The Weight of Double and Triple Glass Units




The weight of glass plays a big factor in architectural glazing. It is an important factor when determining what type of hardware and frame profile is required for windows and doors. It also plays an important role in determining the number of installers and appropriate equipment required to lift glass into its frame or if a crane is required.

The weights are approximate, based on nominal glass thickness. Glass type doesnt effect the glass weight.  Annealed and toughened glass has the same weight and laminated glass including extra layer weight. 

The basic formula to calculate the weight of glass is as follows:

Glass weight (kg) = Glass area (m2) x Glass thickness (mm) x Factor (2.5)

Area of glass is calculated as height (m) x width (m)

If we can calculate the weight of 2mm annealed glass pane per sqm; 

Glass weight = 1 m2 x 2 x 2.5 = 5 kg/m2

Glass thicknessGlass weight
2 mm5 kg/m2
4 mm10 kg/m2
5 mm12.5 kg/m2
6 mm15 kg/m2
8 mm20 kg/m2
10 mm25 kg/m2
12 mm30 kg/m2
15 mm37.5 kg/m2
19 mm47.5 kg/m2

Weight of double glazed units

The thickness of some typical double glass are as follows:  

  • Double glass, 4/20/4mm : 20 kg/m2
  • Double glass, 6/16/6mm : 30 kg/m2
  • Double glass, 8/16/8mm : 40 kg/m2
  • Laminated double glass, 6/16/8.8mm: 35 kg/m2

Weight of triple glazed units 

The thickness of some typical triple glass are as follows:  

  • Triple glass, 4/14/4/14/4mm : 30 kg/m2
  • Triple glass, 6/12/6/12/6mm : 45 kg/m2


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