A casement window is a hinged sash that swings open on side hinges — not a fixed pane, and not a sliding leaf that rides on a track. That single difference changes almost everything about how the unit must be protected on a long ocean crossing. If you have only ever imported sliding doors or fixed glass, do not assume the same crate and the same loading plan will carry a casement. The hinge, the operator, and the exposed handle are all hardware that projects out of the frame, and the corner where the sash meets the frame is a structural joint that takes real load during transit. This guide walks through what a buyer should ask for, what good packing actually looks like, and the spots where casements specifically go wrong in export.
In an outward-opening casement the sash is pinned to the frame by hinges and swung open like a door. The frame stays fixed in the wall; the leaf moves. For shipping that produces three physical facts worth writing down before you order:
A windows catalog from a china casement glass window factory will list outward-opening systems with multi-chamber thermal break profiles and rated performance, but the listing tells you nothing about how the unit behaves inside a stack of crates. The geometry, not the marketing, is what the packing engineer has to solve.
Sliding leaves ride inside a track with the hardware mostly hidden in the profile. A casement's hinge and handle are on the outside of the sash. In a stacked crate, an unbagged handle or an operator arm can catch the next unit and bend. Good packers lock the sash in the closed position with transport screws, bag the hardware, and pad the projection points so nothing can snag during handling.
A fixed or sliding panel can be laid flat and stacked face to face with simple interleaving. A casement, if shipped loose, would swing. It must either be secured in the closed position or, on large projects, crated in a braced open position. Either way the hinge line is a pivot that has to be immobilised, not ignored.
The corners of an aluminium window are where the profiles are joined. In transit, stack weight and vibration concentrate at those corners. This is exactly why construction quality matters before the crate is even built. ALPES uses a full glue-injection process with integrated glued corner brackets on its casement lines such as the C113, producing a seamless monolithic corner rather than a mechanically pinned one. That rigidity is the first line of defence against a corner that walks out of square during shipping.
| Trait | Casement (hinged) | Sliding (track) |
|---|---|---|
| Hardware exposure | Proud hinges and handles; must be bagged and padded | Recessed in the track; lower profile |
| Sash behaviour | Swings; must be locked closed | Rides in the track; stacks flat |
| Weak point | Corner joints at the hinge load line | Corner joints, with lower cantilever load |
| Packing focus | Immobilise the hinge; pad the projections | Protect the track face; interleave panels |
A proper export pack for a casement window is a layered system, not a cardboard box:
Hardware should be bagged and the sash locked with transport screws so nothing moves inside the carton. The frame-to-sash joint should be supported, not left to float. A casement window company that ships in full containers will usually show you a pack photo before loading; ask for it.
Once packed, casement cartons load like any rigid aluminium unit: stood on edge or laid face down, braced so the stack cannot shift, with dunnage filling every gap. The maths that decides how many fit is simple in form and hard in practice — the cubic volume of each packed carton times the count must stay under the container's internal volume, and the gross weight must stay under its payload limit. Because casement sashes are bulky but not heavy per unit, volume rather than weight is usually the constraint for a villa or distributor first order. The exact number depends on the model's packed dimensions, so it should be confirmed against your bill of quantities rather than guessed. Container internal dimensions and payload are standard ISO values and vary slightly by carrier and box age.
Export paperwork for aluminium windows typically includes a commercial invoice, a packing list, a bill of lading, a certificate of origin where preferential duty applies, and cargo insurance. Wooden crates must carry the IPPC mark. Aluminium windows and doors clear under HS heading 7610; the actual customs entry is usually handled by your broker at the destination port, not the factory. Confirm with your forwarder which documents your market requires before the container sails.
Most transit damage is discovered too late, after the crate is opened and signed for. The discipline that prevents disputes is to photograph before you accept:
If a corner is out of square or a handle is bent, it is a packing or handling claim, and the photo timestamp is your evidence. Keep the carton until the claim is closed.
Do not let shipping be the silent line item. Ask the supplier, in writing:
A supplier that answers these plainly is one you can plan a project around. One that waves them away is one to treat with caution.
Buying direct from a manufacturer with its own production base removes the trading-company margin and puts the packing and loading decisions in the hands of the people who built the window. ALPES operates a 100,000-square-metre manufacturing base across Foshan and Zhaoqing in Guangdong, exporting full containers to villa and residential projects in the Middle East, Australia, and beyond. For a buyer, that means one accountable party from profile to packed crate — which is exactly what you want when the question is not "will it arrive" but "who fixes it if it does not."
No two casement projects ship the same way. The sash size, the glass configuration, the hardware brand, and the destination port all move the answer. The constants are these: immobilise the hinge, protect the corners, bag the hardware, photograph before you sign, and confirm the packed dimensions against your own container plan. Treat those as non-negotiable, and the ocean becomes a manageable line item rather than a gamble.
