Walk-in cold rooms: five interface mistakes we still see on drawings

Walk-in cold rooms look simple on an architectural drawing — a rectangular box with a door. But the devil is in the interfaces: how the cold room meets the floor, the ceiling, adjacent walls, and the rest of the kitchen. Get these wrong, and the problems compound quickly during installation.

After nearly four decades of installing cold rooms across the UAE, we have compiled the five mistakes we see most often — all of which are avoidable if caught at the design stage.

1. Floor finish level and insulated panels

Cold room panels typically sit on an insulated floor slab. If the finished floor level outside the cold room does not account for this, you end up with a step at the threshold — a trip hazard, a hygiene trap, and a barrier for trolleys. The correct approach is to recess the cold room slab so the finished floor is flush with the surrounding kitchen floor. This needs to be coordinated with the structural and architectural teams before the slab is poured.

2. Drain positions that conflict with door tracks

Walk-in cold rooms with sliding doors run on a bottom track. If a floor drain is positioned directly under the door opening — which happens more often than you would think — the track cannot be installed properly. The drain needs to be offset, and the floor graded to channel water away from the threshold. We specify drain positions as part of our cold room layout, not as a separate MEP exercise.

3. Condensing unit placement and service access

Condensing units generate heat, and in the Gulf summer they work hard. If the unit is mounted on the roof with no shade structure and no service access, maintenance becomes a safety issue and efficiency drops. We specify condensing unit locations that account for ambient temperature, airflow, refrigerant pipe length, and the ability for a technician to service the unit safely. This sometimes means a dedicated plant room rather than a rooftop location.

4. Adjacent heat sources

We frequently see cold rooms positioned directly beside cooking lines or dishwashing areas on drawings. The wall between a cold room at -18 degrees Celsius and a dishwasher radiating heat at 60 degrees Celsius has to work much harder to maintain temperature. Insulation thickness, vapour barriers, and compressor sizing all need to account for this adjacency. Better still, create a buffer zone or reposition the cold room where practical.

5. Electrical and controls specification

Cold rooms need dedicated electrical supply, temperature controllers, alarms, and often a door heater to prevent the seal from freezing shut on low-temperature units. These items are sometimes omitted from the electrical scope because they fall between the kitchen equipment supplier and the MEP contractor. We include them in our equipment specification to close the gap.

The common thread

All five of these issues share a root cause: the cold room is designed in isolation, without coordinating with the trades that surround it. Our approach is to detail these interfaces at the design stage and share a marked-up drawing with the architect, MEP engineer, and main contractor — so everyone knows what is expected before the first panel arrives on site.

If you are reviewing drawings for a project that includes walk-in cold rooms, these five points are a good place to start the conversation with your kitchen consultant.