Double Wall Cardboard Mailer Box

When standard corrugated isn't enough, double wall cardboard mailer boxes deliver twice the structural protection. Two layers of corrugated board bonded together create a box that resists crushing, stacking pressure, and rough carrier handling — protecting your most valuable or heaviest products with confidence.

• Dual corrugated flute layers for maximum crush resistance
• Ideal for heavy, fragile, or high-value products
• Full-colour custom printing available
• Custom sizing for any product dimension
• Recyclable board — sustainable even at heavy-duty spec

For most standard ecommerce shipping, our corrugated mailer boxes provide excellent protection at a lower cost per unit.

When Standard Isn’t Strong Enough

Most products ship safely in single-wall corrugated. But some don’t. Heavy items that concentrate pressure at the base. Fragile ceramics or glass that need maximum buffer between contents and carrier contact. High-value products where the cost of a single damaged delivery outweighs the incremental cost of better packaging. Products shipped in mixed pallets where boxes are stacked under significant weight.

For these applications, double wall cardboard mailer boxes are the engineered answer. Two corrugated flute layers bonded between three liners create a panel structure with roughly double the compression strength of equivalent single-wall board — and significantly better puncture resistance.

Understanding Double Wall Construction

A double wall box consists of: outer liner / flute layer 1 / inner liner / flute layer 2 / inner liner. The two flute layers typically use different flute profiles (commonly BC-flute or EB-flute combinations) to optimise for stacking strength versus cushioning. Our packaging engineers select the appropriate flute combination based on your product weight, fragility, and shipping route.

Compare this to standard single-wall B-flute — which consists of just outer liner / flute / inner liner — and the structural advantage becomes clear under load testing.

Applications for Double Wall Boxes

• Automotive and industrial parts: Heavy metal components that concentrate weight on the base panel
• Machinery and tools: Items that may have sharp edges that would puncture single-wall board
• Ceramics and glassware: Fragile items where transit damage is financially significant
• Bulk food and beverage: Multi-unit cases of glass bottles or heavy containers
• High-value electronics: Items where return processing from transit damage is prohibitively expensive
• Art and framed prints: Flat-packed rigid items that can’t be reinforced with internal filler

Can Double Wall Boxes Be Printed?

Yes — though the print quality on double wall board depends on the liner surface. White-coated liner prints with the same quality you’d expect from standard corrugated. Uncoated kraft liner produces a more textured result consistent with natural/industrial aesthetics. We’ll advise on the best liner choice based on your branding requirements.

Frequently Asked Questions

How much heavier is a double wall box than single wall?

Approximately 40–60% heavier for the same external dimensions. This adds to your shipment’s gross weight — factor this into carrier cost calculations when evaluating double wall against single wall options.

Is double wall overkill for most ecommerce products?

For most products under 10 kg shipping via standard carrier, single-wall corrugated is sufficient. Double wall is most justified for products over 10 kg, fragile high-value items, or shipments known to transit harsh routes. Our team will help you assess whether double wall is genuinely necessary or whether a well-engineered single-wall solution handles your requirement.

Maximum Protection for Your Most Demanding Shipments

Some products can’t afford to arrive damaged. Request a quote for double wall cardboard mailer boxes and let us help you engineer packaging that protects.