Are Composite Doors Secure?
Written by Cornwall Composite DoorsReviewed by Cornwall Composite Doors installersLast updated July 20266 minute read
Short answer
Yes. A quality composite door with a multipoint lock, a TS007 3-star or 1-star-plus-cylinder combination, and a solid timber-core slab meets PAS 24:2022 security requirements and is significantly harder to force, snap or kick in than a standard timber or older uPVC door.
Security is usually the first question homeowners ask about composite doors, and rightly so. This article explains what actually makes a composite door secure, which standards to look for, and where cheaper doors fall short.
What makes a composite door strong
A composite door slab is built around a solid timber or high-density foam core, faced with GRP (glass-reinforced plastic) skins. This layered construction resists the kind of localised force that can crack a plain uPVC panel or split a timber stile, because the load spreads through the whole slab rather than concentrating at one weak point.
The strength of the slab is only half the story. A well-built door also needs a steel reinforced frame, correctly fitted hinges, and a lock mechanism engaged into a strike plate that is properly screwed into sound brickwork or timber, not just the uPVC frame outer.
The standards that actually matter
PAS 24:2022 is the UK test standard for door security, covering physical attack resistance including forced entry attempts with tools. Doors carrying Secured by Design accreditation have passed PAS 24 testing as part of a wider police-backed scheme that also checks glazing and hardware.
TS007 is a separate standard specifically for euro cylinder locks, rated with a star system. A 3-star cylinder alone, or a 1-star cylinder paired with 2-star security hardware, defeats snapping attacks. Ask your installer which combination your door will have before you order.
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Where budget doors cut corners
Not every composite door on the market is genuinely secure. Some budget ranges use thinner GRP skins, foam-only cores, or basic euro cylinders with no snap protection, while still marketing themselves as composite. The door can look identical to a premium one in a photograph.
The way to check is to ask for the specification sheet: core material, lock make and model, cylinder star rating, and whether the door has been independently tested to PAS 24. A reputable installer will have this information readily available and won't be cagey about it.
Coastal and rural Cornwall considerations
Cornwall has a mix of dense holiday-let terraces, isolated rural properties and coastal villages, and security priorities differ a little by location. Isolated properties benefit most from strong physical resistance since a break-in may go unnoticed longer, while terraced and town properties benefit from visible deterrents like door chains and viewers alongside the lock itself.
Frequently asked questions
Are composite doors more secure than uPVC doors?
Generally yes, because the solid core resists impact and drilling better than a hollow or foam-filled uPVC panel. However, security depends more on the lock and cylinder fitted than the slab material alone, so a well-specified uPVC door can outperform a poorly specified composite one.
Do all composite doors have multipoint locks?
Almost all modern composite doors are fitted with a multipoint locking system as standard, typically engaging at three to five points around the frame. The quality and type of mechanism varies between manufacturers, so it's worth confirming the specific hook, roller or deadbolt combination used.
What is Secured by Design and do I need it?
Secured by Design is a police-backed accreditation confirming a door and its hardware have passed PAS 24 and related testing. It isn't a legal requirement for homeowners, but it's a useful independent marker of genuine security if you want extra reassurance beyond the installer's word.
Can a composite door be insurance-approved?
Yes, most insurers accept composite doors fitted with a BS 3621 or PAS 24 compliant multipoint lock as meeting standard home insurance security requirements. Always check your specific policy wording, and keep your installation certificate and lock specification in case you need to prove compliance.
Explore next
More security advice
- Multi-Point Locking ExplainedA plain-English breakdown of how multipoint locks secure a composite door and what to check before you buy.
- Anti-Snap Locks ExplainedUnderstand lock snapping, why it became a common burglary method, and how anti-snap cylinders stop it.
- PAS 24 Composite Doors ExplainedPAS 24 is the UK's key door security test standard. Here's what it actually involves and why it's worth insisting on.
