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Deterioration Insurance for Perishable Goods in Construction & Engineering Insurance (UK Guide)
Introduction: why “deterioration” matters on site
Construction and engineering projects don’t just involve steel, concrete, and plant. Many projects also rely on temperature-sensitive or time-critical materials and goods that can spoil, degrade, or become unusable if conditions slip. Think chilled or frozen products for catering fit-outs, pharmaceuticals for healthcare builds, specialist resins and adhesives with strict storage limits, or food and drink stock being commissioned into a new facility.
When something goes wrong—power failure, refrigeration breakdown, incorrect storage, delayed commissioning, or a site incident—losses can escalate quickly. It’s not just the value of the goods. You may face disposal costs, clean-up, programme delays, contractual penalties, and reputational damage.
That’s where deterioration insurance for perishable goods can sit alongside Construction All Risks (CAR) and Engineering insurance. It’s a specialist cover designed to respond when insured goods deteriorate due to defined events, often linked to temperature control, power supply, or equipment failure.
What is deterioration insurance for perishable goods?
Deterioration insurance (sometimes referred to as “deterioration of stock” or “deterioration of refrigerated goods”) is insurance that covers loss of, or damage to, perishable goods caused by deterioration following an insured event.
In a construction and engineering context, it often applies where:
- Perishable goods are stored temporarily on site or in a project warehouse
- Refrigeration or temperature control equipment is being installed, tested, upgraded, or commissioned
- A facility is operationally “live” while works continue (phased handover)
- Contractors are responsible for goods under contract terms (e.g., JCT/NEC responsibilities)
It can be arranged as:
- An extension to a CAR/Erection All Risks (EAR) policy
- A standalone policy for stock/contents with deterioration cover
- A project-specific policy for complex builds (e.g., cold stores, food processing, pharma)
What counts as “perishable goods”?
Perishable goods are items that can spoil, degrade, or become unfit for purpose due to changes in temperature, humidity, contamination, or time.
Examples that can appear on construction and engineering projects include:
- Chilled/frozen food and drink stock during fit-out or phased opening
- Pharmaceuticals, vaccines, and temperature-controlled medical supplies
- Chemicals, resins, epoxies, adhesives, coatings, and sealants with shelf-life limits
- Biological samples or lab materials (for research facilities)
- Specialist components that must be stored within strict temperature ranges
The key is whether the goods have defined storage requirements and a known deterioration risk.
How deterioration cover fits with CAR/EAR and engineering insurance
CAR/EAR policies are designed to cover physical loss or damage to contract works, materials, and sometimes temporary buildings and plant, during the construction period.
However, perishable stock deterioration can fall into grey areas because:
- The goods may not be “contract works” (they may be stock for the end user)
- The trigger is often indirect (e.g., power failure leading to spoilage)
- Standard policies may exclude gradual deterioration, inherent vice, or temperature change unless specifically insured
Deterioration cover is typically structured to address these gaps by:
- Defining the insured goods and where they are stored
- Defining the insured events (e.g., breakdown, power failure, accidental damage)
- Setting conditions around alarms, maintenance, and temperature monitoring
Common insured triggers (what usually causes a claim)
Policy wordings vary, but deterioration claims in construction/engineering settings often arise from:
1) Refrigeration or temperature-control equipment breakdown
- Compressor failure
- Refrigerant leak
- Control panel malfunction
- Sensor failure causing incorrect temperature regulation
2) Power failure
- Site power outage
- Generator failure
- Electrical fault within the building
- Accidental damage to cables during works
3) Accidental physical damage
- Impact damage to cold room panels
- Forklift damage to doors or seals
- Water ingress affecting packaging and hygiene
4) Human error
- Doors left open
- Incorrect set points
- Poor stock rotation or misplacement
5) Delay and commissioning issues
- Extended commissioning periods
- Handover delays leaving stock in temporary storage longer than planned
Some policies will cover only a narrow set of triggers (e.g., breakdown and power failure). Others can be broader but will still include conditions.
What deterioration insurance typically covers
Again, wording matters, but cover commonly includes:
- Value of perishable goods that have deteriorated and are no longer fit for sale/use
- Reasonable costs of disposal (including regulated waste where applicable)
- Costs to clean and decontaminate storage areas after spoilage
- Sometimes, additional costs to mitigate loss (e.g., emergency relocation of stock)
Depending on the insurer and structure, it may also be possible to include:
- Loss of gross profit/business interruption arising from deterioration (more common for operational businesses than pure construction sites)
- Increased cost of working to keep goods within spec
What’s usually excluded (and why)
Deterioration cover is often tightly underwritten. Common exclusions include:
- Gradual deterioration or wear and tear (unless linked to an insured event)
- Inherent vice (the goods naturally spoil without an external trigger)
- Incorrect packaging or poor handling
- Failure to maintain refrigeration equipment or alarms
- Known defects or pre-existing faults
- Contamination unless specifically included
- Stock beyond shelf life or outside manufacturer storage requirements
- Unexplained loss (no evidence of an insured trigger)
In construction settings, insurers also pay close attention to:
- Whether the goods are under the contractor’s responsibility
- Whether the storage environment is temporary and how it is controlled
- Whether there is evidence (logs, alarms, maintenance records) to prove the temperature breach and timeline
Key policy features to check (the practical checklist)
When arranging deterioration cover, these are the areas that usually decide whether a claim is paid smoothly.
Sum insured and basis of settlement
- Is it replacement cost, selling price, or cost price?
- Are you insuring peak stock values (including seasonal spikes)?
- Are there sub-limits for certain goods (e.g., pharmaceuticals)?
Temperature conditions and monitoring
- Required temperature range and tolerance
- Whether continuous monitoring is required
- Whether logs must be retained (and for how long)
- Alarm requirements: local alarm, remote alarm, call-out response
Waiting periods and deductibles
Some policies include a waiting period (e.g., deterioration must continue for X hours after a trigger) or a time excess for power failure.
Maintenance and inspection conditions
- Planned preventative maintenance schedules
- Service contracts for refrigeration equipment
- Evidence of inspections and repairs
Security and access control
- Door seals, locks, and access logs
- Protection against accidental damage during works
Location and transit
- Are goods covered only at a named site, or also in temporary storage/containers?
- Is deterioration during transit covered (often separate)?
Who needs this cover on construction and engineering projects?
Deterioration insurance can be relevant for:
- Main contractors delivering facilities with phased handover
- M&E contractors installing refrigeration, HVAC, and control systems
- Cold store builders and refrigeration engineers
- Food processing plant contractors
- Healthcare and laboratory fit-out contractors
- Facilities management teams taking early responsibility for operational areas
- Developers and end users storing stock ahead of opening
If your contract makes you responsible for stock or temperature-controlled goods—even temporarily—this cover is worth reviewing.
Typical scenarios (real-world examples)
Scenario A: cold room commissioned, power outage overnight
A new cold room is commissioned during a supermarket fit-out. Stock is moved in early to support a phased opening. Overnight, a site power issue trips the supply. The back-up generator fails to start due to a battery fault. By morning, the temperature has been out of range for hours and the stock must be disposed of.
A well-structured deterioration policy may respond, provided alarms, maintenance, and evidence requirements are met.
Scenario B: accidental damage during ongoing works
A forklift clips a cold room door frame during final snagging. The door no longer seals properly. Temperature slowly rises and stock deteriorates.
Cover depends on whether the policy requires a defined “insured event” and whether the deterioration is considered a direct consequence of accidental damage.
Scenario C: refrigeration plant breakdown during phased handover
A food manufacturing facility begins limited production while construction continues in another area. A refrigeration compressor fails and replacement parts take 48 hours. Stock in process is lost.
This is where clarity around operational vs construction phases is critical—some CAR/EAR policies end at handover, while operational policies begin. Gaps can appear if responsibilities aren’t mapped.
Risk management: how to reduce claims and improve terms
Insurers price deterioration risk heavily based on controls. Practical steps that can reduce losses and improve premiums include:
- Continuous temperature monitoring with retained logs
- Remote alarms with a clear call-out rota
- Tested back-up power (generator load tests, battery checks)
- Planned maintenance with documented service reports
- Physical protection during works (bollards, barriers, traffic management)
- Clear procedures for door control and stock handling
- Emergency response plan: relocate stock, hire temporary refrigeration, contact lists
If you can show these controls, underwriting conversations are usually smoother.
What information insurers typically ask for
To quote deterioration cover, insurers often request:
- Description of the project and works (CAR/EAR scope)
- Type of goods, storage requirements, and maximum values
- Storage locations, construction type, and security
- Details of refrigeration equipment (age, make/model, maintenance)
- Power supply and back-up arrangements
- Alarm and monitoring systems
- Any previous deterioration incidents or near misses
The more specific you are, the more accurate (and often more competitive) the terms.
Contract and liability considerations (JCT/NEC and responsibility)
Insurance should follow responsibility. On construction projects, responsibility for goods can shift depending on:
- Contract terms (who bears risk at each stage)
- Practical completion and phased handover
- Storage arrangements (who controls access)
- Whether the goods are “materials for incorporation” or “client stock”
A common issue is assuming the contractor’s CAR policy covers everything on site. It may not cover client-owned stock, and it may not respond to deterioration triggers without extensions.
If you’re working under NEC or JCT, it’s worth aligning:
- The insurance schedule
- The risk register
- The handover plan
- The operational insurance start date
Deterioration vs contamination: don’t assume they’re the same
Deterioration is typically about spoilage due to temperature or time. Contamination can involve bacteria, chemicals, foreign objects, or taint.
Some policies exclude contamination unless it follows an insured event (e.g., water ingress due to accidental damage). If contamination risk is material (food production, pharma), you may need separate cover or specific extensions.
How to buy the right cover (quick steps)
- Map the exposure: what goods, where stored, peak values, and who owns them.
- Identify triggers: power failure, breakdown, accidental damage, human error.
- Check existing policies: CAR/EAR, property, engineering breakdown, stock.
- Close the gaps: add deterioration extensions or standalone cover.
- Document controls: monitoring, alarms, maintenance, back-up power.
- Agree claims evidence: temperature logs, service records, incident timeline.
FAQs: deterioration insurance for perishable goods
Does a standard Construction All Risks policy cover perishable stock?
Often not fully. CAR policies focus on physical damage to contract works and materials. Deterioration due to temperature change or power failure may be excluded unless specifically insured.
Is “engineering inspection” the same as engineering breakdown cover?
No. Engineering inspection is typically a statutory or risk-based inspection regime. Engineering breakdown insurance covers sudden and unforeseen physical damage to machinery and can be paired with deterioration cover where refrigeration equipment failure is a key trigger.
Can I insure client-owned stock stored on site?
Sometimes, but it must be declared and specifically included. Insurers will want clarity on ownership, responsibility, and controls.
What evidence is needed for a deterioration claim?
Usually: temperature logs, alarm records, maintenance/service reports, proof of stock value, and a clear incident timeline showing the insured trigger.
Does deterioration cover include business interruption?
Not automatically. BI is often separate and more common for operational sites. For projects with phased handover, you may need a combined approach.
What’s the biggest reason deterioration claims get disputed?
Lack of evidence (no logs), failure to maintain equipment/alarms, or the cause being outside insured triggers (e.g., gradual deterioration or inherent vice).
Call to action
If your construction or engineering project involves chilled, frozen, or temperature-sensitive goods—especially during commissioning or phased handover—deterioration cover can be the difference between a manageable incident and a major financial hit.
If you’d like, tell me:
- What type of goods you’re storing (food, pharma, chemicals, other)
- The maximum value on site at any one time
- Whether you have back-up power and temperature monitoring
…and I can help you outline the right insurance structure to discuss with your broker/insurer.