Temperature-controlled transport: getting chocolate, drinks and frozen lines there intact
Most FMCG travels happily in a standard curtain-sider. Some of it does not. Chocolate blooms in a hot trailer, canned drinks can burst in a frozen one, and frozen meat that thaws on the road cannot legally be refrozen and sold. For those lines the question is not just how much freight costs but what temperature the goods see from the warehouse door to yours — and who can prove it.
Which goods actually need it
| Product | Typical range in transit | What goes wrong outside it |
|---|---|---|
| Frozen meat and poultry | −18 °C or colder | Partial thawing; a thawed product cannot be refrozen and sold as frozen. |
| Chilled meat, dairy | 0 to +4 °C (product-specific legal limits apply) | Shortened shelf life, rejection on arrival, food-safety risk. |
| Chocolate and confectionery | Around +15 to +18 °C | Fat bloom from heat, sugar bloom from condensation; deformed bars. |
| Beer, soft drinks, energy drinks | Protect from frost and strong heat | Frozen cans and bottles can burst; heat degrades beer flavour. |
| Cosmetics, detergents | Protect from frost and strong heat | Emulsions can separate; some liquids thicken or crystallise. |
These are typical working ranges, not a substitute for the manufacturer’s storage instructions on the case or the specification sheet. Where a product carries a stated range, that range is the one the transport has to hold.
Frozen: −18 °C is a legal line, not a preference
In the EU, quick-frozen food must be kept at −18 °C or colder, with only brief, limited upward fluctuations tolerated during transport. A load that arrives warmer than that is not just a quality problem — it can be refused outright, and a product that has thawed may not be refrozen and sold as frozen. That is why frozen loads move in refrigerated trailers that hold the setpoint for the whole journey, pre-cooled before loading.
Chocolate: the summer problem nobody quotes for
Chocolate is shipped ambient most of the year. Between roughly May and September, and on any southbound route, an ambient trailer can easily exceed 30 °C inside. The result is fat bloom — the grey-white film that makes perfectly safe chocolate unsellable. The opposite mistake is just as costly: chocolate taken from a cold trailer into a warm, humid warehouse sweats, and the condensation causes sugar bloom. A temperature- controlled trailer set to around 15–18 °C, and a little patience before the pallets are unwrapped, prevents both.
Drinks: the winter problem
Water-based drinks freeze a few degrees below zero. On a winter route through northern or eastern Europe, a curtain-sider parked overnight can get there. Frozen cans swell or split, glass breaks, and the damage spreads to every case underneath. For winter shipments of drinks on long or cold routes, ask for a heated or temperature-controlled trailer, or at minimum a box trailer rather than a curtain-sider.
What a temperature-controlled load involves
- The right equipment. For international carriage of perishable foodstuffs, the ATP agreement sets standards for insulated and refrigerated equipment. Ask whether the trailer is ATP-certified for the class your goods need.
- A pre-cooled trailer. A reefer cools air, not product. It should be at setpoint before loading, and the goods should already be at the right temperature — a trailer will not rescue warm stock.
- A temperature record. The reefer unit’s download or an independent data logger in the load gives you evidence for the whole trip. Without it, a dispute about whether goods thawed is one person’s word against another’s.
- Slightly less capacity and payload. Insulated walls and the refrigeration unit reduce internal space and payload compared with a standard trailer, which matters for the pallet and weight maths.
Checking the load on arrival
Before you sign the CMR, check the display or print-out of the reefer unit, probe a few cases from different parts of the load, and look for signs of past thawing (ice crystals inside packs, frozen drips, deformed cartons). Note any problem on the CMR before signing. A clean signature on a delivery note is very hard to argue with afterwards.
What it does to the price
Temperature-controlled freight costs more than ambient: the equipment is more expensive, the unit burns fuel, and there are fewer such trailers to choose from. On a full truckload it is usually a modest addition per pallet compared with the value of a load lost to heat or frost. Where a product only needs protection in some months, it can be quoted ambient in spring and autumn and controlled in summer or winter.
What to tell us
When you request a quote for chocolate, drinks, chilled or frozen lines, tell us the destination, the expected delivery month and any temperature requirement of your own warehouse or customers. We will say whether we recommend controlled transport for that route and season, and quote it as a separate line so you can see the difference.
Related reading: pallet and truckload maths, Incoterms for FMCG buyers (who carries the risk while the goods are on the road), and best-before dates and remaining shelf life.