Approximate Weight of Flat and Laminated Glass 

Excerpted from NGA Glass Technical Paper FB23-25 Approximate Weight of Architectural Flat and Laminated Glass. Download the complete document free at glass.org/store. 

Design professionals, wall system manufacturers and construction managers often need the weight of materials for engineering and construction site considerations. Table 1 provides approximate weights of architectural flat glass by thickness designations as published by North American manufacturers. 

Approximate weights do not apply to patterned glass or products incorporating multiple lites of glass fabricated into an assembled product. Additional glass thicknesses are available. Consult individual manufacturers for detailed product availability. Also, ASTM C1036 Standard Specification for Flat Glass addresses quality requirements. If the exact thickness is known, the exact weight may be calculated using a glass density of 156 pounds per cubic foot (2,500 kilograms per cubic meter). 

Table 2 provides approximate weights of interlayer used in laminated architectural flat glass by North American manufacturers. Consult individual manufacturers for detailed product availability. ASTM C1172 Standard Specification for Laminated Architectural Flat Glass also addresses quality requirements for laminated glass units. 

To calculate the approximate weight of a laminated product, add the weight of the interlayer thickness from Table 2 to the weights of the inner and outer lites of glass from Table 1. For example, for a ³⁄₃₂-inch glass plus 0.035 Ionomer interlayer plus ³⁄₃₂-inch glass makeup, add 1.2 plus 0.17 plus 1.2 to equal 2.57 pounds.