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Insulated floors are generally not required for walk-in cold rooms above 0oC unless they are situated above ground level such as on the 1st floor of a building. Insulated floors for freezers and cold rooms are available in 2 types: prefabricated insulated floors for smaller rooms; and the insitu insulated floor for larger rooms.
Prefabricated insulated floors
The prefabricated floor panels are similar to the wall and ceiling insulated panels, save that they are reinforced on the upper face. Various overlays such as aluminium checker plate and stainless steel are optional.
Insitu insulated floors
For heavy duty applications the insitu insulated floor is installed by placing 2 layers of high density polystyrene on top of a polythene vapour barrier, which forms a continuous seal with the wall vapour barrier, ready to receive a concrete wearing surface.
Heating sub-floor area of freezer rooms
It is advisable to ensure that the sub-floor area of insitu freezer rooms are adequately heated and/or ventilated to prevent frost in sub-floor turning to ice and damaging the building foundations. It is good practice to install an under floor heater mat with a sacrificial layer of 20mm polystyrene.