both now and in the future.

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With over 25 years of experience, PH Composite Doors specialises in supplying and fitting high-quality composite doors and uPVC windows across the North West. We’re trusted for our reliable service, expert installation, and honest advice.
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