Why the repair visit is the right moment
Security upgrades to a commercial door involve work that overlaps the repair work substantially: door off the frame, lock body accessible, strike plate exposed, ironmongery available for assessment. Doing the upgrade as part of the repair adds an hour or two of engineer time rather than a fresh callout, fresh logistics, and a second period of door downtime.
For multi-site operators on maintenance contracts, building security upgrades into the annual service cycle is a common pattern — predictable cost, planned downtime, structured improvement across the portfolio.
Five upgrades that deliver most of the value
1. Hookbolt or multi-point lock. Standard latching is fine for daytime use but offers limited resistance to forced entry. Upgrading to a hookbolt (hooking deadbolt that resists pulling the door) or a multi-point lock (bolts engaging at top, middle and bottom) substantially increases force-entry resistance. Typical cost: £200–£500 fitted on top of a standard lock repair.
2. Anti-thrust plate. Metal plate fitted to the latch edge of the door that prevents a credit-card or lever from manipulating the latch. Cheap (£20–£60 fitted), simple, and stops the most common opportunist entry method.
3. Reinforced strike plate. Standard strike plates are thin pressed metal that can be twisted or pulled out of the frame under attack. Reinforced strikes have longer, thicker plates with longer fixing screws into the frame structure. £30–£80 fitted.
4. Anti-snap, anti-bump cylinder. Standard Euro cylinders are vulnerable to snapping (forcing the cylinder body to break) and bumping (lock-picking technique using specially-cut keys). Upgraded cylinders — TS 007 3-star rated or Sold Secure Diamond — defeat both attacks. £40–£120 per cylinder fitted.
5. Security signage. Visible signage (CCTV, alarmed premises, no cash on premises overnight) is a deterrent in itself. Cheap (£10–£30 per sign) but only meaningful when accompanied by the security measures it advertises.
For higher-risk premises: LPS 1175 graded hardware
LPS 1175 (Loss Prevention Standard 1175) certifies door, frame and hardware combinations for attack resistance, expressed as a Security Rating from 1 (lowest) to 8 (highest), each with attack time tolerances.
For commercial premises with high-value stock or cash, insurance often specifies or rewards LPS 1175 rated hardware. Common ratings:
- SR1: resists opportunist attack with no specialist tools — common minimum for general commercial.
- SR2: resists attack with simple tools (claw hammer, crowbar) for 3 minutes — common for retail, small offices.
- SR3: resists attack with bolt cutters and power tools for 5 minutes — typical for higher-risk retail (pharmacy, off-licence).
- SR4: 10 minutes against power tools — used for vault doors, high-value stores.
- SR5–8: military and critical infrastructure spec, rare in commercial.
- Specifying the right grade for the risk is the insurer’s job, usually informed by a security audit. Engineer fits to the spec; certificate accompanies the install.
Access control as a security upgrade
Adding access control (card readers, fob systems, biometric, keypad) to a door turns a security boundary into an auditable boundary — every entry is logged, every credential can be revoked, lost cards do not require re-keying the whole building.
For staff-managed sites (offices, warehouses, healthcare), access control significantly reduces the risk of unauthorised internal movement and removes the cost of re-keying after every staff change.
Cost varies widely: a simple standalone fob system on a single door is £400–£800 fitted. A networked multi-door system with central management is £200–£500 per door plus controller costs (typically £1,500–£5,000 for a system covering 10–30 doors).
Hostile vehicle and impact protection
For shopfront and high-street premises, vehicle impact is a growing concern — both deliberate (smash-and-grab attacks where a vehicle is used to breach the shopfront) and accidental.
Protective measures: bollards at the kerb edge (anti-vehicle, certified to IWA 14-1 for hostile-vehicle mitigation), reinforced shopfront frames with deeper structural anchors, security shutters on a fast-deploy timer for high-risk premises.
Decision usually rests on the insurer’s risk assessment — a contractor can quote and fit, but the spec needs to come from the security audit.
Documenting existing security at the repair visit
Even where no upgrade is needed, the repair visit is a chance to document existing security: make, model and rating of fitted lock and hookbolt, age and condition of frame and hinges, presence of alarm contacts, photographic record.
This documentation supports insurance claims (insurer can see what was fitted at the time of incident) and supports planning (when locks are approaching end-of-life, when hardware is below current insurer requirements).