Why Every Cold Storage Facility Needs Floor Heating — And What Happens Without It
If you build or manage cold storage facilities in Australia, there's one problem that can cost you hundreds of thousands of dollars in structural damage — and it starts silently, beneath the floor.
Frost heave.
It happens when the sub-zero temperatures inside a freezer room push downward through the concrete slab and into the ground below. Moisture in the soil freezes, expands, and slowly lifts the slab from underneath. Cracks appear. Floors buckle. Racking systems go out of level. Left unchecked, the entire floor can fail — and with it, the operation sitting on top of it.
The solution is straightforward: electric floor heating installed beneath the slab, keeping the ground temperature above freezing point and preventing ice formation entirely. It's standard engineering practice for any freezer operating at -18°C or below, and increasingly specified for chiller rooms too.
How Frost Heave Damages Cold Storage Floors
The mechanism is simple but relentless. When a freezer room operates continuously at sub-zero temperatures, the cold gradually penetrates through the insulation and slab into the subgrade. Once the soil reaches 0°C, any moisture present begins to freeze. As water turns to ice, it expands — and that expansion pushes upward against the concrete slab.
The damage is cumulative. Over months and years, the freeze–thaw cycle creates lenses of ice in the soil that grow progressively larger. The slab lifts unevenly, causing differential movement across the floor. The consequences are serious: cracked concrete, uneven surfaces, damaged racking systems, forklift hazards, and eventually the need for a complete floor replacement — often requiring the facility to shut down entirely.
The cost of remediation is dramatically higher than the cost of prevention. Replacing a cold storage floor can easily exceed $200,000, not counting lost revenue during the shutdown. A properly designed heating system installed during construction costs a fraction of that and lasts the life of the building.
The ELEKTRA Solution: Dual-Cable Fail-Safe Systems
P.A.P. Heating Solutions designs frost heave prevention systems using ELEKTRA VCD10 twin-conductor heating cables. These are the same cables used in alpine driveway and outdoor slab heating — engineered for continuous, long-term operation in demanding conditions.
For cold storage applications, we typically specify a dual-cable system. Two independent circuits of VCD35 cable are installed beneath the slab, each capable of maintaining the required temperature on its own. If one circuit ever fails — even decades from now — the second circuit takes over automatically, maintaining frost protection while the first is repaired. There is no interruption to the facility's operation and no risk to the slab.
Every single ELEKTRA VCD10 cable is individually tested before leaving the factory. Not batch-tested, not random-sampled. Combined with XLPE insulation rated to 95°C continuous operation and a 20-year warranty, this is a system designed for the demands of commercial and industrial cold storage.
Door Heaters: The Other Critical Component
Frost heave prevention protects the slab, but cold storage facilities also need to protect their door openings. When warm, moist air meets the cold threshold of a freezer or chiller room door, ice builds up rapidly. Door seals fail, energy costs spike, and the door mechanism can jam entirely.
ELEKTRA DM20 and DH20 door heater cables are purpose-built for this application. Available in both 240V and 48V variants, they install around the door frame and threshold to prevent ice formation. The 48V option is particularly useful where low-voltage systems are specified for safety in wet or wash-down environments.
P.A.P. Heating Solutions supplies door heater cables for every type of cold storage door — hinged, sliding, rapid-roll, and strip curtain frames. We size each system to the specific door dimensions and operating temperature, ensuring reliable performance year-round.
Who Needs Cold Storage Floor Heating?
Any facility operating at or below 0°C should have frost heave prevention designed in from the start. This includes large distribution freezer warehouses operating at -18°C to -25°C, meat processing and cold chain facilities, pharmaceutical and vaccine cold storage, ice cream and frozen food manufacturing, fish processing and seafood storage, and supermarket chain distribution centres.
Even facilities operating slightly above 0°C — such as chiller rooms at +2°C to +4°C — can develop frost heave over time, particularly in regions with clay-heavy or moisture-retentive soils. If the facility operates continuously and the slab is in direct contact with the ground, a heating system is worth specifying.
Retrofitting vs. New Construction
The ideal time to install frost heave prevention is during construction, when the cables can be placed beneath the insulation and slab as part of the normal build sequence. The cost is minimal relative to the overall project budget.
Retrofitting is possible but significantly more complex and expensive. It typically involves cutting or removing the existing slab, installing heating cables, and re-pouring — a disruptive and costly process. This is why prevention during the design phase is always the recommended approach.
If you're involved in the design or construction of cold storage facilities, specifying floor heating from the outset protects the asset for its entire operational life.
Australian Standards and Engineering Confidence
ELEKTRA VCD35 cables meet IEC 60800 (heating cable standard) and EN 60335-1 (heating unit standard). They carry compliance for the Australian market and are manufactured under ISO 9001 quality management. The manufacturer also holds an ISO 14025 Environmental Product Declaration, which can support green building certification where required.
P.A.P. Heating Solutions has been supplying electric heating systems to Australian industry since 1987. We work directly with engineers, refrigeration contractors, and builders to design systems that meet the specific thermal requirements of each project.
Talk to the Specialists
If you're planning a new cold storage facility, upgrading an existing one, or dealing with frost heave damage in a current building, we can help. P.A.P. Heating Solutions provides free consultation, system design, and technical support for cold storage heating projects anywhere in Australia.
Phone: (02) 6242 9310
Email: info@papheatingsolutions.com.au
Office: 23 Winchcombe Court, Mitchell ACT
We're Australia's exclusive distributor of ELEKTRA heating cables — the right product for the job, backed by a 20-year warranty and nearly 40 years of local expertise.
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