Modular cold room panels are prefabricated insulated sections that lock together on site to enclose a temperature-controlled room. A rigid polyurethane (PUR) or polyisocyanurate (PIR) foam core is bonded between pre-painted galvanized steel or stainless steel facings, producing a self-supporting unit that needs no separate framing.
The defining feature is the cam-lock joint. Each panel carries factory-embedded eccentric hooks; an Allen wrench draws adjacent edges together under tension, compressing the internal gaskets into a vapor-tight seal without screws, welding, or wet sealants. Panels arrive cut to size, so a walk-in cooler or freezer can be assembled, expanded, or relocated quickly.
Standard thicknesses from 50mm to 200mm and widths of 960mm, 1000mm, or 1120mm cover chiller, freezer, and blast-freezer duties. The bacteriostatic facing supports food-safety requirements, and the modular geometry lets the same components form walls, partitions, and ceilings across cold-chain logistics, food processing, and pharmaceutical facilities.
High-Performance Cold Room Panels Supplier
RaxPanel, an insulated panel manufacturer based in Hebei, China, builds modular cold room panels designed for fast cam-lock assembly. Each panel leaves the factory cut to the exact dimensions called for in the project drawings, with eccentric cam-lock hooks embedded in the foam so that an Allen wrench is the only tool needed to pull the room together on site.
The modular geometry is what makes these panels flexible: the same tongue-and-groove units form walls, partitions, and ceilings, and because the joints are mechanical, a room can be expanded, reconfigured, or dismantled and moved without destroying the panels. We match core chemistry, thickness, and facing to the operating temperature, whether the room runs as a chiller, a freezer, or a blast tunnel.
We work directly with contractors and cold-chain operators to translate room layouts into a panel schedule, so the components arrive ready to lock together. Contact RaxPanel to plan a modular cold room that goes up fast and comes apart clean.
| Parámetro | Valor |
|---|---|
| Material del Núcleo | Rigid Polyurethane (PUR) or Polyisocyanurate (PIR) Foam |
| Insulation Density | 40 – 50 kg/m³ |
| Thermal Conductivity (Lambda Value) | 0.020 – 0.024 W/(m·K) |
| Standard Panel Thickness | 50mm, 75mm, 100mm, 120mm, 150mm, 200mm |
| Standard Panel Width | 960mm, 1000mm, 1120mm (Customizable) |
| Cladding Material | Pre-painted Galvanized Steel, Stainless Steel (304 or 316) |
| Cladding Thickness | 0.4mm – 0.8mm |
| Surface Finish Options | Flat, Large Ribbed, Small Corrugated |
| Sistema de Junta | Tongue-and-Groove with Cam-Lock Fastener |
| Fire Resistance Rating | Class B1 (PIR), Class B2 (PUR) |
| Resistencia a la Compresión | ≥ 160 kPa |
| Temperature Range | -45°C to +10°C |
| R-Value (Per Inch) | 5.6 – 7.2 |
| Certifications & Standards | CE, FM, FDA, USDA, EN14509 |
| Método de Instalación | Modular, Vertical or Horizontal (Cam-Lock System) |
| Custom Length | Up to 12m (for shipping) |
| Color Options | RAL Chart (Polyester, PVDF, Plastisol, HDP coatings) |
Modular Cold Room Panel Engineering Guide & FAQ
A modular cold room is only as good as its panel schedule and joint integrity. Every decision upstream — room dimensions, panel width selection, corner detailing, cam-lock spacing — determines whether the enclosure goes together in a day or a week, and whether it holds temperature at -40°C without frost tracking through the seams. RaxPanel manufactures each panel to project-specific dimensions with factory-embedded eccentric cam-lock hooks, so the entire room assembles with a single hex wrench and no wet trades on site.
💡 Pro Tip: Panel Scheduling Saves More Time Than Faster Cranes
A 30-panel walk-in freezer assembled by two workers takes roughly 6–8 hours when panels arrive pre-labeled in installation order. The same room with unsequenced panels and field-measured cuts takes two to three days. RaxPanel ships panels numbered to match the layout drawing, with corner and T-junction pieces identified separately.
A 30-panel walk-in freezer assembled by two workers takes roughly 6–8 hours when panels arrive pre-labeled in installation order. The same room with unsequenced panels and field-measured cuts takes two to three days. RaxPanel ships panels numbered to match the layout drawing, with corner and T-junction pieces identified separately.
1. Room Configuration Planning: Panel Scheduling and Layout Optimization
Panel count starts from the room’s internal clear dimensions. Divide each wall length by the chosen panel width (960mm, 1000mm, or 1120mm) to get the number of full-width panels per run, then add one narrow infill panel if the remainder exceeds 200mm. Corner panels are factory-cut with a 90° return on one edge; T-junction panels carry a perpendicular stub for internal partitions.
For L-shaped or multi-room layouts, count corner panels (one per external 90° turn) and T-junction panels (one per internal partition connection) separately. Floor panels are scheduled independently and typically run perpendicular to wall panels to distribute point loads from racking.
2. Cam-Lock Assembly Sequence and Torque Specifications
RaxPanel cam-locks are operated with an 8mm hex key (Allen wrench). The eccentric hook rotates approximately 90° from open to fully engaged, drawing the mating tongue into the groove and compressing the gasket. Correct sequence matters: assemble walls from one corner outward, lock each joint fully before moving to the next, and never leave a panel half-engaged while you work elsewhere.
🔧 Assembly Sequence for a Rectangular Room:
- Step 1: Lay floor panels first, locking long edges together. Check diagonal measurements (±3mm tolerance over 6m).
- Step 2: Erect one corner panel pair, then build Wall A left-to-right. Each cam-lock gets a firm quarter-turn until the wrench meets positive resistance (approximately 8–12 N·m hand torque).
- Step 3: Return to the starting corner and build Wall B. The corner panel locks into both runs simultaneously.
- Step 4: Complete remaining walls, then install ceiling panels from one end, supporting each panel until both longitudinal joints are locked.
- Step 5: Walk the full perimeter and re-check every lock. A properly engaged cam-lock is flush with the panel face and cannot be turned further without excessive force.
Over-torquing is counterproductive: forcing the wrench past the positive stop deforms the foam around the hook housing and reduces gasket compression over time. If a joint will not close, separate the panels and check for debris or a misaligned tongue before retrying.
3. Dismantling, Relocation, and Expansion: Reuse Economics
Because cam-lock joints are purely mechanical, panels can be unlocked, separated, and reassembled without cutting or welding. In practice, a well-maintained panel set survives three to five full relocation cycles before gasket replacement becomes mandatory and cam-lock engagement weakens noticeably.
Expansion follows the same logic: unlock the end-wall panels, add new sections to extend the run, and re-lock. Because RaxPanel holds the original panel drawings, matching infill panels for an existing room can be manufactured to the same width, thickness, and facing without a full re-survey.
4. Sealing and Vapor Barrier Integrity in Modular Joints
The cam-lock joint is not just a structural connection — it is the primary vapor barrier. The tongue-and-groove geometry creates a labyrinth path that resists air infiltration, while the eccentric hook pulls the two panel faces into parallel alignment, compressing a continuous EPDM or butyl gasket seated in the groove. At full engagement, gasket compression reaches 30–40% of its free height, which is sufficient to block moisture vapor transmission at differential pressures up to 50 Pa.
Long-term gasket performance depends on three factors: the elastomer compound (EPDM retains elasticity down to -50°C; silicone is used where washdown chemicals attack EPDM), the compression set rating (specify ≤20% set after 72 hours at 70°C per ISO 815), and whether the joint was fully closed during assembly. A cam-lock left 10° short of full engagement leaves a 0.5mm gap that will frost within 48 hours of pull-down.
💡 Field Verification: The Flashlight Test
After assembly, darken the room and run a bright torch along the interior of every joint from outside. Any visible light penetration indicates incomplete cam-lock engagement or a damaged gasket section. Mark and re-work before commissioning the refrigeration system.
After assembly, darken the room and run a bright torch along the interior of every joint from outside. Any visible light penetration indicates incomplete cam-lock engagement or a damaged gasket section. Mark and re-work before commissioning the refrigeration system.
5. Modular Panel Selection: Thickness, Core, and Facing by Application
Panel specification is driven by the temperature differential between the room interior and the ambient environment. Thicker panels reduce heat gain and compressor runtime, but add cost and reduce internal clear space. The table below matches common cold room duties to RaxPanel modular configurations:
All RaxPanel modular panels use closed-cell foam at 40–45 kg/m³ density, giving a compressive strength above 160 kPa. This allows wall panels to span up to 3.5m between supports and ceiling panels to carry their own weight plus suspended equipment loads at spans up to 2.0m without intermediate hanging rods.
Frequently Asked Questions (FAQS)
1. How do you calculate the number of panels needed for a modular cold room?
Divide each internal wall length by the selected panel width (960mm, 1000mm, or 1120mm) and round up to the next whole panel. Add one corner panel per external 90° turn, one T-junction panel per internal partition connection, and schedule ceiling panels to match the wall panel count across each span. Floor panels are counted separately based on the room footprint. RaxPanel provides a numbered panel schedule with every order so installers know the exact quantity and position of each piece before delivery.
2. What is the correct cam-lock tightening sequence during assembly?
Start at one corner and work outward along each wall, fully engaging each cam-lock (quarter-turn with an 8mm hex key until positive resistance is felt) before moving to the next joint. Complete Wall A, return to the corner for Wall B, then close the remaining walls. Ceiling panels are locked last, working from one end toward the other. Never skip joints or leave a panel half-locked while assembling adjacent sections — this misaligns the run and makes later joints impossible to close without forcing.
3. Can modular cold room panels be reused after relocation?
Yes. Cam-lock joints are mechanical and reversible — panels unlock with the same hex wrench used for assembly. In practice, panels survive three to five full dismantle-and-rebuild cycles. At each relocation, replace the EPDM gaskets (approximately USD 1.50–3.00 per linear metre) and inspect cam-lock hooks for rounding. Total relocation cost typically runs 25–35% of buying new panels, making reuse economical for temporary cold storage, seasonal operations, and facility moves.
4. How do you expand an existing modular cold room by adding panels?
Unlock and remove the end-wall panels on the side you want to extend, then lock new panels into the exposed tongue-and-groove edges of the existing run. Because RaxPanel retains the original fabrication drawings, matching panels can be produced in the same width, thickness, core type, and facing colour without a full site re-survey. The existing ceiling may need extension panels as well; plan suspension points for the added span. A typical 3-panel extension (adding roughly 3m of length) takes two workers half a day once panels are on site.
5. What is the expected service life of cam-lock joints and gaskets?
The galvanized steel cam-lock hooks themselves last the life of the panel (20+ years) under normal single-installation use. Gaskets are the consumable: EPDM perimeter seals retain effective compression for 8–12 years in a static installation at -25°C, but should be replaced at every relocation or if compression set exceeds 25% (measured per ISO 815). In high-humidity environments above 80% RH, inspect gaskets annually for surface cracking or permanent flattening.
6. How do you verify joint tightness after assembly?
Three methods, in order of reliability: (1) Visual — every cam-lock face should sit flush with the panel surface with no visible gap at the tongue-and-groove seam. (2) Flashlight test — darken the room interior and sweep a bright torch along each joint from outside; any light penetration means the lock is short of full engagement or the gasket is damaged. (3) Thermal imaging — after 24 hours of pull-down, scan joints with an infrared camera; a properly sealed joint reads within 2°C of the adjacent panel face, while a leaking joint shows a cold streak or frost line.
Sandwich Panel Manufacturer
Custom Core & Skin • Tailored Dimensions