A 40HQ container swallows 108,000 m² of 30 kN fiberglass geogrid. Pack the same container with 4,000 g/m² bentonite GCL and you get 6,660 m². Same box, same freight invoice — a sixteen-fold gap in how many square metres actually arrive at your site.
That gap is the most ignored number in geosynthetics buying. Buyers compare ex-works prices per square metre down to the third decimal, then treat ocean freight as a flat line someone else will sort out later. Geosynthetics punish that habit, because they’re an unusual kind of cargo: cheap per m², expensive per m³ — so how well a product loads into a container quietly decides a large slice of your landed cost.
We’re a sourcing team, and we build loading plans before we finalize quotes. The figures below come from our own loading tables, covering ten product families from geomembrane and geotextile to geogrid, GCL and geocell. Nobody else publishes these numbers, as far as we can tell. Here they are.
Cheap per m², expensive per m³: the math that sets your landed cost
The calculation is one division: your ocean freight per container, divided by the square metres inside it. That’s your freight cost per m² — and across geosynthetics it swings by a factor of sixteen.
Divide any freight quote by 108,000 m² and freight is a rounding error. Divide the same quote by 6,660 m² and freight becomes one of the biggest lines in your landed cost, sometimes bigger than the quality gap between two suppliers you spent a week comparing.
This is why we tell buyers: don’t compare ex-works quotes until you know how each product loads. A supplier who is 3% cheaper per m² but ships shorter rolls or a heavier spec than you need can hand you a worse landed price. The numbers below let you run that check yourself.
Geomembrane roll size and loading: 41 to 82 rolls in a 40HQ
The standard export HDPE geomembrane roll is 7 metres wide. The most common load we book is 1.0 mm smooth membrane: 7 m × 100 m per roll, about 658 kg each. A 40HQ takes 41 of those rolls — 28,700 m², grossing 26,978 kg.
Notice that weight: just under 27 tonnes, where road limits put a loaded 40HQ on most lanes. Geomembrane containers weigh out, not cube out — and that means thickness controls everything:
| Thickness | m² per 40HQ | Roll picture |
|---|---|---|
| 0.5 mm | ~57,400 m² | up to 82 rolls, 7 m wide |
| 1.0 mm | 28,700 m² | 41 rolls × 7 m × 100 m, 658 kg each |
| 2.0 mm | ~14,350 m² | fewer, shorter, heavier rolls |
Every one of those combinations grosses roughly the same 27 tonnes. Thickness just decides how many square metres that weight buys you. Go from 1.0 mm to 2.0 mm and your freight per m² doubles; drop to 0.5 mm and it halves. So when an engineer “rounds up” the membrane spec for comfort, the invoice pain isn’t only the resin — it’s every container from the factory gate to your site carrying half the area.
Geotextile: around 32,000 m² per container — if you know the spec
Geotextile looks simple until you ask what’s actually on the roll. Our reference load for nonwoven geotextile is 270 g/m² heat-bonded PP: about 32,000 m² in a 40HQ.
At the light end, a 90–100 g virgin-material geotextile ships as 350-metre rolls with an 800 mm diameter. Those two figures — roll length and diameter — are what you should be asking every supplier for, because they determine the stow plan and how many joints your installation crew deals with on site. Two quotes for “200 g nonwoven” can hide very different roll lengths, and the shorter-roll offer means more roll changes and more overlap waste that never shows up on the price sheet.
Our rule: a geotextile quote without roll length, width and diameter isn’t a quote yet — it’s a price per m² floating in space.
Geogrid: a seven-fold spread inside one product family
Geogrid is where the container math gets dramatic, because “geogrid” covers everything from a light soil-stabilization mesh to heavy reinforcement for retaining walls — and they load completely differently.
From our loading tables: a biaxial plastic geogrid at 15/15 kN loads about 67,200 m² into a 40HQ. The same product family at 50/50 kN loads about 9,600 m². That’s a seven-fold spread — same supplier, same production line, same container. And fiberglass geogrid at 30 kN, which packs flat and dense, reaches 108,000 m², the best loader in the entire geosynthetics catalogue.
The practical read: on light grids, freight per m² barely matters, so chase product price. On heavy grids, freight per m² is real money, so a nearby-port supplier or a smarter stow can outweigh a small ex-works discount. Buyers who apply one mental freight rate to “geogrid” get both decisions wrong.
GCL: the one product where weight always wins
Bentonite GCL is the heavyweight of the family, literally. A 4,000 g/m² GCL roll weighs about 720 kg. A 40HQ takes 37 rolls — 6,660 m², grossing around 26.6 tonnes. Every single GCL container presses right up against the ~27-tonne legal limit before the box is anywhere near full.
Two consequences. First, GCL carries the highest freight per m² of any mainstream geosynthetic — budget for it, don’t discover it. Second, container counts on GCL projects are brutally simple: take your lined area, divide by 6,660, round up. A 100,000 m² landfill cell means fifteen-plus containers of GCL alone, and your freight negotiation should start from that volume.
Two other products sit at the opposite end. Geocell folds flat: palletized, a 40HQ carries roughly 43,000 m². And polypropylene fibre for concrete ships in bags at about 22 tonnes per container. Both load efficiently — freight per unit is close to negligible.
The smart first container: membrane, geotextile and a welder in one box
Here’s the mixed-load trick we recommend to almost every buyer starting a lining project. Don’t ship the geomembrane alone. Combine three things in the first 40HQ: the membrane rolls floor-loaded, the protection geotextile (the cushion layer that goes under and over the membrane) stacked above, and a crated geomembrane welding machine secured at the door end.
Why it works: the welder on its own is an awkward, expensive LCL shipment, and the cushion geotextile is light enough to ride on top of membrane rolls without eating your weight allowance. One box, one customs entry, and the day it clears, your crew can unroll, cushion and weld — instead of standing around waiting for a second shipment. We handle the stow plan and the equipment shipping side as one booking, and on a typical project start this saves both weeks and a second round of freight and clearance charges.
FAQ
How many rolls of geomembrane fit in a 40HQ container? For 1.0 mm HDPE membrane in standard 7 m × 100 m rolls (about 658 kg each), 41 rolls fit — 28,700 m² at a gross weight of 26,978 kg. Thinner membrane loads up to 82 rolls and about 57,400 m² at 0.5 mm; 2.0 mm drops to roughly 14,350 m². Total weight stays near 27 tonnes in every case.
How much geotextile fits in a 40ft high-cube? Around 32,000 m² for a 270 g/m² heat-bonded PP nonwoven. Lightweight 90–100 g virgin-material geotextile ships as 350 m rolls with an 800 mm diameter. The exact figure moves with grammage and roll length, so always ask for the roll dimensions behind the quote.
Why does GCL need so many containers? Because it weighs out long before it fills the box. At 4,000 g/m², 37 rolls of 720 kg each hit about 26.6 tonnes — the practical road limit — at only 6,660 m². Divide your lined area by 6,660 and you have your GCL container count.
Can I mix different geosynthetics in one container? Yes, and for a project start you usually should. Membrane on the floor, protection geotextile on top, welding machine at the door is the classic combination: one booking, one clearance, and everything the crew needs to start welding on day one.
What this means for your next order
Before you sign anything, do three things. Freeze the spec — thickness, grammage and strength class set your container count more than any discount will. Get the loading plan in writing — rolls per container, roll dimensions, gross weight. Then divide your freight quote by the m² per box and compare suppliers on landed cost, not ex-works price.
Or hand us the bill of quantities and let us run it. We’ll come back with the container count, the stow plan and the landed cost per square metre — for the membrane, the geotextile, the grid and the machine that welds it all together. Start with our geosynthetics sourcing hub and tell us what you’re building.
Need Professional Sourcing?
Stop guessing. Let Xilink verify your suppliers and negotiate the best rates.
Start Your Project