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Heat-strengthened glass

Tough heat-treated glass that's ideal for secure laminated glazing

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TG HSG

Choose ToughGlaze for high-quality, Kitemark-approved heat-strengthened glass.

Quality: TG HSG is compliant with the EN 12150:2000 standard.


Convenience: made-to-measure – everything under one roof.


Peace of mind: we provide a fast, flawless service informed by the latest in glass processing technology.

Heat-strengthened glass that meets your requirements.

Ensure safety in overhead glazing with our sturdy HS glass.


If you're looking into getting some overhead glazing, you need the right glass for the job.


When laminated with toughened glass, heat-strengthened glass breaks into large pieces but stays in the frame. This means it's less likely to fall in the event of a breakage.


And on its own, it can be used for general glazing where officially designated "safety glass" isn't required.


What's more, the industrial process we use reduces surface distortion, resulting in a clearer visual quality.


Trust ToughGlaze to deliver heat-treated glass, cut and processed to your requirements.

When you need glass tempered and made to measure, call in Tough Glaze

Take the reins on glass heat-treating

Know what you're looking for? Then let us know your requirements and we'll get on it. Work with us and expect complete control over the size and thickness of your order.

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Maximum size: 2800 x 6,000 mm

Thickness range: 6 mm to 10 mm

Industry applications

Heat-strengthened glass is often used for rooflights and other types of overhead glazing – but it can also be used for shatterproof windows and doors. Here are just some of the industries we serve.

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HS glass for windows

We're a trusted supplier of heat-treated glass for glaziers across the UK.

HS glass for partitions

Partition installers use heat-strengthened glass for safety and sturdiness.

Glass for balustrades

ToughGlaze supplies high-quality heat-strengthened glass to balustrade installers.

HS glass roof panels

Heat-treated glass is ideal for overhead glazing including rooflights when laminated with toughened glass.

Sales and support

We've been supplying industries with heat-strengthened glass for 30+ years. Let us know your requirements today and we can promise a professional service from start to finish.


  • Trusted for glass processing since 1993
  • Distribution throughout the UK mainland (depending on order)
  • ISO 9001:2015 accredited for quality management
Speak to the experts

Frequently asked questions

  • What is heat-strengthened glass?

    Heat-strengthened glass is a robust type of glass that's designed to break into large pieces in the event of breakage. On its own, it's not considered a form of safety glass.


    When laminated with toughened glass, it's ideal for overhead glazing where falling glass could be an issue.

  • How does heat-strengthened glass break?

    Heat-strengthened glass is designed to break into large pieces. This is unlike toughened glass, which shatters into many small fragments.


    When laminated with toughened glass, heat-treated glass helps the panel stay in the frame, increasing the safety of overhead glass installations.

  • What are the uses of heat-strengthened glass?

    Heat-strengthened glass can be used in overhead glazing, windows, doors and many other glass products.

  • What is the difference between heat-strengthened and toughened glass?

    Toughened glass and heat-strengthened glass are made using the same process. HS glass is less strong but designed to break into large pieces. This is sometimes desirable – for instance, when laminated with toughened glass for overhead glazing.

  • Is heat-strengthened glass safety glass?

    According to construction safety standards, heat-strengthened glass is not a form of safety glazing. However, the heat-treating process gives it a breakage pattern that stops the glass from falling and injuring anyone when laminated with toughened glass.

  • Can heat-strengthened glass be cut?

    Once processed, heat-strengthened glass can't be cut – but it can be made to measure.

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