Fire resistance and burglary resistance are two different properties, and a safe strong in one may be weak in the other. Fire safes use insulating material to keep interior temperature below the point paper chars. Burglary safes use thick steel and hardened plate. Decide which risk actually concerns you before comparing prices.
Fire or force
A fire-resistant safe protects documents, passports and records from heat. Its walls are filled with insulating composite rather than solid steel — which makes it lighter and generally easier to attack physically.
A burglary-resistant safe uses armoured plate and relocking mechanisms. It resists drilling and prying, but its thin insulation offers little in a sustained fire.
Composite safes attempt both and cost accordingly. For most homes and shops, one of the two risks dominates: a jeweller worries about force, an accountant about fire.
Weight is the real deterrent
This is the point buyers underestimate most. A safe that can be carried out will be opened somewhere else, at leisure, with tools. The strongest lock in the world does not help if the whole unit leaves the building.
As a rule, anything under about 50kg must be bolted down through the floor or into a wall. Above 100kg, removal becomes difficult for opportunists. Above 150kg, it is effectively a two-person job with equipment.
Sizing
Safes are described by external height in centimetres. Two things surprise people:
- Internal space is considerably smaller than external dimensions, because the walls are thick. A 60cm safe does not hold 60cm of contents.
- The door needs clearance. Measure the swing before choosing a location, particularly in a cupboard or under a counter.
Buy one size larger than your current contents need. Safes fill up, and buying a second is more expensive than buying bigger once.
Lock types
- Digital keypad — fastest daily access, and codes can be changed when staff leave. Battery powered, with a key override.
- Twin key (2 kalon) — nothing electronic to fail, but keys must be controlled and copies tracked.
- Fingerprint — quick and personal; check how many users it stores and what the fallback is.
- Combination dial — mechanical and durable, slow in daily use.
Placement matters
Upper floors may need the slab load checked for heavier units. Avoid damp locations — humidity inside a sealed safe damages documents over time, and a small desiccant pack is a sensible addition in coastal areas.
Do not position a safe where it is visible from a window or from the shop floor. A safe nobody knows about is not attacked.
Hotel and in-room safes
Hospitality safes differ in one important way: staff need a documented override. Guests set their own code, and management can open the unit with a master key or audit-tracked override at checkout. Standard domestic safes lack this and are unsuitable for hotel use.
See Safes & Security Vaults and Hotel Room Safes.
Frequently asked questions
Is a heavier safe always better?
For resisting removal, yes. For fire protection, construction matters more than mass.
Should I bolt down a heavy safe?
Yes, if the design allows. Most safes include pre-drilled anchor holes.
What if the battery dies on a digital safe?
Digital safes retain their code and include a key override. Replace batteries annually rather than waiting for failure.