double wall corrugated boxes

double wall corrugated boxes are shipping cartons built from corrugated board with two fluted layers held between three liner sheets, giving them greater rigidity, crush resistance and stacking strength than a single fluted layer can offer. Custom Postal Boxes, a project of Vertex Packaging based in Wolverhampton, supplies double wall corrugated boxes with custom print options, low minimum order quantities, free design support and free UK delivery.

When double wall corrugated boxes are the right choice

Choose this construction when the contents are heavy, fragile, valuable or likely to be stacked in a warehouse, a vehicle or a pallet. Books, ceramics, glassware, metal parts, appliances and bulk food goods all punish weak cartons, and the cost of a damaged delivery is usually far higher than the small difference between board grades. Our double wall shipping boxes range is the starting point for goods that travel far or are handled several times before they arrive.

How the two fluted layers work

Each fluted layer is a wave of board that acts like a row of small arches, spreading vertical load down through the carton walls. Two layers, often combining a larger flute for cushioning with a finer flute for print surface and rigidity, resist both the squeeze of stacking and the knocks of handling. The liners between and around them hold the structure together and give the tape and print a stable surface.

Stacking strength and the bottom carton rule

In any stack, the lowest carton carries the combined weight of everything above it, so stacking performance is decided at the bottom of the pile. Keep the heaviest cartons lowest, align carton walls vertically so load travels through the fluting rather than across the panels, and avoid overhanging a pallet edge, which removes support from exactly the walls that need it most.

Choosing between single wall and double wall corrugated boxes

Our single wall corrugated boxes remain the sensible choice for light and compact goods that travel once and are not stacked high, because they use less material and store flatter. Step up to double wall when weight, stacking, distance or fragility increase, and consider our heavy duty shipping boxes options where loads are at the top of what cardboard should carry. Board grade, carton size and how the goods fill the carton all matter together, since a small and fully filled carton in a modest grade can outperform a large and half empty one in a stronger grade.

Sizing, filling and sealing for strength

Choose the smallest carton that holds the goods with their protection, fill remaining space so contents cannot build momentum, and seal with wide tape across the centre seam and the edges. A carton works as a system, and our corrugated shipping boxes page shows how board and carton style combine across a shipping range. Corners carry much of the stacking load, so protect them from crushing during strapping and handling.

Storage, reuse and responsibilities

Store cartons flat, dry and off the floor until they are needed, because damp board loses a large share of its strength before it is ever used. Sound cartons can often be reused for internal movements or returns, which extends their working life. Businesses placing packaged goods on the UK market should read the GOV.UK packaging producer responsibilities guidance to understand their obligations, and choosing the right board grade first time is itself a waste decision, since a failed carton wastes the goods inside it as well.

Share the weight of your packed goods, how high they will be stacked and how far they travel through our contact page for a quote, and we will advise whether double wall is needed or whether a lighter grade will do the job properly.

FAQs about double wall corrugated boxes

What is the difference between single wall and double wall board?

Single wall board has one fluted layer between two liner sheets, while double wall board has two fluted layers between three liners. The extra layer adds rigidity, cushioning and crush resistance, which is why double wall suits heavier goods and loads that are stacked.

How much weight can a double wall box carry?

There is no single figure, because safe load depends on carton size, board grade, how fully the carton is filled and how high it is stacked. Share the packed weight and stacking height when you ask for a quote and the grade can be matched to the real load.

Are double wall boxes recyclable?

Yes. Corrugated cardboard is widely recycled through business and household collections once tape is removed where required. Keeping cartons dry and clean in storage and after use helps them stay suitable for recycling or for reuse inside your own operation.

Can double wall boxes be printed?

Yes. The outer liner takes print, so handling guidance, branding and contents information can be added. Fine and detailed artwork prints best on the smoother liner grades, so mention print quality when you brief the carton and the board can be chosen accordingly.

When is double wall board not necessary?

Light and compact goods that travel once, are not stacked and carry little damage risk are usually served well by single wall board. Using double wall there adds material without adding protection the goods actually need, so grade should follow the load and the journey.