Before placing your first glass order, confirm the product specification, dimensions, processing, quantity, packaging, delivery terms, quality requirements, and payment conditions in writing. Send your supplier a current drawing or specification sheet, and ask them to confirm that every detail is understood before production begins. I recommend resolving open questions about tolerances, edgework, safety requirements, and packaging before approving the order—not after the glass is made. A clear, jointly reviewed order document helps reduce avoidable misunderstandings and gives both sides a reference for production and inspection.
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Use the points below as a practical checklist, then request a written confirmation or pro forma invoice that matches your approved requirements. If something is not applicable, mark it as such rather than leaving a blank that could be interpreted in different ways.
Start by explaining where and how the glass will be used. A façade infill, interior partition, furniture panel, and display case may require different material choices and processing, even when their dimensions appear similar. Share the project location and any relevant design or building requirements so the supplier can identify questions that need clarification.
Confirm whether you need float glass, tempered glass, laminated glass, insulating glass, coated glass, or another configuration. These terms describe different products and functions, so do not rely on a broad description such as “clear glass” when the project requires a particular construction or treatment. If you are uncertain, describe the application and ask the supplier to clarify available options; have the final selection approved by the project’s designer or responsible technical professional where required.
For example, a request might identify an illustrative single pane of 6 mm clear float glass, but that description alone does not establish whether the glass is suitable for a specific building application. The required safety performance, local regulations, support conditions, and installation details may affect the correct specification. Treat examples as a starting point, not as a substitute for project review.
Send dimensions in a consistent unit and state whether they refer to the finished glass size or the opening size. A drawing should identify width, height, orientation, and any shape details clearly. For example, an illustrative panel could be specified as 1,200 × 2,400 mm, with the drawing indicating which side is the width and where the finished edges will sit.
Confirm nominal thickness and ask the supplier to state the applicable dimensional and thickness tolerances in the quotation or order confirmation. Do not assume that a tolerance is understood because it is customary in your market; it should be agreed for the product and processing requested. If a panel must fit a frame or hardware system, provide the relevant interface details and confirm who is responsible for checking the fit.
Give each drawing a revision number and date, and identify the version approved for production. If you send a revised file, explicitly state which earlier version it replaces. This simple document-control step can prevent a supplier from working from a superseded drawing, especially when a project includes many panel sizes or repeated design changes.
List every operation required after the glass is made, including edge finishing, holes, cut-outs, notches, drilling, polishing, tempering, lamination, coating, or printing. For each feature, provide dimensions and positions on a drawing rather than relying only on an email description. State whether edges are exposed, concealed, or captured in a frame, because the finish may depend on how the glass will be installed.
Describe visual expectations as specifically as possible. Confirm the color or tint, surface orientation, coating position where relevant, and any acceptable limits for visible marks or appearance variation. Ask the supplier to explain the inspection criteria they can apply and how visual checks will be conducted; avoid assuming that different parties use identical acceptance standards.
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State the order quantity in pieces and provide a size schedule when the order contains multiple dimensions. Clarify whether the quoted quantity is the required quantity, an estimated quantity, or a quantity that includes agreed spare pieces. For a mixed-size order, ask the supplier to confirm the schedule line by line so that totals and product descriptions can be checked before production.
Discuss packaging before confirming the order, especially if the glass will travel a long distance or be unloaded at a constrained site. Ask how products will be separated, protected, labeled, and arranged for handling, and confirm whether the packing method suits your receiving equipment and storage conditions. Also identify the delivery address, unloading responsibility, shipment terms, and the documents needed for receipt or customs clearance.
Request an estimated production and shipping schedule in calendar days or business days, and ask when the schedule begins—for example, after drawing approval, deposit receipt, or another agreed milestone. Confirm whether production time and transit time are shown separately. These details make the schedule easier to plan around without treating an estimate as a guaranteed arrival date.
Agree on what will be checked before shipment and what information will accompany the order. Depending on the product and project, the parties may need to confirm dimensions, processing locations, appearance, labels, packing lists, or other agreed records. If a particular certificate, test report, or compliance document is required, name it precisely and confirm availability before placing the order.
Set a practical procedure for reporting damage, shortages, or specification concerns. Clarify what evidence is needed, who should be contacted, and the timeframe for reporting an issue under the agreed commercial terms. Keep the approved drawing, order confirmation, inspection notes, packing details, and shipment documents together so the order can be checked against the same reference.
Check what the quoted price includes and excludes. Confirm the product specification, processing, packaging, shipping basis, currency, payment schedule, and any charges that could apply if the order changes. Compare quotations on the same specification and delivery basis; a lower price for a different glass build or packing scope is not a like-for-like comparison.
Ask how changes are handled after approval. A revised size, additional processing step, or quantity change may affect cost and schedule, so request written confirmation of the impact before authorizing the change. Also confirm the process for final order approval, including who on your team is authorized to release the order for production.
At Shanglin Glass, we recommend sharing the application, glass build, finished dimensions, processing details, quantity schedule, and destination as early as possible. Our team can review the information provided, clarify questions about the requested building glass, and prepare an order confirmation for your review. Any project-specific compliance or performance requirement should be stated explicitly so its availability and documentation can be discussed before the order is finalized.
If you are still comparing product options, send the project requirements and mark any undecided items clearly. This gives the supplier an opportunity to identify missing information before it becomes a production issue. For a first purchase, you can also ask whether a sample or pre-production confirmation is appropriate for the product and project, and agree on its scope before proceeding.
Before your first glass order, confirm exactly what is being supplied, how it will be processed, how acceptance will be assessed, and how it will reach its destination. Review the final drawing, specification, quantity schedule, quotation, and delivery terms together, then provide written approval of the current version. Your next step is to prepare that information and ask your supplier to return a written confirmation that matches it. If you would like to discuss a building glass requirement with Shanglin Glass, share your drawings, application, quantity, and destination for a focused quotation discussion.
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