Cold room insulation keeps the cold in and the heat out, around the clock. In Egypt’s climate, the temperature gap between a freezer room and the outside air can be very large. So each surface needs the right material: floor, walls and ceiling. This guide explains the options from their data sheets, and how Target handles cold storage projects.
Contents
- Egypt’s growing cold chain
- Cold room insulation by surface
- Floors: XPS boards under the slab
- Walls and ceilings: PU spray foam
- Freezer-ready floor finishes
- Execution steps for cold room insulation
- Common mistakes
- FAQ
- Conclusion
Egypt’s growing cold chain
Food exports, pharmaceuticals and modern retail all depend on the cold chain. As a result, new cold stores and freezer rooms keep appearing across Egypt, from logistics hubs to factory extensions.
Yet each of these rooms loses energy through its floor, walls, ceiling and doors. Good cold room insulation cuts that loss and protects the stored goods. In addition, it keeps the building structure away from damaging cold and condensation.
So cold room insulation is a long-term operating cost item, not a minor line in the contract. Every site mistake shows up later as higher power use, frost on walls or floor damage.
Cold room insulation by surface
In practice, different surfaces face different loads. Therefore, one material rarely suits all of them.
| Surface | Typical material (from data sheets) | Key values |
|---|---|---|
| Floor (under slab) | INSUboard XPS | Grades from 180 to 700 kPa; λ max 0.0289 W/m·K |
| Floor (general XPS) | INSUTECH ISO Foam (XPS) | λD 0.025–0.026 W/m·K; 250–350 kPa |
| Walls and ceiling | Rayston Foam 40E spray foam | λ 0.024 W/m·K; core density 40 ± 2 kg/m³ |
| Floor finish | Kemcrete SL or Impertop Fast 2K SF | Freezer-store use listed on both sheets |
Floors: XPS boards under the slab
First, the floor carries racking, forklifts and pallets, so its insulation must resist compression. Polystyrene boards made by extrusion (XPS) suit this role.
The INSUboard catalogue describes its XPS as ideal for over-deck and floor insulation in cold storages. Its grades range in compressive strength from 180 kPa (SX40) to 700 kPa (SX50). Thermal conductivity is 0.0289 W/m·K at most, and water absorption is 0.3% by volume (ASTM C-272). Moreover, the catalogue notes that higher-strength grades for load-bearing cold-store floors are available on request.
INSUTECH, an Egyptian maker, lists thermal insulation for refrigeration cabinets among the uses of its ISO Foam XPS. Similarly, its sheet gives λD of 0.025–0.026 W/m·K and compressive strength of 250–350 kPa, depending on thickness.
Walls and ceilings: PU spray foam
Walls and ceilings, by contrast, carry less load, but they have many corners, beams and pipes. Here, sprayed polyurethane foam forms a single layer that follows every shape.
Pass thickness matters too. According to the sheet, passes thicker than 10–20 mm lower the density and worsen dimensional stability. On the other hand, very thin passes raise the density and reduce yield. The sheet also recommends a spray distance of about 80 cm from the gun to the surface.
Rayston Foam 40E, supplied by Krypton Chemical and based on Huntsman SP 40 from Huntsman UAE in Dubai, is a closed-cell spray foam for roofs, walls and floors. Its sheet lists:
- Core density 40 ± 2 kg/m³ (BS EN 1602).
- Thermal conductivity 0.024 W/m·K (ASTM C518).
- Compressive strength 170 kPa at 10% deformation.
- Water absorption 0.90% by volume; closed cells ≥ 90%.
- CFC-free, with zero ozone depletion potential.
However, the sheet gives a fire classification of Class F / B3 (EN 13501-1). So the design must cover the foam with a suitable protective layer, as local fire rules require. Also, see our polyurethane foam page for wider uses.
Vapour control on the warm side
Warm, humid air tries to move into the cold room. If moisture reaches the insulation and condenses, performance drops. For this reason, designers place a vapour control layer on the warm side of the insulation.
Closed-cell materials help here, because they take up little water. Still, joints, fixings and pipe penetrations need sealing, since they are the usual weak points.
Junctions between floor, walls and ceiling
The floor boards and the wall foam must meet without a gap at the wall base. Otherwise, a cold bridge forms along the edge, and frost or condensation appears there first. Likewise, the ceiling foam should run down onto the wall foam. Door frames and pipe sleeves need the same attention.
Freezer-ready floor finishes
The floor finish faces cold, wet cleaning and wheel traffic together. Two products state cold-store suitability on their sheets.
Kemcrete SL from Prokem is a self-levelling epoxy floor. Notably, its Arabic data sheet lists food plants and cold and freezer stores among its uses. It states service temperatures from +120 °C down to −40 °C, and compressive strength of 60–70 N/mm².
Impertop Fast 2K SF from Krypton Chemical is a hand-applied polyaspartic coating. Its sheet states that it is suitable for operating freezing rooms. It also lists Shore 65D hardness and Taber abrasion of 15 mg. Application ranges from 200 to 500 g/m².
In both cases, the floor needs a dry base. Kemcrete SL asks for substrate moisture of 4% or less, and Impertop Fast 2K SF asks for less than 4%.
Preparing the floor before coating
The Impertop Fast 2K SF sheet sets clear slab rules. Cohesive strength must be at least 1.5 MPa, and compressive strength at least 25 MPa. New slabs need three weeks to dry before work starts. Air temperature should be 10–30 °C, with humidity of 40–80%. Kemcrete SL, for its part, asks for a surface temperature of 10–30 °C. So we hold the floor coating until these conditions are met, and the cooling stays off until curing ends.
Execution steps for cold room insulation
Target runs a typical cold room job in this order:
- Review the room temperature, loads and fire requirements with the designer.
- Lay the vapour control layer and XPS boards on the base slab, with staggered joints.
- Cast the wearing slab over the boards.
- Prepare walls and ceiling; seal gaps and penetrations.
- Spray Rayston Foam 40E in passes of 10–20 mm. For totals above 6 cm, leave 10 minutes between layers.
- Apply the protective covering over the foam.
- Grind the floor, check moisture, then apply the floor coating.
The foam sheet also sets weather limits: ambient +10 to +48 °C, relative humidity below 85%, and wind up to 20 km/h. For related works, see our tanks and thermal insulation works.
Common mistakes
- Using low-strength boards under racking. Choose the grade from the load.
- Spraying thick passes. The foam sheet warns that thick layers lose density and stability.
- Ignoring vapour control. Condensation inside insulation reduces its value.
- Leaving foam uncovered. Its fire class requires a protective layer.
- Coating a damp floor. Both floor products need moisture of about 4% or less.
FAQ
Is spray foam or panels better for cold room insulation?
In general, spray foam suits rooms built in concrete or masonry with many details. Prefabricated panel rooms are a separate system, outside the scope of these sheets.
Can EPS replace XPS under a cold room floor?
EPS is a different board with its own data. See our expanded polystyrene foam page, and check its compressive values against the floor load.
Which floor coating suits a freezer room?
Both Kemcrete SL and Impertop Fast 2K SF list cold-store or freezer-room use. The choice depends on traffic, cleaning and the time available for the work.
Conclusion
Cold room insulation works best when each surface gets the right material. XPS boards under the floor, spray foam on walls and ceilings, a vapour control layer on the warm side, and a cold-ready floor finish form a complete approach.
Target delivers turnkey insulation and flooring packages for cold stores across Egypt. Contact our team to plan the right build-up for your project.
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