Clear float glass is a flat, transparent glass made by forming molten glass on a bath of molten metal. For B2B buyers, the right choice depends on more than appearance: thickness, sheet size, edge requirements, processing, intended use, and applicable safety codes all need to be confirmed. Standard annealed clear float glass is not automatically safety glass, insulated glass, or a finished window product. This guide explains how to define your requirements and prepare a clear, comparable supplier inquiry.
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This guide is intended for importers, glass processors, façade contractors, window and door manufacturers, distributors, and project procurement teams. It is useful when you are comparing clear float glass suppliers or turning an initial design into a purchase specification. If your project needs a finished safety-glazing assembly, use this guide to define the base glass, then confirm the complete assembly requirements with your design team and supplier.
Clear float glass is made by floating molten glass on a molten tin bath, then cooling it under controlled conditions. The process produces a flat surface and relatively uniform thickness, making the material suitable for cutting and additional processing. “Clear” describes the glass’s visual appearance; it does not mean the glass is invisible or free from all color, optical distortion, or manufacturing variation.
In its annealed form, clear float glass is a basic product rather than a complete safety solution. It can be cut, polished, drilled, coated, tempered, laminated, or incorporated into an insulating glass unit, subject to product dimensions and processing requirements. These treatments change the product’s properties and should be stated separately in your inquiry.
Clear float glass is sold in a range of thicknesses, with availability depending on the manufacturer, market, and order requirements. Common nominal options include 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, and 12 mm; treat these as examples rather than a guarantee of stock or suitability. A thicker sheet is generally heavier and may offer greater resistance to bending, but the required thickness must be determined for the actual panel size, support, loads, and local rules.
As a planning estimate, glass with a density of approximately 2,500 kg/m³ weighs about 15 kg/m² at 6 mm thickness. This is a calculation based on nominal thickness and density, not a shipping weight for a packaged order. Ask the supplier to confirm the product’s declared dimensions and weight basis when calculating handling, transport, and installation needs.
Specify sheet length and width in millimetres, and identify whether you require jumbo sheets, stock sizes, or cut-to-size pieces. Confirm the applicable dimensional and thickness tolerances in the quotation or technical documentation; these can depend on the product standard and supplier. If the glass will be processed, clarify whether it will arrive as a raw sheet or as a finished component.
State any requirements for edge finish, holes, notches, corners, or surface treatment. For example, polished edges and drilled holes must be coordinated with the final drawing and processing sequence. Also identify any expectations for visual quality, including how inspection should be carried out and what acceptance criteria apply.
Clear float glass typically transmits visible light, but its appearance and light transmission can vary with thickness, composition, and processing. If the project has a specific optical target, ask for the relevant product data rather than assuming all clear glass performs identically. Where a safety glazing requirement applies, specify the required finished glass type and standard for the project market.
Annealed float glass can break into sharp pieces, so it should not be assumed suitable for every door, overhead, impact-prone, or human-contact location. Depending on the application and local code, the design may call for tempered glass, laminated glass, or another tested assembly. Confirm requirements with the project designer or code authority before ordering.
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| Application | Typical role of clear float glass | What to confirm |
|---|---|---|
| Windows and façades | Base material for further fabrication or glazing assemblies | Panel size, wind and structural design, safety requirements, and whether insulated or coated glass is needed |
| Interior partitions | Transparent separation in offices or commercial interiors | Impact exposure, edge treatment, fixing method, and applicable safety glazing rules |
| Furniture and shelving | Glass panels, shelves, tabletops, or cabinet components | Supported span, load, edgework, holes, and whether tempered glass is required |
| Glass processing | Feedstock for cutting, tempering, laminating, or coating | Sheet dimensions, process compatibility, surface condition, and yield requirements |
These are application categories, not engineering approvals. The finished design must account for panel size, support, loads, temperature conditions, and applicable regulations. When float glass is being used as a processing input, share the processor’s requirements before purchase so the selected sheet format and quality criteria align with the next production step.
Start with the product’s function and installation location. Record whether the glass is for an exterior opening, an internal partition, furniture, or factory processing. Note exposure to people, impact, weather, heat, or overhead positioning, as these conditions may rule out annealed glass as the final product.
List the nominal thickness, sheet or finished-piece dimensions, quantity, edge finish, holes, notches, and any coating or further processing. Include drawings where the shape or cut-outs are not rectangular. Identify the applicable quality or safety standard by name and market, and request confirmation that the offered product meets the stated requirement.
Ask each supplier to quote the same product condition and scope so that prices are comparable. Confirm minimum order quantity, available sheet sizes, packaging, shipment terms, production or dispatch schedule, and whether the offer includes export packing. Lead time and MOQ are order-specific; request them in writing rather than relying on general estimates.
For a repeat or large-volume order, agree on how samples or pre-production pieces will be reviewed. Ask what technical data, inspection records, packing details, and shipment documents the supplier can provide for the specific order. Make acceptance criteria explicit before production, especially for visible applications or glass that will undergo further processing.
The price of clear float glass depends on factors such as thickness, sheet format, quantity, processing, packaging, and delivery destination. Cut-to-size or processed orders may have different cost and yield considerations from standard sheets. Currency, freight, and trade terms also affect the landed cost, so compare quotations on a consistent basis.
There is no single MOQ or lead time that applies to every order. Stock availability, production planning, custom dimensions, and export arrangements can all influence the schedule. To obtain a useful quotation, send the supplier your dimensions, thickness, quantity, destination, required processing, and target delivery window.
Shanglin Glass supports B2B buyers sourcing clear float glass for building-glass projects and further processing. To help us assess your request, provide the intended application, thickness, dimensions, quantity, destination, required processing, and any project standards or drawings. We can then review the stated requirements and discuss a quotation, available product options, and order-specific supply details.
Choose clear float glass by starting with its end use, then matching thickness, dimensions, finish, processing, and safety requirements to the project. Standard annealed glass can be a suitable base for many products, but it is not automatically appropriate as final glazing in every location. Confirm code and design requirements before ordering, and compare suppliers using the same written specification. For a practical next step, send Shanglin Glass your drawings or dimensions, quantity, destination, and required delivery timing to begin a focused B2B inquiry.
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