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REFRIGERATION

Comparison

Walk-in with insulated floor vs Floorless walk-in

A walk-in cold room can be built with insulated floor panels, so the room is a complete insulated box, or without them, standing directly on the building's concrete slab. Floorless rooms are cheaper and give level access for trolleys and pallet trucks, but the slab then becomes part of the room's envelope. That works for some coolers and fails for freezers. The right answer depends on the room temperature, what is under the slab, and how goods move in and out. On upper floors, the space below matters too.

Walk-in with insulated floor compared with Floorless walk-in
Walk-in with insulated floorFloorless walk-in
Heat gain through floorLow. The floor is insulated like the walls and ceiling.Higher. Heat from the ground or the room below flows into the cold room through the slab.
Suitable temperaturesCoolers and freezers.Coolers only, typically +2 °C and above. Not suitable for freezers.
Condensation belowInsulation keeps the underside warm, so the ceiling of a room below stays dry.On an upper floor, a cold slab can cause condensation and damp on the ceiling of the room beneath.
Ground freezing riskLarge freezers still need heating or ventilation beneath the floor to prevent frost heave.Not applicable because floorless rooms should not run as freezers.
AccessFloor panels add a step. A ramp, or recessing the floor into the slab, gives level entry.Level with the surrounding floor, so trolleys and pallet trucks roll straight in.
Load capacityStandard floor panels have load limits. Heavy racking or pallet trucks may need reinforced panels or overlays.The concrete slab carries heavy loads without special panels.
Slab preparationNeeds a level base, but the panels bridge minor imperfections.Slab must be level, crack-free and sealed, with a proper seal where wall panels meet it.
HygieneFloor panels with welded or sealed seams and coved joints are easy to clean.Wall-to-slab joints must be coved and sealed to stop water and pests getting in.
CostHigher, for the floor panels and any ramp or recess.Lower, assuming the existing slab is suitable.

Choose walk-in with insulated floor when…

  • The room will be a freezer, or may become one in future.
  • The room is on an upper floor above occupied space.
  • The existing floor is uneven, damaged or not suitable for food contact.
  • You want the lowest running cost and the best temperature stability.

Choose floorless walk-in when…

  • It is a cooler on a ground-floor slab, and frequent trolley or pallet traffic needs level entry.
  • You store heavy loads on racking that would overload standard floor panels.
  • The slab is sound, level and can be sealed properly at the wall joints.
  • Budget is tight and the room runs at chilled, not frozen, temperatures.

The verdict

Freezer rooms need an insulated floor, without exception, and large freezers need protection against ground freezing beneath it. For coolers, a floorless design on a good ground-floor slab is often sensible and gives better access for trolleys. If you need both insulation and level access, recessing the floor panels into a prepared pit in the slab gives you both, at extra civil cost. Whatever you choose, the joint between wall panels and floor is where most hygiene and leakage problems start, so insist that it is coved and sealed properly.