- Project plans
- Project activities
- Legislation and standards
- Industry context
- Specialist wikis
Last edited 14 Feb 2021
Laminated glass (sometimes called toughened laminated glass) comprises two or more layers of glass sandwiched together with tear-resistant plastic film interlayers (usually polyvinyl butyral (PVB) or ethylene-vinyl acetate (EVA). The aim is to create a glass composite which can absorb the energy of a person or object that strikes it, preventing penetration of the pane and potential injuries that might result from flying fragments of broken glass.
Laminated glass can be used for safety or security reasons. It is used for architectural applications where for example, the glass could fall from a height and shatter, and also for roof, balcony and terrace balustrading, as well as for skylights. It can also be used as a decorative material due to the wide variety of interlayers available, e.g coloured, textured, meshed or patterned. It is particularly useful for windows and shopfronts in areas prone to hurricanes.
Manufacture can involve using heat-strengthened glass, which, when it breaks, does so into large pieces held in the frame by the PVB inter-layer. Or it can be made from tempered glass, where the sheet may fall out of the frame but will mostly stay together due to the interlayer.
Laminated glass is available in various thicknesses and configurations. A typical glass-layers configuration can comprise 2.5mm glass – 0.38mm interlayer – 2.5mm glass, resulting in ‘5.38 laminated glass’.
 Double laminate:
- 6mm - int - 6mm.
- 8mm - int - 8mm.
- 10mm - int - 10mm.
 Triple laminate:
- 6mm - int - 6mm - int -6mm.
- 8mm - int - 8mm - int -8mm.
- 10mm - int - 10mm - int -10mm.
The cockpit of an aircraft such as a Boeing 747 may include a triple-laminated glass construction comprising three layers of 4mm toughened glass with 2.6mm PVB layers in between, making a total glass thickness of 17.2mm.
 Related articles on Designing Buildings Wiki
- BFRC window rating scheme.
- BREEAM Visual comfort View out.
- Curved glass.
- Daylit space.
- Domestic windows.
- Double glazing.
- Float glass process.
- Low-E glass.
- Patent glazing.
- Preventing overheating.
- Rights to light.
- Safety glass.
- Secondary glazing.
- Security glazing.
- Structural glass assembly.
- Suction lifter.
- Types of window.
Featured articles and news
LETI publishes guidance for energy efficient home retrofits.
Predictions about adequate post-pandemic IAQ in non-domestic buildings.
Government publishes plans to 'build back greener'.
The contentious nature of claims associated with cladding, fire safety and EWS1 forms.
ECA comments on low-carbon heating systems initiative and Heat and Buildings Strategy.
Cinders and other forms of domestic rubbish created filth but also generated great wealth.
CIC 2050 Group requests input to find out priorities for future industry leaders.
IHBC publishes response to consultation.
Institute applauds funding initiatives but presses for additional retrofit and tax measures.