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Storage security: fire, theft and access explained

What makes storage truly secure? Four concrete threats — fire, theft, unauthorised access and climate damage — and the five criteria you can use to judge any provider. Plus: why we've had zero break-ins and zero fire incidents in nearly six years since founding.

Storage & Space
Portrait of Bram Jansen, Lead Storage Advisor at Inbox Storage
August 20, 2026Luuk Kamman

FOUR THREATS TO YOUR BELONGINGS

When you store belongings outside your home, four things can go wrong: fire, theft, unauthorised access to your unit, or damage from moisture and climate. What separates a good storage from a poor one is how the provider answers each threat. Below all four dimensions, with the standards insurers use to assess a storage site.

FIRE: PREVENTION + DETECTION + COVERAGE

Fire protection has three layers: prevent a fire from starting, detect quickly if it happens, and financial coverage if damage occurs.

  • Construction: our hub is fully stone and concrete with a large flat roof — fire-resistant materials that limit the spread of fire.
  • Sprinkler system and smoke detectors active 24/7 — modern fire protection that not only meets legal requirements but is also required by insurers as a coverage condition.
  • Coverage for fire runs via your own home contents insurance or the Inbox policy. Excess €200 per event, settlement on a 'new for old' basis.
  • Track record: in nearly six years since our founding we've had zero fire incidents in the hub. The combination of construction + sprinkler + smoke detectors works in practice.

THEFT: MORE LAYERS THAN JUST A CAMERA

For theft, one camera isn't enough. Insurers look at the full chain: construction, site security, electronic monitoring and physical supervision.

  • Fenced perimeter with access control — outsiders don't just walk onto the site.
  • 24/7 monitoring by a professional security company. Cameras both visible (deterrent) and hidden (evidence in case of an incident).
  • Alarm system linked to professional monitoring — when triggered, someone is on-site.
  • Racks up to 12 metres high — physical access to units without a forklift is practically impossible for outsiders.
  • Track record: in nearly six years since our founding we've had zero break-ins.

Tip: camera surveillance alone isn't enough. Reports in the Noord-Hollands Dagblad about break-ins in storage units despite cameras show that a complete security chain is the standard insurers set.

UNAUTHORISED ACCESS TO YOUR UNIT

Even on a secured site, people can end up at the wrong unit. At Inbox that's structurally impossible — and even our own staff can't see the contents.

  • During pickup we fill the unit together with you and immediately seal it with a black stretch film — a wrapping film that makes the unit unrecognisable and visibly damaged the moment someone tries to tamper with it.
  • Every unit is linked to your unique customer ID. Our staff only handle the unit, never the contents — literally: through the black film you can't see from the outside what's inside.
  • Access to the storage is only by appointment — unlike traditional self storage, no other customers or unauthorised people move through the building.
  • For in-between visits: we place your sealed unit in a separate anteroom, where only you access it. Never crossing with other customers — and there's no limit to how often you can visit.

Tip: storage comes to you instead of the other way around — that also solves the question 'who else is in the building'. In why people choose storage outside the home you'll read why that difference matters.

MOISTURE, TEMPERATURE & CLIMATE

Non-physical damage often comes from moisture, temperature swings or pests. Climate control is therefore a security question, not a luxury.

  • The hub is continuously ventilated and climate-controlled, with daily measurements of temperature and humidity.
  • Any deviation is corrected immediately; measurement is part of our operational routine.
  • Packing is your responsibility: inadequately packed items are excluded from insurance cover, however good the climate is.

Tip: the full breakdown of how the hub is set up, from construction to climate, is in what happens in the storage centre.

FIVE CRITERIA TO JUDGE ANY STORAGE PROVIDER

According to the European Self Storage Industry Report 2025 by FEDESSA, security in the European storage market isn't an extra but a baseline. Insurers set specific conditions for storage sites for their policies to respond — when a provider meets them, you can nearly always bring your own home contents insurance or take out an additional policy through the provider.

When comparing storage, you can judge each provider against these five criteria: (1) construction — stone and concrete spreads fire far less than wood or steel-composite; (2) fire protection — sprinklers plus smoke detectors is the standard insurers require; (3) camera monitoring — 24/7, visible and hidden, tied to an alarm system; (4) alarm with external monitoring — an alarm without professional monitoring is mostly a paper tiger; (5) access control — clear policy on who is on the site or in the building and when.

Our hub in Gouda meets all five. That's also why our customers can bring their own home contents insurance (upload your policy in the portal, we check the cover) or choose an additional policy via Reason Global, a specialised storage insurer we're proud to work with. According to the Dutch Consumentenbond, many home contents policies do cover temporary storage, but not all unlimited — so checking upfront is wise. With us, your own home contents policy is never required: as long as there's cover, it's fine.

🔥 Fire: sprinkler + smoke detectors + fire-resistant construction

🔓 Theft: fenced + 24/7 monitoring + cameras + alarm

🔒 Access: per-customer sealing + separate anteroom

🌡️ Climate: climate-controlled + daily measurements

Still deciding where to store your belongings? Enter your postcode and see within 60 seconds what mobile storage at Inbox costs — including the security insurers rely on.

Choose Inbox Storage for security at insurer standard, with zero break-ins since founding.

CALCULATE YOUR STORAGE

Enter your postcode and see in 60 seconds what secure mobile storage costs. No obligation, no hassle.

0 break-ins since founding
Sealed per customer
24/7 professionally monitored

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FAQ ABOUT STORAGE SECURITY

The questions we hear most when people evaluate storage — including honest answers about trade-offs with self storage.

HOW DO I KNOW IF STORAGE IS TRULY SECURE?

Test every provider against the five criteria insurers set. Missing one? That's a yellow flag.

  • Construction material: stone/concrete is the norm; wood or steel-composite is a risk.
  • Fire protection: sprinkler + smoke detectors active 24/7.
  • Cameras: 24/7, visible and hidden, tied to alarm.
  • Alarm with external monitoring: not just a siren, but a professional control room that responds.
  • Access control: clear policy on who's on site and when.

CAN ANYONE SEE OR ACCESS MY BELONGINGS?

No. During pickup we fill the unit together with you and immediately seal it with black stretch film — so the contents are literally invisible even to our own staff.

  • Black stretch film makes the unit unrecognisable from outside — you can't see what's inside.
  • Every unit has your unique customer ID; staff handle only the unit, never the contents.
  • In-between visit: sealed unit is moved to a separate anteroom — no crossing with other customers.
  • Unlimited by appointment, no cap on visits and no visit fees.

WHAT HAPPENS IN CASE OF BREAK-IN OR FIRE?

Track record: in nearly six years since founding, zero break-ins and zero fire incidents. Should it ever happen: financial cover + practical handling.

  • Your own home contents insurance often covers items stored temporarily outside your home — upload your policy and we check the cover.
  • If not: Inbox policy via Reason Global, from €16/mo for €2,000 cover up to €50/mo for €10,000.
  • Coverage: fire, lightning, storm, flood, burst pipes, theft with forceful entry.
  • Excess: €200 per event, €300 for water damage. Settlement on 'new for old' basis.

Tip: want to check your own home contents policy before pickup? In insurance during a move you'll read what to check.

WHY NOT 24/7 ACCESS LIKE SELF STORAGE?

Deliberate trade-off: 24/7 access also means 24/7 other people on site — usually without direct supervision. Our appointment-based access is safer.

  • At Inbox: only you access your unit, in a separate anteroom. No crossing with other customers.
  • At self storage: anyone with a pass can enter, including at night. Supervision then is usually just cameras.
  • Dutch news reports regularly cover break-ins at self storage sites — even with camera surveillance. Cameras often capture what happens, but don't prevent it.
  • Visiting us by appointment is unlimited and free of extra charge. We prep your units in the anteroom so you can take your time.

HOW DOES MY OWN HOME CONTENTS POLICY FIT IN?

Often it fits perfectly. At Inbox, your own home contents policy is never required and never forbidden — as long as there's cover.

  • Upload your policy in the portal; we check whether cover for temporary storage is sufficient.
  • If rejected (e.g. due to cover limits): Inbox policy via Reason Global. We're not a required-policy insurer; we facilitate what fits best.
  • Above €10,000 the request goes to the insurer for a custom quote.
  • Condition for cover: items packed correctly. Inadequately packed goods are excluded, even with good security.

Illustration of a purple Inbox Storage van delivering mobile storage at home
Inbox Storage staff member and customer carrying belongings together during pickup at home

Security at insurer standard

Construction, fire protection, cameras, alarm and access control meet the five criteria insurers require. Zero break-ins and zero fire incidents since founding. Your belongings are sealed with black stretch film — literally unrecognisable from the outside.

  • 0 break-ins since founding
  • 0 fire incidents since founding
  • Black stretch film sealing per customer
  • 24/7 professional monitoring