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LPS 1175 Security Doors

When security cannot be compromised, choose LPS 1175 certified steel doors. Designed to resist forced entry and independently tested by the Loss Prevention Certification Board (LPCB), our security doors protect some of the UK’s most critical buildings and infrastructure.

Whether you’re securing a substation, data centre, defence facility or industrial plant, we can supply the right certified door set for your project.

Independently Tested
LPCB Certified
Manufactured in the UK
Nationwide Supply & Installation

Choose the Right Security Rating

Every building faces different security risks. We offer certified security doors from SR1 through to SR8.

SR1

Everyday Commercial Security

Ideal for protecting against opportunistic attacks.

Offices
Schools
Retail premises
Internal secure rooms

SR2

Enhanced Building Security

Designed to withstand more determined attacks using heavier hand tools.

Apartment buildings
Warehouses
Plant rooms
Commercial properties

SR3

High-Risk Commercial Protection

A popular choice where enhanced physical security is required.

Utility buildings
Police facilities
Communications rooms
Industrial sites

SR4

Professional Security

Resists prolonged attacks using powerful hand and battery-powered tools.

Data centres
Financial institutions
Government buildings
Critical infrastructure

SR5

Critical Infrastructure Protection

Designed for facilities where security is business-critical.

Electrical substations
Water treatment plants
Energy facilities
Transport infrastructure

SR6

Advanced Security

Protection against highly experienced attackers using specialist equipment.

Defence sites
Secure storage
High-value assets
Sensitive industrial facilities

SR7

Maximum Commercial Security

Built for environments requiring exceptional resistance against sophisticated attacks.

Military facilities
Research laboratories
High-security data centres
Government buildings

SR8

Ultimate Physical Protection

Our highest security rating, developed for the UK’s most sensitive facilities where maximum attack resistance is essential.

Nuclear sites
Defence establishments
National infrastructure
Secure government facilities
High-security vaults

Why Choose All Secure Doors?

LPS 1175 Certified (SR1–SR8)
Single and double steel door sets
Fire-rated and acoustic options available
Compatible with access control, panic hardware and high-security locking systems
Custom sizes and bespoke finishes
Powder-coated to any RAL colour
Nationwide installation by experienced engineers
Technical support from specification to completion

Typical Applications

Electrical Substations
Data Centres
Utility Buildings
Defence Facilities
Water Treatment Plants
Pharmaceutical Sites
Critical Infrastructure
Government Buildings
Transport Hubs
Industrial Plants

Need Help Choosing the Right Security Door?

Our security specialists will help you select the correct LPS 1175 certified door set based on your security requirements, insurance specification and project budget.

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