Revised August 2026
Pre-Order Technical Notes
What we need to know before we make your glass - sizes, holes, cut-outs, edges, templates and delivery.
Please read these notes before ordering. Giving us the correct information helps us quote and manufacture accurately.
Toughening sizes
| Limit | Size |
|---|---|
| Smallest we can toughen | At least one side or length must be 250mm or longer |
| Largest we can toughen | 3210 × 2550mm - a full stock sheet |
If a pane is too small to toughen, we can suggest laminated glass or 6mm float glass depending on its intended use. The 250mm manufacturing limit is separate from the Building Regulations small-pane rule.
Minimum order value
Our minimum order value is £10.00 including VAT.
Tolerances
We work to +/-2mm on glass size, drill-hole locations and cut-out locations.
Toughening stamps
Arrissed-edge toughened glass will have a face stamp in the corner unless otherwise specified. Polished-edge glass 6mm and above will have a line-logo kite mark on the edge unless otherwise stated. Tell us before ordering if you need a different position or format; all toughened glass must carry a stamp.
Toughened laminated glass
Our bespoke toughened laminated glass uses an EVA interlayer. EVA offers greater transparency and moisture resistance than PVB, making it thermally and mechanically more stable and less likely to delaminate.
Polished edges and corners
We polish glass using straight-line edgers or our CNC; shaped items are generally CNC processed. Other edge finishes, including bull nose, are available on request. Polished corners are sharp as standard and can be dubbed or radiused if specified at order stage.
Drill holes
Hole positions can affect the success of toughening. These minimums apply:
| Rule | Minimum |
|---|---|
| Edge of glass to edge of hole | 1.5 × glass thickness |
| Hole in a corner | 4 × thickness from one edge and at least 1.5 × thickness from the other |
| Hole diameter | Not less than the glass thickness |
Worked examples
| Glass | Edge to hole | Corner (A/B) | Hole diameter |
|---|---|---|---|
| 6mm | 9mm | 24mm / 9mm | 6mm |
| 8mm | 12mm | 32mm / 12mm | 8mm |
| 10mm | 15mm | 40mm / 15mm | 10mm |
| 12mm | 18mm | 48mm / 18mm | 12mm |
| 15mm | 22.5mm | 60mm / 22.5mm | 15mm |
| 19mm | 28.5mm | 76mm / 28.5mm | 19mm |
Cut-outs
The minimum internal radius is 7mm for an arrissed finish and 14mm for a polished finish. Tell us which finish you require when ordering.
Back-painted glass
We recommend low-iron glass because clear float glass has an inherent green tinge. Low iron will be supplied unless otherwise stated. Provide a RAL, Dulux, Pantone, British Standard or other colour code; bespoke colours can be matched as closely as possible.
Templates and drawings
- Templates should be hardboard, cut to exact finished size, with holes and cut-outs correctly located.
- Our CAD team can convert suitable sketches into PDF and DXF production files.
- DWG or DXF production files are preferred where available.
Deliveries
We deliver using our own vehicles and drivers; we do not hand your glass to a courier. Deliveries are kerbside unless agreed otherwise, and the customer is responsible for unloading and moving the glass. Tell us about parking or unloading restrictions at quote stage. Delivery is priced by road distance, including applicable tolls, crossings and emissions charges.
| Destination | Delivery |
|---|---|
| UK mainland, including Scottish Highlands | Yes - priced on distance |
| Skye and Raasay | Yes - reachable by road |
| Isle of Wight | Yes - priced individually |
| Other ferry-only islands; Channel Islands; Isle of Man; Isles of Scilly; Northern Ireland; Republic of Ireland | Collection only |
Where we cannot deliver, collection is available and we can help you arrange a carrier.
Lead times
Processing failures and breakages can occur. Lead times are given in good faith, but delays cannot be ruled out. Bespoke shapes, notches, cut-outs, holes and templates require an agreed drawing or template before the lead time begins.
