Glass · Weight
Laminated glass weight
Laminated glass weighs the glass plus the interlayer: 2.5 kg/m² for every millimetre of glass and about 1 kg/m² for every millimetre of PVB (density 1070 kg/m³). So 4+4 with 0.76 mm PVB (8.76 mm) is 20.8 kg/m².
The weights
| Make-up | Total | kg/m² | lb/ft² | Door 900 × 2100 | Window 1200 × 1200 |
|---|---|---|---|---|---|
| 3 + 3 mm, PVB 0.38 mm | 6.38 mm | 15.4 | 3.16 | 29.1 kg | 22.2 kg |
| 4 + 4 mm, PVB 0.38 mm | 8.38 mm | 20.4 | 4.18 | 38.6 kg | 29.4 kg |
| 4 + 4 mm, PVB 0.76 mm | 8.76 mm | 20.8 | 4.26 | 39.3 kg | 30.0 kg |
| 5 + 5 mm, PVB 0.76 mm | 10.76 mm | 25.8 | 5.29 | 48.8 kg | 37.2 kg |
| 6 + 6 mm, PVB 0.76 mm | 12.76 mm | 30.8 | 6.31 | 58.2 kg | 44.4 kg |
| 6 + 6 mm, PVB 1.52 mm | 13.52 mm | 31.6 | 6.48 | 59.8 kg | 45.5 kg |
| 8 + 8 mm, PVB 0.76 mm | 16.76 mm | 40.8 | 8.36 | 77.1 kg | 58.8 kg |
| 8 + 8 mm, PVB 1.52 mm | 17.52 mm | 41.6 | 8.53 | 78.7 kg | 59.9 kg |
| 10 + 10 mm, PVB 0.76 mm | 20.76 mm | 50.8 | 10.41 | 96.0 kg | 73.2 kg |
| 12 + 12 mm, PVB 0.76 mm | 24.76 mm | 60.8 | 12.46 | 114.9 kg | 87.6 kg |
Every figure is the calculator's. The door and the window are monolithic sizes for comparison; your own size and make-up go in the calculator.
More glass weights
Double glazing · Toughened · By thickness: 3 mm · 4 mm · 5 mm · 6 mm · 8 mm · 10 mm · 12 mm · 15 mm · 19 mm · 25 mm
Questions people ask
- How much does 4+4 laminated glass weigh per square metre?
- With a 0.76 mm PVB interlayer (8.76 mm in all), 20.8 kg/m²: 20.0 kg of glass and the rest is the interlayer.
- Does the PVB interlayer add much weight?
- Little: its density is 1070 kg/m³, so 0.76 mm of PVB adds less than 1 kg per square metre.