Composite vs UPVC Doors: What Actually Matters for Security

Door material is important — but most real-world security outcomes come down to:

• the lock cylinder quality
• correct installation
• frame strength
• door alignment (especially multi-point systems)

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Composite doors (general strengths)

• usually heavier and more rigid
• better resistance to general impact
• often more stable over time

UPVC doors (general strengths)

• widely used and cost-effective
• strong when the multi-point locks engage correctly
• easy to upgrade via cylinder replacement

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The key point: the cylinder matters most

For UPVC/composite doors, the euro cylinder is a common upgrade point.

A higher-security cylinder (anti-snap, anti-drill, anti-pick) combined with good fitting is often a bigger gain than changing door material alone.

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What to look for when buying

• strong frame + solid keeps/strike plates
• correct alignment so the mechanism engages cleanly
• reputable installation
• cylinder that sits close to flush (minimal projection)

Questions about your current door setup? Call: 020 3051 8388