Views: 0 Author: Site Editor Publish Time: 2026-07-04 Origin: Site
Project Background: The Condensation Nightmare
In early 2026, a Shandong-based frozen food manufacturer was struggling with persistent condensation on the interior walls and ceiling of its -18°C freezer. The existing cold room panel (a low-grade EPS sandwich panel) had degraded over 5 years, causing:
Water dripping onto products, leading to quality complaints
Ice buildup on panel joints, reducing usable space
Energy bills 40% higher than design specifications
The plant needed a complete replacement of its cold room sandwich panel system within 30 days to avoid production shutdown.
Why Cold Room Sandwich Panel?
After evaluating multiple suppliers, the plant chose Glostar’s PU sandwich panel (also known as insulated sandwich panel or freezer panel). Key performance data from Glostar’s CNAS lab:
Parameter | PU Sandwich Panel (Glostar) | Previous EPS Panel |
|---|---|---|
Thermal conductivity | ≤0.022 W/m·K | 0.038 W/m·K |
Fire rating | B1 (flame retardant) | B2 (flammable) |
Water absorption | ≤2% | ≥8% |
Compressive strength | ≥0.15 MPa | ≥0.08 MPa |
Installation speed | 120 m²/man/day | 60 m²/man/day |
The PU sandwich panel’s closed-cell polyurethane foam core provides superior thermal insulation and moisture resistance, making it the ideal cold room panel for sub-zero environments.
Solution Design: Full Cold Storage System
Glostar’s technical team designed a complete cold room sandwich panel system:
Walls: 100mm thick PU sandwich panel with galvanized steel facings, cam-lock joint system for airtight sealing.
Ceiling: 120mm thick insulated sandwich panel with integrated aluminum T-bar suspension.
Doors: Custom freezer panel doors with heated frames and magnetic gaskets.
Floor: 150mm thick XPS insulation board with reinforced concrete topping.
Installation Process: 25 Days to Completion
Day 1-3: Demolition of old panel, surface preparation, and floor insulation installation.
Day 4-12: Wall panel installation – each cold room sandwich panel was lifted by forklift and locked into place using the cam-lock system. Joints were sealed with double-component polyurethane adhesive.
Day 13-18: Ceiling panel installation – panels were suspended from steel beams using adjustable hangers.
Day 19-22: Door installation, floor finishing, and refrigeration system reconnection.
Day 23-25: Commissioning – temperature pull-down test, humidity monitoring, and final inspection.
Key Data:
Total panel area: 5,200 m²
Panel waste rate: <2% (factory pre-cut to size)
Installation crew: 8 workers
Average daily output: 200 m²
Results: Zero Condensation, 30% Energy Savings
After 3 months of operation, the plant reported:
Condensation: Absolutely zero on walls and ceiling, even during defrost cycles.
Energy consumption: Reduced by 30% compared to the old system, saving ¥180,000 annually.
Temperature stability: ±1°C across the entire freezer, vs ±3°C before.
Product quality: Customer complaints dropped to zero.
Customer Feedback
Mr. Li, the plant manager, commented: “The cold room sandwich panel from Glostar solved our biggest headache. The installation was fast, the team was professional, and the energy savings paid for the investment in just 2 years. We’re now planning to upgrade our other cold storage using the same PU sandwich panel system.”
Conclusion: Why Cold Room Sandwich Panel Is the Future
For any cold storage or freezer application, choosing the right cold room panel is critical. PU sandwich panel (insulated sandwich panel) offers the best balance of thermal performance, moisture resistance, and installation speed. Glostar New Materials provides a full range of cold room sandwich panel solutions, from design to delivery, backed by CNAS lab data and over 20 years of industry experience.
