Yes — converting an existing room into a cold room is a common and often cost-effective alternative to constructing a standalone modular unit. However, the suitability of the existing room and the scope of work required vary considerably depending on the building’s construction, condition, and your target temperature.
When Conversion Makes Sense
Room conversion is worth considering when:
- You have a structurally sound brick, concrete, or block room that is already close to the required size
- The room is in a good location relative to your operations
- You want to avoid the expense of a full modular cold room for a chiller application (positive temperatures)
- You are retrofitting cold storage into an existing facility with minimal disruption
What a Conversion Involves
Insulation Lining
The existing walls, ceiling, and floor must be lined with insulated panels — typically 80–100mm PU panels for a chiller or 150mm for a freezer. These are fixed to the existing structure using appropriate fixings and sealants. The internal dimensions of the room will reduce by the panel thickness on each wall.
Floor Treatment
For chiller rooms, the floor may be treated with a food-safe epoxy coating rather than full floor panels, provided the existing floor is level, solid, and moisture-free. Freezer conversions always require insulated floor panels to prevent frost penetration.
Refrigeration Installation
A suitable refrigeration unit must be installed — either a self-contained monoblock unit through the wall or a split system with an external condenser. The choice depends on room size, wall construction, and available external space.
Door Replacement
The existing room door must be replaced with a proper cold room door — insulated, with a heavy-duty seal, and a safety release mechanism to prevent entrapment.
Electrical Work
A dedicated circuit must be run for the refrigeration unit, with appropriate earthing and surge protection.
Limitations and Challenges
- Old buildings with thin walls: If the existing room has poor structural integrity, conversion may not be feasible or may require significant remedial work before lining.
- Freezer conversions: Are more demanding than chiller conversions. The existing structure must be capable of supporting the weight of thick floor panels and withstanding the stresses of very low temperatures.
- Moisture and condensation: Existing rooms that have been subject to water ingress or rising damp are poor candidates for conversion without first addressing the damp problem.
- Ceiling height: Very low ceilings limit access and may compromise airflow, particularly for larger rooms.
Cost vs. Modular Build
In many cases, converting an existing room costs 20–40% less than a comparable modular cold room, primarily because the structural shell already exists. However, if the conversion requires extensive remedial work, the cost gap narrows. Always get comparative quotes for both options before deciding.
Room conversion is a practical option for chiller applications in good-quality existing buildings. For freezer rooms, careful assessment of the structure is essential. Engage a cold room contractor with conversion experience, not just modular installation experience — the techniques differ in important ways.