sizes and weights

T he maximum size sealed unit we will make is 3.5m ².  Units above this size are available subject to the constraints laid down below.  They have however, to be brought in and will be subject to longer lead times and carry a surcharge - please check before ordering. 

T oughened glass needs to be specified in certain "critical locations" - please check with current legislation.  The minimum size that can be toughened is 250mm x 150mm.

W hether a sealed unit is annealed or toughened, maximum sizes apply:

4mm Thickness

Maximum larger dimension 2440mm
Maximum smaller dimension 1300mm
Anything above these sizes will be made in 6mm
For Example, A unit 1301 x 1301 will be made in 6mm.

6 mm Thickness

Maximum larger dimension 3210mm
Maximum smaller dimension 1750mm
Anything above these sizes can possibly be made in laminated, but
would be treated as a special order.  Please check before ordering.

The Weight of Glass and Sealed Units

Thickness (mm)

Glass Weight (kg/m2)

Single Glazing  
4mm 10
6mm 15
8mm 20
10mm 25
12mm 30
Sealed Units  
4mm / 12 / 4mm 22
4mm / 12 / 6mm 27
6mm / 12 / 6mm 32
6.4mm / 12 / 4mm 27
10mm / 12 / 6mm 42