Ordering sandwich panels without complete specifications often leads to costly delays, wrong deliveries, or panels that fail to meet your project requirements. To get an accurate quote and a smooth production process, you need to provide your supplier with clear technical details upfront.

Core Specifications

Panel type and application. Start by specifying whether you need wall panels, roof panels, or cold room panels. This determines the structural profile and joint design. For example, roof panels typically require a ribbed profile for water drainage, while wall panels prioritize flat or lightly profiled surfaces.

Core material

Polyurethane (PU) and polyisocyanurate (PIR) are common choices, but they differ in fire performance and thermal efficiency. PU offers excellent insulation with a thermal conductivity around 0.022 W/m·K, while PIR provides enhanced fire resistance. Rock wool cores are another option when non-combustible insulation is required.

Dimensions

Be precise about thickness, width, and length. Standard panel thicknesses range from 40mm to 200mm, depending on your insulation and structural needs. Effective widths commonly fall between 950mm and 1,200mm. For length, most suppliers can produce custom sizes up to 12 meters or more, but shipping constraints—particularly container dimensions,often limit the maximum practical length.

Materials and Finishes

Steel facing thickness. Specify the thickness of both exterior and interior steel sheets. Typical options range from 0.3mm to 0.8mm. Thicker facings provide greater structural strength but add weight and cost.

Coating type and color

For exterior applications, PVDF coatings offer superior weather resistance compared to standard polyester. Interior facings may use lighter coatings or aluminum foil. Provide a specific RAL color code or reference a physical sample to ensure the finished panels match your design intent.

Fire performance requirements

If your project must meet building codes, specify the required fire rating. PU and PIR panels often achieve Euroclass B or higher ratings, while rock wool panels can reach Class A. Your supplier should provide third-party test reports to verify compliance.

Project Context

Intended application and environment. Mention whether the panels will be used in a cold storage facility, a clean room, an exterior warehouse wall, or a prefabricated house. Coastal or high-humidity environments may require edge-sealed panels with enhanced corrosion protection.

Quantity and delivery destination

Provide your estimated square meterage so the supplier can confirm minimum order quantities and calculate freight. Standard MOQs often start around 500m² or one 40HQ container, though smaller trial orders may be negotiable. Your destination port also affects CIF pricing and logistics planning.

Documentation and Support

Request technical drawings. A reliable supplier can provide panel layout drawings and installation manuals to help you plan the installation and avoid waste. For complex projects, some manufacturers offer CAD-based design assistance.

Confirm sample availability

Before committing to a full order, request material samples to verify color, finish, and core quality. Samples are often free, with the buyer covering courier costs.

Providing complete specifications at the inquiry stage reduces back-and-forth communication and helps your supplier deliver the right panels on time. A structured order form,covering panel type, core material, dimensions, steel thickness, coating, quantity, and destination,will make the process efficient for both parties.

For more information needed or any inquiry,please feel free to contact Yumisteel team.