Do roller shutters actually improve security? The evidence

Roller shutters are sold on security. Ask whether that marketing claim is backed by evidence and the answer is "yes, but the effect size depends on the lath specification, and most of the benefit comes from deterrence rather than physical resistance". This page works through what the published data actually shows, and what that means for a Highland buyer deciding whether the security premium is worth paying.

What the burglary data says

The honest starting point: there is no public dataset that isolates the effect of roller shutters from other security measures fitted at the same time. What we have instead is:

• Crime Survey for England & Wales modelling of household burglary risk, which consistently shows that properties with any combination of window locks, deadlocks, and external lighting are burgled at roughly one-third the rate of properties with none. Shutters sit comfortably inside that "hardened frontage" category, and share the deterrent effect.
• Police Scotland recorded-crime data for the Highland policing division shows domestic housebreaking running substantially below the Scottish average — reflecting low population density rather than any specific measure — but with rural commercial and outbuilding break-ins still concentrated in Q4 and Q1 each year. Rural burglary is disproportionately opportunistic and tool-light, which is exactly the threat model shutters address well.
• Home Office MO datasets on non-domestic burglary show that on commercial premises, forced entry via a shopfront roller shutter is rare compared with side-door or roof-light entry. Once a shutter is down, offenders route around it.

The common thread is that shutters are a strong deterrent. They signal that entry will be noisy and slow, and opportunistic offenders move on.

Deterrence vs physical resistance

A plain galvanised steel shutter (70–75 mm lath, 0.8 mm skin) is not a vault. Two people with an angle grinder and 90 seconds can cut a man-sized opening. But that is exactly the point: 90 seconds of grinder noise in a high street or a rural yard is a prohibitive amount of attention.

For higher threat levels, the Loss Prevention Standard LPS 1175 Issue 8 tests shutters against defined tool and time combinations, classifying them from A1 (opportunistic, hand tools, one minute) through to H20 (professional, power tools, twenty minutes). In practice:

• LPS 1175 A1/A3 is the baseline for retail and domestic applications and is what most quoted "security-rated" shutters actually carry.
• LPS 1175 B3/C3 is the typical specification for insurance-mandated shutters on pharmacies, jewellers, and cash-handling premises.
• LPS 1175 D5+ is bespoke, usually for government or critical-infrastructure use.

Each step up in LPS rating adds roughly 15–25% to the shutter cost and a heavier motor specification. For a rural Highland workshop or farm office the cost-benefit almost always lands at A3 or below.

Insurance discounts — what is realistic

Commercial insurers will sometimes mandate shutters as a condition of cover for late-night retail, stock-holding premises, and agricultural lock-ups. Where shutters are optional rather than mandatory, the premium effect is usually in the range of 5–15% off buildings and contents cover, and most insurers will want an LPS 1175-rated product specifically.

For domestic insurance in Scotland, our survey of ten UK insurers in early 2026 found that a fitted roller garage door did not meaningfully change the home insurance premium. What it did do was satisfy some insurers' minimum security requirements for keeping a classic or high-value vehicle in an integral garage — a threshold question rather than a sliding discount.

The operational safety trade-off

An often-overlooked point: a shutter that is down is also a shutter that has to come up before anyone can get out of the building. Powered shutters with a battery back-up and a manual chain hoist resolve this for commercial premises. For domestic integral garages with an internal pedestrian door, the risk is small and usually managed by treating the shutter as secondary to the pedestrian exit. For a detached garage or store with only the roller door as exit, a battery back-up is not optional.

Regulation 4 of the Workplace (Health, Safety and Welfare) Regulations 1992 and BS EN 13241 both place practical obligations on commercial buyers here, and a competent DHF-accredited installer will walk you through the commissioning check list. Skipping it is a common reason why insurers later decline commercial claims.

What to specify if you want the security benefit

The specification notes below are the ones that separate a shutter that works as a security measure from one that works as a weather cover:

• Anti-lift lath locks on both guides, or a bottom rail shoot-bolt. Without them, two people can physically lift a disengaged curtain.
• Internal locking on the barrel rather than bottom-rail padlocks. Bottom-rail padlocks are the first thing a grinder meets.
• Tested and rated lath — LPS 1175 A1 minimum for a shop; LPS 1175 C3 or higher for anything with stock on premises.
• Tamper-resistant fixings through the guides into the reveal, not just into the lintel.
• Key-operated external release replaced with a cylinder rated TS 007 three-star, or internal-only release plus a pedestrian door.

For most Highland domestic buyers the right question is not "which shutter is hardest to cut", it is "which product will actually be used every night". A shutter that is bolted open because it is awkward to close is providing zero deterrent effect. That is a surprisingly common outcome on retrofit installations where the motor is loud or the control is inconvenient.

Bottom line

Yes, roller shutters improve security — measurably, reliably, and at a price that scales with the threat. The largest part of the benefit comes from deterrence, which is available even on entry-level LPS 1175 A1 products and on standard galvanised commercial lath. Paying for higher classifications is worthwhile where stock value, insurance conditions, or a specific threat model justify it. For most domestic installations in the Highlands, the value of the shutter is in satisfying insurer minimums and in quietly removing the garage from the list of easy opportunistic entry points.