Glass · Weight
Double and triple glazing weight
An insulating glass unit weighs its panes; the cavity weighs practically nothing, air or argon. So 4-16-4 is 20.0 kg/m² and 6-16-6 is 30.0 kg/m², whatever the cavity width. The spacer and sealant add a little the figures leave out.
The weights
| Unit | Glass | kg/m² | lb/ft² | Door 900 × 2100 | Window 1200 × 1200 |
|---|---|---|---|---|---|
| 4-16-4 | 8 mm | 20.0 | 4.10 | 37.8 kg | 28.8 kg |
| 4-16-6 | 10 mm | 25.0 | 5.12 | 47.3 kg | 36.0 kg |
| 6-16-6 | 12 mm | 30.0 | 6.14 | 56.7 kg | 43.2 kg |
| 6-16-8 | 14 mm | 35.0 | 7.17 | 66.2 kg | 50.4 kg |
| 8-16-8 | 16 mm | 40.0 | 8.19 | 75.6 kg | 57.6 kg |
| 4-16-4-16-4 (triple) | 12 mm | 30.0 | 6.14 | 56.7 kg | 43.2 kg |
| 4-16-4-16-6 (triple) | 14 mm | 35.0 | 7.17 | 66.2 kg | 50.4 kg |
| 6-16-4-16-6 (triple) | 16 mm | 40.0 | 8.19 | 75.6 kg | 57.6 kg |
The width of the cavity (12, 16, 20 mm) does not change the weight. With a laminated pane in the unit, add its interlayer: see laminated glass weight.
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
Laminated · 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 a 4-16-4 double glazed unit weigh?
- 20.0 kg per square metre: the two 4 mm panes. The 16 mm cavity weighs practically nothing.
- Does argon make double glazing heavier?
- Not noticeably: the gas in the cavity weighs a few grams per square metre.