- Five-ply corrugated wall architecture: two fluted cushioning layers bonded between outer, center, and inner linerboards.
- High stacking and puncture strength (48 ECT, 51 ECT, and higher ) for heavy parcel and LTL pallet transit.
- Custom printed outside and inside on natural kraft or white board with zero die or plate charges and a 3D mockup before payment.
- Minimum order quantity, delivered flat (KDF) in 10–14 business days.
Custom Double Wall Boxes
Custom double wall boxes are heavy-duty 5-ply corrugated shipping cartons built with two arched fluted mediums sandwiched between three flat linerboards (such as BC-flute or EB-flute). Engineered for dense, fragile, or pallet-stacked payloads from cast-iron cookware and auto parts to 12-bottle spirits cases, orders ship free across all 50 US states in 10–14 business days.
What are custom double wall boxes?
Custom double wall boxes are industrial-strength 5-ply corrugated shipping containers engineered for payloads that exceed the puncture, drop, or vertical stacking limits of standard 3-ply single-wall cartons. By bonding two distinct corrugated flute arches (most often coarse C-flute paired with dense B-flute as BC-flute at approx. 9/32 in / 7 mm thick, or fine E-flute paired with B-flute as EB-flute at approx. 3/16 in / 4.6 mm thick) between an outer liner, a center divider liner, and an inner liner, the wall acts like a structural I-beam. The finer outer flute resists sharp warehouse forks and conveyor impacts while the deeper inner flute absorbs drop shock for cast-iron kitchenware, desktop electronics, brake rotors, power tools, hardware fasteners, and multi-bottle wine or spirits cases. Built primarily in the Regular Slotted Container (FEFCO 0201 RSC) layout with a pre-glued or stitched side joint, CubitPack custom double wall boxes arrive flat with free US delivery.
How is a 5-ply double-wall corrugated box built?
Five bonded paper layers (three flat kraft or white linerboards separated by two fluted arches) are deep-scored and slotted so heavy walls fold squarely into a crush-resistant Regular Slotted Container. Whether your team calls them custom double wall corrugated boxes, heavy duty double wall shipping boxes, 48 ect double wall cartons, printed bc flute shipping boxes, custom printed double wall boxes, double wall boxes with logo or printed double wall boxes, every sheet is cut to your exact inside dimensions.
- 1Outer, center & inner linerboards (3 liners)
Virgin kraft, mottled white, or recycled liner plies that lock two flute mediums into a rigid 5-ply composite beam. - 2Dual fluted mediums (BC-flute or EB-flute)
Two arched corrugated waves stacked in tandem: one absorbs high-energy drop shock while the second resists surface puncture and print crush. - 3Deep-creased top & bottom RSC flaps
Wide-channel horizontal scores and 9–10 mm flap slots allow thick 5-ply minor and major flaps to fold 180 degrees without cracking or tenting. - 4Heavy-duty manufacturer's side joint
Extra-wide 1.5 to 2.0 inch side glue tab (bonded with high-shear adhesive) so the 5-ply carton ships knocked-down flat (KDF) in bundles. - 5Optional EPE foam, honeycomb, or 2-ply dividers
Custom internal bottle partitions, kraft honeycomb buffers, or closed-cell EPE foam end-caps sized to your usable interior L × W × H.
Double wall box facts
- Closure
- Four top & four bottom 5-ply RSC flaps sealed with water-activated reinforced H-tape
- Best for
- Cast-iron kitchenware, desktop electronics, auto parts, power tools, 6/12-bottle spirits & wine, hardware, heavy sports gear
- Window
- No (solid 5-ply walls maximize stacking compression and puncture protection)
- Inserts
- Yes, EPE foam end-caps, double-wall bottle partitions, honeycomb pads, or card inserts
- Minimum
- Confirmed with your quote; quote presets from 250 boxes
- Turnaround
- 10–14 business days, rush 4–5
- Materials
- 5-ply brown kraft corrugated, mottled/coated white corrugated, or high-recycled double-wall board
- Arrives
- Shipped knocked-down flat (KDF) with pre-glued side joint in strapped bundles or pallets
- Size range
- Any inside L × W × H to order
Double wall boxes vs single-wall RSC shipping boxes vs die-cut boxes
| Double wall | Shipping | Die cut | |
|---|---|---|---|
| Wall ply construction | 5-ply combined board: 2 fluted mediums between 3 flat linerboards | Primarily 3-ply single-wall (1 flute between 2 liners), plus group options | One-piece steel-rule die-cut folder (usually E-flute or B-flute single-wall) |
| Wall thickness | ~4.6 mm (EB-flute, 3/16 in) to ~7.0 mm (BC-flute, 9/32 in) | ~3.2 mm (B-flute, 1/8 in) to ~4.0 mm (C-flute, 5/32 in) single-wall | ~1.6 mm (E-flute, 1/16 in) to ~3.2 mm (B-flute, 1/8 in) |
| Typical ECT & payload | 48 ECT to 51–71 ECT; engineered for 40 to 120+ lb & tall pallet stacks | 32 ECT to 44 ECT; ideal for everyday 5 to 40 lb parcel shipments | 32 ECT to 44 ECT; best for 1 to 25 lb tape-free kits, food, and hardware |
| Puncture & side-impact armor | Maximum: center liner stops sharp metal corners and forklift bumps cold | Standard: single fluted arch cushions everyday parcel chutes | Double-thick on rolled side walls; single-ply on flat top and base |
| How it closes | Reinforced water-activated paper H-tape across 5-ply RSC flaps | Single-strip or H-taped RSC flaps | Self-locking die-cut tabs, slots, or tear-strip zipper (zero tape) |
| Best used for | Dutch ovens, monitors, brake rotors, tools, 12-bottle wine/spirits, export & LTL pallets | General e-commerce parcels, apparel master cases, and light wholesale cartons | Artisan pizza, handled meal kits, electronics cradles, and custom shapes |
Save this comparison
The styles on one sheet. Pin it, or share it with whoever packs your boxes.
Still deciding between styles?
Request a Quote →Are custom double wall boxes right for my product?
- Your packed carton weighs 35 to 100+ lb or contains dense metal, cast iron, glass bottles, or sensitive electronics that punch through single-wall board
- You stack master cases 4 to 6 tiers high on warehouse pallets, in humid ocean containers, or on LTL freight trailers where bottom boxes cannot buckle
- You want branded CMYK, Pantone, or white-ink outer cartons strong enough to ship heavy appliances and tools without wooden crates or outer overboxes
- You need custom EPE foam end-caps, kraft honeycomb pads, or 6- and 12-cell double-wall bottle partitions engineered to exact interior dimensions
- You want right-sized heavy-duty cartons with zero die or plate setup fees and free delivery across all 50 US states
- Your everyday e-commerce parcels weigh under 30 lb and ship fine in 32 ECT single-wall board: custom shipping boxes
- You want a self-locking hinged gift mailer that opens without packing tape: custom mailer boxes
- You need custom octagonal shapes, steam vents, carry handles, or tape-free locking tabs: custom die-cut boxes
- You are sourcing residential or office relocation cartons in graduated room sizes: custom moving boxes
- You want an ultra-luxury rigid chipboard presentation box for indoor retail display: custom rigid boxes
What are custom double wall boxes used for?
Whenever dense metal edges, fragile glass multi-packs, or multi-pallet warehouse loads threaten to crush a single-wall shipper, brands step up to 5-ply custom double wall boxes. Explore the top eight heavy-duty applications
What are custom double wall boxes made of?
Every 5-ply sheet laminates two arched corrugated mediums (BC-flute or EB-flute) between three high-tensile flat linerboards
Which finishes work on custom double wall boxes?
What can I add to a custom double wall box?
Double wall box specifications
| Spec | Options |
|---|---|
| Construction | 5-ply double-wall Regular Slotted Container (RSC / FEFCO 0201) or Full Overlap (FOL / FEFCO 0203) with wide-bonded side manufacturer's joint |
| Board | 3 flat linerboards + 2 fluted mediums in natural brown kraft, mottled/coated white, or recycled corrugated board |
| Flute & strength | BC-flute (~9/32 in / 7.0 mm) or EB-flute (~3/16 in / 4.6 mm); 48 ECT, 51 ECT, 61+ ECT, or 275–350# Mullen |
| Printing | 1–3 color direct flexo (including white ink on kraft), high-speed digital CMYK, or offset litho-lamination with Pantone matching; outside and inside |
| Add-ons | Custom EPE foam end-caps, interlocking double-wall cell dividers, kraft honeycomb buffers, reinforced carry hand-holes on request, tissue paper |
| Size range | Custom scored to your exact usable inside Length × Width × Height (+14 mm BC wall buildup handled by prepress); min/max sizes |
| Quantity | Minimum order quantity; ±5% overs/unders policy |
| Proofs & testing | Zero die or plate charges; free 2D vector dieline and 3D digital mockup before payment; physical prototypes and drop/crush testing available |
| Turnaround | 10–14 business days standard; 4–5 business days rush available |
| How boxes ship | Shipped knocked-down flat (KDF) in strapped bundles or palletized stacks with free shipping across all 50 US states |
Ready to quote double wall boxes? Compare up to 3 quantities with a free 3D mockup.
Request a Quote →What goes on each panel of a custom double wall box?
- 1Front & back long walls (Length)
High-impact brand logo, product silhouette illustration, and bold geometric color-blocks readable across warehouse aisles. - 2Left & right end walls (Width)
SKU part numbers, gross weight callouts, team-lift icons, and vertical orientation arrows visible when pallet-stacked end-out. - 3Top outer major flaps
Safe-unboxing instructions ('Do Not Cut Deep'), lift sequence diagrams, and 2-inch clearance on both sides of the center H-tape seam. - 4Interior top flaps & inner liner
Surprise brand accent flood print, assembly QR code, warranty registration card, or return repacking diagram. - 5Bottom outer major flap
Box Manufacturer's Certificate (BMC) stamp documenting double-wall 48/51+ ECT or Mullen burst compliance for carrier claims.
Double wall box design ideas
Example designs with made-up brands. Your box is made to your design.
What mistakes should I avoid when ordering custom double wall boxes?
Avoid split creases, popped tape seams, and tight interior cavities by steering clear of these five 5-ply corrugated mistakes. For buyers ordering branded double wall boxes, wholesale double wall boxes, bulk custom double wall boxes, personalized double wall boxes, custom size double wall boxes, double wall boxes with dual fluted mediums or corrugated double wall boxes, watch out for these common sizing and artwork mistakes
- Measuring outside parcel dimensions instead of usable inside Length × Width × Height, forgetting that two 7 mm BC double-wall sides add ~14 to 16 mm to width and four flap plies add ~28 mm to vertical height.
- Packing loose cast-iron pots, brake rotors, or glass bottles directly against bare inner walls without EPE foam end-caps, honeycomb pads, or 2-ply cell dividers to prevent internal impact collisions.
- Applying a single strip of thin clear plastic tape to 5-ply major flaps instead of reinforced water-activated paper H-tape that bonds permanently into kraft fibers against flap springback.
- Stacking double-wall cartons on their sides so the two fluted mediums run horizontally instead of vertically, sacrificing over half of their 48–51 ECT top-to-bottom pallet compression strength.
- Placing barcodes, fine text, or logos across the center top seam or within 2 inches of horizontal flap creases where wide reinforced H-tape covers the print.
Get a double wall dieline at your size
A simplified drawing for planning your design. Your free production dieline comes with your proof, made for your exact size and board.
Chat with a designer now
Share your logo, a sketch or an AI image. We'll rebuild every element cleanly onto your box dieline and send a 3D mockup, free.
Made your design with AI?
Generated a concept in Google Gemini, ChatGPT, Claude or Midjourney? Send us your AI image: we rebuild every element onto your box dieline and show you a 3D mockup before you pay, free.Custom vs stock double wall boxes: which is better?
| Stock (plain) boxes | Custom boxes from CubitPack | |
|---|---|---|
| Branding | Plain, or a label on the front | Your logo and colors, inside and out |
| Fit | Fixed sizes | Made to your exact size |
| Minimum | Any quantity | Confirmed with your quote; quote presets from 250 boxes |
| Lead time | Ships right away | 10–14 business days, rush 4–5 |
| Design | None | Free design help, proof and 3D mockup |
Get custom double wall boxes made to your exact size, with a free 3D mockup before you pay.
Request a Quote →Are double wall boxes eco-friendly?
Kraft and recycled board
Choose kraft or recycled board for a lower-impact box.FSC paper available
FSC paper and ISO 9001 production are available on request.Food-safe on request
For food, we make it in a certified partner facility. Certificates and lab tests on request.How do I order custom double wall boxes?
Tell us what you need
Size, quantities or AI conceptCompare volume pricing
Dedicated account managerApprove your proof
Digital proof + 3D mockupMade and shipped
Free to all 50 statesHow much do custom double wall boxes cost?
The price depends on four things, and every custom quote is free.
Size
Bigger packaging uses more materialQuantity
The unit price drops as you order moreMaterial
The board, film or paper you chooseFinishes
Foil, windows and lamination add costYour first order is 10% off, and we beat written quotes from US competitors for the same specs.
10% off your first order.
Request a Quote →What do I need to send for a quote?
- The product and how many you need
- The inside size, or what goes in it
- A style, or ask us to suggest one
- Your logo or artwork (an AI image is fine)
- Pantone codes, if you have them
- Delivery ZIP code and the date you need it
Can I see a sample first?
Sample kit
Board and finish swatches, sample boxes, labels and bags. Credited to your first order.Digital proof + 3D mockup
See it before you payPrinted sample
Of your own designHow do the boxes ship?
- Free shipping to all 50 states
- Worldwide with DDP prices: duties and taxes included
- Blind and split shipping
- Damaged in transit? We reprint the damaged units free
Why brands choose CubitPack
Dedicated specialist
One account manager from quote to deliveryPantone guaranteed
Clearly off? We reprintReprint or refund
If we get it wrong, you chooseBBB accredited
A US business you can checkDouble wall box questions
What is a custom double-wall corrugated box?
A custom double-wall corrugated box is a heavy-duty 5-ply shipping carton built from three flat linerboards sandwiching two arched fluted layers (such as BC-flute or EB-flute). That dual-flute beam delivers dramatically higher vertical stacking compression, side puncture resistance, and drop cushioning than a 3-ply single-wall box.
What is the difference between BC-flute and EB-flute double-wall board?
BC-flute (~9/32 in / 7.0 mm thick) pairs medium B-flute with coarse C-flute for maximum shock absorption and 48–51+ ECT pallet stacking strength on heavy 40–100+ lb shipments. EB-flute (~3/16 in / 4.6 mm thick) pairs fine E-flute outside with B-flute inside, giving you a smooth retail-grade print surface plus 5-ply puncture strength.
When should I upgrade from single-wall to double-wall shipping boxes?
Upgrade to double-wall corrugated board whenever your packed box exceeds 35–40 lb, holds dense metal or glass items with concentrated point loads, ships via LTL pallet freight stacked 4–6 cartons high, or travels internationally through humid ocean or air cargo hubs.
Can custom double-wall boxes be printed in full color inside and out?
Yes. Choose rugged 1–3 color direct flexo ink (including opaque white ink on brown kraft), digital CMYK, or offset litho-lamination with Pantone color matching, matte or gloss lamination, Spot UV, and metallic foil accents.
Do you make custom foam inserts or bottle dividers for double-wall cartons?
Yes. Select EPE foam insert, Honeycomb insert, or Card insert in Step 2 of the quote form. We engineer custom closed-cell EPE foam end-caps for electronics and auto parts, kraft honeycomb blocks for cookware, and interlocking 6- or 12-cell double-wall partitions for wine and spirits.
What is the minimum order quantity for custom double-wall boxes?
In our shared quote form you can select preset quantities starting at 250, 500, 1,000, 2,500, or 5,000+ boxes, and trial runs are reviewed case by case.
Are there any die or printing plate setup charges?
No. CubitPack charges zero die or plate fees on custom double-wall shipping boxes and includes free structural dieline prep, free artwork checks, and a 3D digital mockup before you pay.
What happens if cartons are damaged in transit on their way to us?
CubitPack provides a free reprint of boxes damaged in transit when reported with photos within 14 days of delivery, and our team handles the carrier claim for you.
Can we run drop and crush testing on a physical prototype before ordering?
Yes. We offer custom physical prototypes (priced per product), drop and crush testing for heavy payloads, and our $50 material & finish sample kit (credited toward your first production order).
How long does production take and how do double-wall boxes arrive?
Standard production takes 10–14 business days after proof approval and payment, with 4–5 business day rush available. Double-wall boxes ship knocked-down flat (KDF) in strapped bundles or palletized stacks with free shipping across all 50 US states.
Still have a question? Ask a packaging specialist.
Request a Quote →Parts of a double wall box
- 5-ply combined board
- Double-wall corrugated sheet made of outer liner + flute 1 + center liner + flute 2 + inner liner
- BC-flute (9/32 in)
- Heavy-duty double-wall combination pairing B-flute puncture resistance with C-flute cushioning (~7.0 mm thick)
- EB-flute (3/16 in)
- Print-friendly double-wall combination pairing smooth outer E-flute with sturdy inner B-flute (~4.6 mm thick)
- 48–51+ ECT
- High Edge Crush Test stacking grades certifying 48 to 51+ lb per linear inch of vertical wall compression resistance
- Flap springback
- The natural outward elastic force of thick 5-ply flaps when folded 180 degrees, secured cleanly with reinforced H-tape
- Full Overlap (FOL / 0203)
- Optional heavy-duty RSC variant where outer major flaps span the full box width to create 10-ply top and bottom armor
Other box styles
Learn more about double wall boxes
Get your double wall boxes price
One dedicated account manager prepares pricing across up to 3 quantities.
- Free design & AI-to-print studio + 3D mockup
- No die or plate charges · 4–5 day rush available
- Free shipping to all 50 states
- 10% off your first order
- Reprint or refund if we get it wrong
Five-ply double-wall corrugated architecture (BC-flute and EB-flute), 48–71 ECT and 275–350# Mullen ratings, FEFCO 0201 RSC and 0203 FOL flap geometry, 14 mm interior-to-exterior wall allowances, and reinforced H-taping standards were verified against Fibre Box Association (FBA) corrugated handbooks, FEFCO codes, and ISTA 3A/3B transit test procedures. A packaging specialist checked every specification against CubitPack offerings. Spot something wrong? Tell us and we fix it. Tell us if something looks wrong.
Sources
What changed
- November 5, 2026: Built full 38-block custom double wall boxes style page with FEFCO 0201 RSC dieline, verified FBA / FEFCO / ISTA 5-ply specs, 15 studio WebP images, and 3 companion guides.