Safety glass is the umbrella term for glass made to protect people better if it fails. In Switzerland you mainly encounter two types: ESG and VSG. ESG is thermally toughened, making it more resistant to impact and temperature changes; when it breaks it crumbles into blunt granules instead of sharp shards. VSG consists of two or more panes bonded with a tear-resistant plastic interlayer (usually PVB) – if the glass breaks, the fragments stick to the film.\n\nThe right choice depends on the application. ESG excels where mechanical or thermal stress dominates, such as shower partitions or glass doors. VSG is required wherever falling through or falling debris must be prevented – overhead glazing, all-glass balustrades, or floor-to-ceiling windows. VSG also offers better sound insulation and UV reduction and can be made burglar-resistant.\n\nSafety glass is needed anywhere people can come into contact with glass: doors, balconies, stairs, wet rooms and large window areas. In many cases standards (such as SIA guidelines) prescribe the appropriate type of glass.\n\nPay attention to the marking and make sure the glass type suits the actual situation. A common mistake is using ESG where VSG with residual load capacity would be needed. Have the glass type, thickness and approval confirmed in writing.
Safety glass (ESG/VSG)
Safety glass is specially treated glass that poses far less injury risk when it breaks than ordinary window glass. The two common types are ESG (toughened safety glass), which shatters into small, blunt granules, and VSG (laminated safety glass), which holds together even when broken thanks to a tough interlayer.
Example
A family in Winterthur is renovating their bathroom and wants a walk-in shower with a glass partition. The glazier recommends ESG because it withstands moisture and temperature differences and, in the rare event of breakage, produces only blunt granules. For the large floor-to-ceiling window in the adjoining bedroom, however, he advises VSG so that no one can fall through the pane. The exact cost depends on the type of glass, size, thickness and installation and is quoted in advance.
Frequently asked
What is the difference between ESG and VSG?
ESG (toughened safety glass) is thermally pre-stressed and crumbles into small, blunt granules when it breaks. VSG (laminated safety glass) consists of several panes with a tough interlayer and holds together when broken. ESG protects against cut injuries, while VSG also prevents falling through and offers more sound and burglary protection.
When is safety glass mandatory?
It is often required for glass doors, all-glass balustrades, overhead glazing, floor-to-ceiling windows and in wet rooms. The relevant standards and the specific installation situation are decisive. A specialist can assess which glass type and thickness is prescribed for your case.
What determines the cost of safety glass?
Costs depend on factors such as the glass type (ESG or VSG), pane size, glass thickness, any additional properties like sound or burglary protection, and the cutting and installation effort. It is best to obtain a written quote in CHF that itemises all positions.