Nickel Sulphide Inclusions

Nickel sulphide is a mineral that can be found in some raw materials used to make glass. Nickel sulphide inclusion in glass and windows refers to when there are tiny particles of metal that end up in the glass during manufacturing. Nickel sulphide inclusions can sometimes result in thermal expansion or spontaneous breakage:

Thermal Expansion: Glass and nickel sulphide inclusions expand and contract differently when heated or cooled. This difference can create stress within the glass.

Spontaneous Breakage: One of the risks associated with nickel sulphide inclusions is spontaneous breakage. If there are inclusions present in the central portion of the toughened glass, spontaneous breakage can occur. You will know if it’s caused by inclusions because you will see a ‘butterfly effect’ on the glass. It will likely centre around one part of the glass and will spread in a butterfly wing effect.

Unfortunately it isn’t possible to remove the risk of nickel sulphide inclusion due to the way all glass is made. As a result, spontaneous breakage from nickel sulphide inclusion isn’t something that is covered by any glass warranty or guarantee. If you experience breakage from nickel sulphide inclusion you may be covered by your home insurance policy and would recommend checking with your insurance provider.