Ask Pilkington


Ask Pilkington

Can impact damage cause toughened glass to break?

Impact damage is one of the commonest form of ‘spontaneous’ breakage of toughened glass, often from deliberate impact, such as throwing stones, pellet guns etc. It can be very difficult to identify because the ‘star’ pattern seen in annealed glass is overwhelmed by the innate fracture pattern of the toughened glass which often falls from the frame. The impacting object, a pebble or air gun pellet may not end up in the vicinity of the broken glass which can then lead to the misconception of ‘spontaneous fracture’ being deemed as the cause of breakage.

Was this helpful?
Thank you for your feedback.
We're sorry to hear that, please refine your search and try again.

We value your privacy.

We use cookies on this website for analytics, remarketing, social media (optional) and content (essential) purposes.

By clicking ‘Accept All’ you consent to the use of cookies for non-essential functions and the related processing of personal data. Alternatively you can reject non-essential cookies by clicking ‘Essential Only’. You can adjust your preferences at any time by visiting our Cookie Policy and access the settings on that page.

For more information please read our