Cold room wall panels form the vertical insulated enclosure of a refrigerated space, standing between the floor and ceiling to hold the room’s temperature while carrying the loads applied to the wall surface. Two metal facings—pre-painted galvanized steel, aluminum, or stainless steel—sandwich a high-density polyurethane (PUR) or polyisocyanurate (PIR) foam core for a self-supporting panel that needs no separate stud frame.
A double tongue-and-groove edge with cam-lock fasteners lets panels interlock vertically or horizontally into a continuous, airtight wall. The closed-cell foam blocks moisture drive through the envelope, and the joint geometry prevents the thermal bridging that shows up as condensation and frost on a poorly sealed wall.
Wall panels are engineered to take the loads the room applies to them: shelving brackets, hanging rail, and the daily impact of pallets and carts. Standard thicknesses from 60mm to 180mm and widths of 960mm or 1000mm let the wall be tuned to the operating temperature, with food-safe facings that withstand wash-down in food, beverage, pharmaceutical, and agricultural facilities.
Leading Cold Room Wall Panel Manufacturer
RaxPanel, a cold storage panel manufacturer based in Hebei, China, builds cold room wall panels engineered to stand plumb and carry the loads a working room applies to its walls. Each panel bonds a high-density polyurethane core between galvanized or stainless steel facings, with a cam-lock tongue-and-groove edge that locks adjacent panels into a continuous, airtight vertical envelope.
Wall panels have to hold more than their own weight. We control foam density, facing gauge, and joint strength so the finished wall takes shelving brackets, hanging loads, and the knocks of pallets and carts while staying sealed against heat and moisture. Panels are cut to the room’s wall height, which speeds vertical installation and keeps joints aligned.
We work directly with contractors and cold-chain operators to match thickness, facing, and finish to the room’s operating temperature and the wall’s load requirement. Contact RaxPanel for cold room wall panels that stand up straight, take the load, and hold the cold in.
| Parameter | Value |
|---|---|
| Core Material | High-density polyurethane (PUR) or polyisocyanurate (PIR) foam |
| Core Density | 40 – 50 kg/m³ |
| Thermal Conductivity (λ) | 0.020 – 0.024 W/mK |
| Fire Rating | B1 (DIN 4102) |
| Standard Thicknesses | 60 mm, 70 mm, 100 mm, 120 mm, 150 mm, 180 mm |
| Standard Width | 960 mm, 1000 mm |
| Length | Custom, up to 12,000 mm |
| Surface Materials | Pre-painted galvanized steel, Aluminum, Stainless steel |
| Surface Coating | Polyester, PVDF, Plastisol, Powder coating |
| Compressive Strength | ≥ 0.2 MPa |
| Operating Temperature Range | -45°C to +80°C |
| Joint System | Double tongue-and-groove with cam-lock / eccentric hook |
| Installation | Horizontal or vertical; on steel or concrete structures |
| Hygienic Properties | Non-porous, easy-to-clean, moisture-resistant surface |
| Blowing Agent | n-Pentane (CFC-free, zero Freon emissions) |
| Sealing | Neutral silicone sealant at joints |
Cold Room Wall Panel Engineering Guide & FAQ
A cold room wall is a vertical working surface, not just an insulating plane. It takes the knocks of pallets and trolleys, carries the shelving and rail fixed to it, and has to keep its thermal and vapor integrity at the two junctions that fail most often — wall-to-floor and wall-to-ceiling. Getting a wall right means matching skin gauge to the traffic it will see, detailing anchors so they hold without bridging cold, and sealing joints so the envelope stays airtight for the life of the room.
💡 Pro Tip: Cam-Lock Joints and Reinforced Anchor Zones
At RaxPanel, our cold room wall panels feature factory-embedded eccentric metal Cam-Locks that draw panel edges together under tension, compressing dual internal elastomeric gaskets into a vapor-tight seal. Where shelving or rail loads are planned, we can bond reinforcement into the core at the fixing points so anchors hold solid without crushing the foam.
At RaxPanel, our cold room wall panels feature factory-embedded eccentric metal Cam-Locks that draw panel edges together under tension, compressing dual internal elastomeric gaskets into a vapor-tight seal. Where shelving or rail loads are planned, we can bond reinforcement into the core at the fixing points so anchors hold solid without crushing the foam.
1. Impact Resistance and Skin Gauge Selection for High-Traffic Areas
The metal skin is the wall’s first line of defense against impact, and its gauge decides how much abuse it takes before denting through to the core. Standard 0.4–0.5 mm pre-painted steel suits chiller rooms with light trolley traffic. Where forklifts, pallet trucks, and racking operate, the skin should step up to 0.6–0.8 mm, and the most exposed zones — door reveals, aisle corners, loading faces — benefit from stainless steel or a protective PVC liner over the skin.
No skin replaces physical protection in a forklift aisle. Set steel bollards or rail guards in front of the wall at truck-bed height so an impact lands on the guard, not the panel.
2. Anchoring Shelving, Rails, and Equipment to Wall Panels
Insulated panels hold fixings differently from solid masonry, so the anchor type and its pull-out capacity must match the load. The foam core grips a fastener only lightly; real holding power comes from spreading the load across the skins and, for heavy loads, into bonded reinforcement.
Fixing Methods by Load:
- Light loads (signage, conduit, < 25 kg per point): Self-tapping screws or rivet nuts into the skin, with the load shared across several fixings.
- Medium loads (shelving brackets, 25–80 kg per point): Through-bolts with a backing plate or large washer on the far skin, clamping both facings so the foam is not loaded in bearing.
- Heavy loads (hanging rail, mezzanine brackets, evaporator supports): Factory-bonded reinforcement — timber or steel inserts laminated into the core at the fixing positions — so the bolt bears on solid material, not foam.
Specify the fixing positions and loads at the design stage so reinforcement can be foamed in at the right spots. On site, always seal the fastener head and the through-bolt shank with sealant to keep the vapor barrier intact, and verify capacity with a pull-out test before committing to a production run of fixings.
3. Thermal Bridge Prevention at Wall-to-Floor and Wall-to-Ceiling Junctions
The two horizontal junctions are where a cold room wall most often shows a cold line, condensation, or frost on the warm face. The fix is to keep the insulation continuous around the corner so no metal path bridges from the cold interior to the warm structure.
At the floor, the wall panel should not sit directly on the cold floor slab. Set it on a thermal-break strip or upstand, and turn the floor insulation up at the perimeter so wall and floor insulation overlap into a continuous break. Seal the internal corner with a coved skirting and sealant. At the ceiling, use an L-shaped internal corner trim bedded in sealant, and stagger the panel joints so no through-gap lines up at the junction. Where the wall meets a structural steel column, isolate the panel from the steel with an insulating spacer rather than letting the skin touch the cold-conductive member.
4. Vapor Barrier Continuity and Joint Sealing for Long-Term Performance
The metal skins are the wall’s vapor barrier, so the long-term performance of the envelope depends on every longitudinal joint and end lap staying sealed on the warm side. A joint that opens even slightly lets moist air into the core, where it condenses, degrades the foam’s R-value, and can freeze in freezer service.
Joint Sealing Practice:
- Cam-lock first: Draw every joint tight mechanically so the factory gaskets compress, then add sealant — never rely on sealant alone to close a gap.
- Warm-side seal: Apply neutral-cure silicone or butyl tape on the warm face of longitudinal joints and at all end laps and trims.
- Movement joints: On long wall runs, include a movement joint every 6–8 m so thermal expansion does not stress the panels and crack the seals.
- Inspection: Check joint sealant at the first seasonal temperature change and after any impact, resealing before moisture reaches the core.
5. Wall Panel Layout: Vertical vs Horizontal Installation and Joint Staggering
Orientation is a layout decision driven by wall height, handling, and how the joints line up. Vertical installation suits rooms up to about 6 m tall: each panel runs floor to ceiling in one length, joints run plumb and shed any condensation downward, and there are no horizontal end laps to seal mid-wall. It is the faster option for standard-height rooms.
Horizontal installation fits taller walls where panels would be unwieldy to stand, and where a lift places each course. Stagger the vertical joints between courses so they do not stack into one continuous seam, and keep courses level on a marked line. Whichever orientation is used, start from a true corner, keep joints off the centerline of door openings, and plan the run so cut panels land at corners rather than in the visible field of the wall.
Frequently Asked Questions (FAQS)
1. What skin thickness is recommended for walls exposed to forklift traffic?
Use 0.7–0.8 mm steel or a stainless skin in forklift zones, with a PVC liner over the skin in the most exposed areas. Standard 0.4–0.5 mm skins suit light trolley traffic only. Always add steel bollards or rail guards at truck-bed height so impact lands on the guard rather than the panel.
2. How do you anchor heavy shelving or rail systems to insulated wall panels?
Light fixings use self-tapping screws into the skin; medium loads of 25–80 kg per point use through-bolts with a backing plate clamping both skins. For hanging rail or heavy brackets, specify factory-bonded timber or steel reinforcement foamed into the core at the fixing positions, then seal each fastener to keep the vapor barrier intact.
3. How is the thermal bridge eliminated at the wall-to-floor junction?
Set the wall panel on a thermal-break strip or upstand rather than directly on the cold slab, and turn the floor insulation up at the perimeter so wall and floor insulation overlap into a continuous break. Finish the internal corner with a coved skirting and sealant so no metal path bridges cold to the structure.
4. What is the maximum wall panel length before expansion joints are needed?
On long runs, include a movement joint every 6–8 m so thermal expansion and contraction do not stress the panels or crack the joint seals. Fixings near a movement joint should allow slip, and the joint itself is sealed with a flexible sealant that accommodates the movement.
5. How do you repair a damaged wall panel skin without replacing the panel?
For a small dent or puncture, clean the area, fill the core void with compatible foam or structural filler, and bond a pre-finished repair patch over the skin, sealing all edges to restore the vapor barrier. Larger damage is cut out and a matching skin section bonded in with a sealed cover plate. Always reseal the joint after any impact repair.
6. Should wall panels be installed vertically or horizontally?
Vertical installation suits rooms up to about 6 m tall — panels run floor to ceiling in one length, joints shed condensation downward, and there are no mid-wall end laps. Horizontal installation fits taller walls placed with a lift; stagger the vertical joints between courses so seams do not stack into one continuous line.
Sandwich Panel Manufacturer
Custom Core & Skin • Tailored Dimensions