Is a higher rating always better?

Higher ratings resist stronger attacks for longer, but they cost more and need suitable structure around the opening. Match the rating to the risk and to any insurer requirement.

Are there other security standards?

Yes. STS 202 and BS EN 1627 are also used for shutters and grilles. We can source products to whichever standard you need.

LPS 1175 security ratings explained

What LPS 1175 Issue 8 ratings such as A1, B3 and C5 mean, how they map to the old SR ratings, and how to check a product.

LPS 1175 is a standard from the Loss Prevention Certification Board (LPCB), part of BRE, for the intruder resistance of building products such as shutters, grilles, doors and fences. Products are attack-tested by trained testers using defined tool kits, and certified if they hold out for the required time.

Last updated 13 October 2026 by the Security Shutters UK team

A heavy steel security shutter closed over a stone-faced commercial entrance at night

How do Issue 8 ratings work?

Issue 8, which took effect in 2019, gives each product a two-part rating. The letter, from A to H, is the threat level: the tool kit and number of attackers used in testing. The number, from 1 to 20, is the minimum delay in minutes the product provides when locked. So B3 means threat level B with at least three minutes of delay.

How do they compare with SR ratings?

Issue 7 used single security ratings from SR1 to SR8. Many insurance policies and specifications still use them. As a broad guide, SR1 corresponds to A1, SR2 to B3, SR3 to C5, SR4 to D10, SR5 to E10, SR6 to F10, SR7 to G10 and SR8 to H20, but the tests are not identical, so check which version a policy or specification requires.

Who needs a rated shutter?

Rated shutters are typically used where stock or equipment is high value or attractive to thieves: pharmacies, jewellers, phone and electronics shops, tobacco and alcohol stores, plant rooms and critical infrastructure. Insurers and police crime prevention advisers sometimes specify a minimum rating.

How can I check a product is certified?

Certified products are listed in the LPCB's Red Book. The certification belongs to the manufacturer's tested product and stays valid only if it is installed as tested. We give you the certificate reference with our quote; we do not hold or claim LPCB certification ourselves.

Sources

This guide is general information, not legal advice. Rules can change, so check with your council, insurer or fire risk assessor where it matters.