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What are the Hardest Doors to Break Down?

What are the Hardest Doors to Break Down?

Securing a property’s perimeter represents a major priority for owners of sensitive commercial sites like factories, warehouses, and data centres. Robust entry barriers like security doors prove vital for keeping external threats safely outside.

Steel doors offer the most formidable protection against forced intrusions out of all door material options. High quality steel can endure tremendous blunt trauma impacts, hacking damage, cutting attempts or leverage force that would rip other doors apart.

Why Steel Security Doors are the Hardest to Break Down

Steel itself is an extraordinarily sturdy material at a molecular level. Steel’s tight metallic bonds create very strong structures that hold firm when placed under immense pressure. This allows steel to resist forces that would fracture wood or bend other metals.

Steel security doors leverage this natural strength of steel to create incredibly robust entry barriers.

Secure Design

On top of its raw power, steel doors also utilise purposeful security design features:

These specialised security features combined with ultra-durable steel construction enable steel doors to withstand prolonged criminal attacks that could penetrate normal wooden or glass doors.


Leading security authorities extensively test quality steel doors against simulated break-in conditions to certify their resilience. Certifications like LPS 1175, PAS 24 and STS 202 validate steel doors as the most impenetrable barriers available, earning them recognition as the toughest doors to breach forcibly.

Resilience Differences Against Other Commercial Door Materials

Steel security doors demonstrate greater resilience compared to other commercial door materials like wood, uPVC plastic, and composites when facing manual attacks. 

Understanding key vulnerability differences helps identify optimal barrier solutions: 

Wooden Doors

Even dense hardwood eventually cracks then splinters as fibre matrix bonds break down under sustained attacks. Once compromised, further blows rapidly disable wooden doors.

uPVC Doors

While thermally efficient, uPVC (unplasticised polyvinyl chloride) plastic doors fail quickly against hacksaws, improvised battering devices or simply outlasting its flexibility through brute force.

Composite Security Doors

Composite doors featuring insulating foam between dual protective skins do resist smash and grab attacks better than normal doors. However, composites still achieve weaker security certifications than dedicated maximum-strength steel security doors engineered to more extreme protective specifications.

Bradbury Group Steel Security and Fire Doors

High quality steel security doors offer superior protection compared to wooden or composite alternatives. Steel doors are the most formidable barriers against violent forced intrusion efforts thanks to dense durable construction.

With over 30 years industry experience, Bradbury Group leads in delivering state-of-the-art steel doors engineered to both client custom needs and stringent infrastructure security standards.

Our heavy duty steel door options include:


Our M2M+24 is a basic ultra-hard door that offers enhanced security performance. It has been tested to ensure it can withstand opportunist burglary attempts and comes with the Secured by Design Police Preferred Specification.

M2M2, M2M3 and M2M4

Our M2M2, M2M3 and M2M4 impenetrable steel doors are certified not just for basic burglary resistance, but to the more rigorous LPS 1175 SR2 to SR4 standards. These test their ability to withstand attacks from high impact power tools like rams, sledgehammers, and cutting equipment. 

Bradbury steel doors reliably transform facilities through lasting world-class protection. Get in touch with our advisors to start maximising the security capabilities of your property.