Connection of chamber walls with different temperatures (cold room + freezer)

Function of the junction

Cold room + freezer connection = the most challenging detail in a cold-storage facility. The 30-40°C temperature gradient (cold room +2°C, freezer −25°C) generates:

• Water vapour condensation on the colder side of the wall.
• Thermal stresses in the structure = potential cracking.
• Thermal bridging in the T-junction is 3-5× greater than in a typical node.

Solution per catalogue: removal of facings on both panels in the joint zone + PVC corner profile + OB-02 + OB-18 + 3-layer sealing.

Critical installation aspects

• Removal of facings on both panels within the 0.5×D zone — essential to eliminate the thermal bridge.
• PVC profile as a thermal break.
• OB-02 + OB-18 sheet metal reinforcement.
• 3-layer sealing: PUR foam (core) + plastic compound (each side) + EPDM gasket on fasteners.
• Pressure test is mandatory after completion.

Documentation

Cold Storage Catalogue GS insPIRe® CH (Gór-Stal 2025), page 24 — Cold room + freezer wall connection. Scale 1:5.

Components in this junction