{"id":2550,"date":"2026-08-24T14:23:24","date_gmt":"2026-08-24T06:23:24","guid":{"rendered":"https:\/\/www.raxdoors.com\/blog\/cold-room-panel-sheet-types-guide\/"},"modified":"2026-08-30T00:40:09","modified_gmt":"2026-08-29T16:40:09","slug":"cold-room-panel-sheet-types-guide","status":"publish","type":"post","link":"https:\/\/www.raxdoors.com\/ru\/blog\/cold-room-panel-sheet-types-guide\/","title":{"rendered":"\u0422\u0438\u043f\u044b \u043b\u0438\u0441\u0442\u043e\u0432 \u043f\u0430\u043d\u0435\u043b\u0435\u0439 \u0434\u043b\u044f \u0445\u043e\u043b\u043e\u0434\u043d\u044b\u0445 \u043f\u043e\u043c\u0435\u0449\u0435\u043d\u0438\u0439: \u0441\u0442\u0430\u043b\u044c, \u043d\u0435\u0440\u0436\u0430\u0432\u0435\u044e\u0449\u0430\u044f \u0441\u0442\u0430\u043b\u044c \u0438 \u0441\u0442\u0435\u043a\u043b\u043e\u043f\u043b\u0430\u0441\u0442\u0438\u043a \u2014 \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u0435"},"content":{"rendered":"

In insulated sandwich panel construction, outer facing sheets provide crucial structural rigidity, impact protection, vapor barrier encapsulation, and chemical resistance. While the core insulation material dictates thermal resistance, the metallic or composite skin directly confronts environmental attacks. These include high-pressure washdowns, aggressive sanitizing chemicals, forklift impacts, and atmospheric humidity.<\/p>\n

Specifying an incorrect sheet metal substrate leads to premature coating blistering, pinhole pitting, structural delamination, and food safety non-compliance. Selecting the optimal facing requires evaluating galvanization masses, paint polymer systems, stainless steel grades, and composite laminates. This engineering guide compares the primary sheet types used in cold room panel production<\/a>.<\/p>\n

\n \"Cold
Metal and composite facing sheets protect insulation cores from moisture, mechanical impact, and chemical attack.<\/figcaption><\/figure>\n

What Do Facing Sheets Do on a Cold Room Panel?<\/h2>\n

Insulated sandwich panels operate as structural composite beams under EN 14509<\/a> standards. In this composite structure, the outer facing sheets carry tensile and compressive bending stresses resulting from wind loads, thermal bow gradients, and self-weight.<\/p>\n

The rigid foam core transmits shear stresses between the two metal skins. The metal skin also acts as a hermetic vapor barrier (\\(\\mu = \\infty\\)). This impenetrable layer prevents atmospheric water vapor from penetrating the closed-cell foam core, maintaining low thermal conductivity over decades.<\/p>\n

Beyond structural support, panel facings must satisfy strict hygiene criteria. In meat processing, dairy production, and pharmaceutical cleanrooms, wall surfaces must withstand daily washdown protocols. These routines utilize alkaline foam cleaners, acidic sanitizers, and high-pressure hot-water sprays exceeding 80 bar.<\/p>\n

\n \"Continuous
Continuous automated roll forming ensures precise tongue-and-groove joint profiling across panel skins.<\/figcaption><\/figure>\n

Galvanized Steel: When Is Standard Coating Enough?<\/h2>\n

Continuously hot-dip galvanized steel is the most widely specified skin material for standard commercial cold rooms. The structural substrate typically comprises DX51D or S280GD<\/strong> structural steel under EN 10346<\/a>, offering sheet thicknesses between 0.5mm and 0.6mm.<\/p>\n

Corrosion protection relies on a sacrificial zinc layer applied via continuous molten bath immersion. Premium cold room panels specify a Z275 zinc mass<\/strong> (275 g\/m\u00b2 total on both sides, yielding approximately 20 \u00b5m zinc per side). This heavy zinc coating provides sacrificial galvanic protection if the surface is scratched.<\/p>\n

The galvanized substrate is coated with specialized coil-coated paint systems compliant with EN 10169<\/a>:<\/p>\n