double wall cartons

When a load is heavy, fragile or likely to be stacked in a warehouse or a courier cage, double wall cartons give you two fluted layers of corrugated board between three liners for markedly greater crush and stacking strength than a single wall box. Custom Postal Boxes supplies printed and plain cartons from Wolverhampton with free design support and free UK delivery on quoted orders.

How double wall cartons are built

A double wall board combines two layers of fluting with three flat liners, one on each face and one in the middle. That sandwich spreads weight across the panel, resists punctures and holds its shape when cartons are stacked several high. Typical uses include electronics, glassware, ceramics, tinned goods, books in quantity and machinery parts, where a collapsed box would mean a written off product rather than a minor crease.

Our Double Wall Shipping Boxes and Heavy Duty Shipping Boxes cover the most demanding dispatch work, while the Corrugated Boxes category shows the wider board range. Choosing between them starts with the weight of your load and how it will be handled, not with box colour or print.

Stacking strength and warehouse storage

Warehouses earn their money from vertical space, so cartons are stacked. Double wall board keeps lower cartons from bowing under the weight above them, which protects both the box and the product during weeks of storage. If you palletise goods, a strong carton also holds its edges better under stretch wrap tension, keeping the pallet square and stable for forklift movement and loading.

Flute combinations and what they change

Board makers combine different flute sizes in one double wall sheet. A fine flute on the outside gives a smoother print surface, while a larger flute inside adds cushioning and compression strength. Tell us whether your priority is print quality, stacking or impact protection and we will specify the combination accordingly, rather than selling one standard board for every job regardless of contents.

When a single wall carton is not enough

Warning signs include boxes that bulge at the sides, tape seams that split, corners that arrive crushed and returns caused by transit damage rather than product faults. Weight alone is not the only test, because a dense item in a small carton concentrates pressure, and a long courier route with several handling points punishes weak board. Stepping up to double wall often costs less than the refunds and replacements it prevents.

Businesses reviewing their packaging waste can also read the GOV.UK guidance on extended producer responsibility for packaging, which explains reporting duties for organisations that place packaging on the UK market. Using the right board first time, and sizing cartons closely, reduces both damage and the amount of material each order consumes.

Packing double wall cartons well

Strength does not remove the need for good packing. Wrap fragile pieces individually, fill voids so contents cannot shift, and place the heaviest items at the bottom of the carton. Tape the centre seam and the edge seams, and keep the carton weight comfortable for safe lifting. For very heavy loads, split the order across two cartons rather than testing one box and one courier handler at their limits.

To order, send your load weight, carton size and quantity through our contact page for a quote. Every order is quoted on size, material and quantity, with custom print available if you want handling marks, branding or product information on the carton itself.

FAQs about double wall cartons

How much weight can double wall cartons hold?

It depends on the board grade, the carton size and how evenly the load is spread, but double wall cartons are commonly chosen for loads that would strain a single wall box, including consignments well into double figures of kilograms. Tell us your load weight and we will specify a grade with a safe working margin.

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

A single wall carton has one fluted layer between two liners, while a double wall carton has two fluted layers and three liners. The extra layer adds crush resistance, puncture resistance and stacking strength, at the cost of a slightly heavier and thicker board. Light, robust goods suit single wall, while heavy or fragile goods suit double wall.

Can double wall cartons be printed?

Yes. Double wall cartons can carry logos, handling instructions, product codes and safety information. A fine outer flute gives a smoother surface for clearer print. Print is useful in warehouses as well as for customers, because staff can identify contents and orientation quickly without opening the carton.

Are double wall cartons recyclable?

Corrugated cardboard is widely recycled in the UK through household and commercial cardboard collections, provided it is clean and dry. Keep tape and void fill choices in mind if easy recycling matters to your customers, and reuse sound cartons for returns or internal movements before you recycle them.