FAQ’s

Ballistic Glass

Define Ballistic Glazing?


This glass is designed to resist the impact of bullets. It is extremely strong and visually transparent material and it is comprised of slim layers of a type of resilient plastic, known as polyvinyl butyral (PVB). Layers of PVB are inserted between sheets of glass and then the entire unit is sealed together by heat. As the layers build up, the product becomes stronger and the more layers that are included in the fabrication process, the more bullet-proof the glass becomes.

How does it work?


Hopefully you have not seen bullets fired at Ballistic glass in real life but you may well have seen movies or images showing the impact. Typically the strong PVB inter-layers absorb the energy of the bullet and prevent it from passing all the way through the glass. Ballistic glass goes through a thorough testing process so that it can be graded according to the calibre of weapon used – a hand gun will have significantly less power than a machine gun for example and the level of protection needed dictates the required specification of the bullet-proof glass.

What’s the best way to choose an appropriate product?


It goes without saying that it’s critical to specify the right level of strength given the environment and the risk involved. We can talk you through the key considerations which will help you specify the product and these includes elements such as – if splinters can be tolerated (spall or non-spall), the fittings that the glazing system will be installed into, the positioning of the glass etc. It’s essential to talk with experts as a wrong solution could render the protection ineffective.

Who can give me direction on the specification?


The people in the know are those that manufacture high-quality approved and verified Ballistic glass and Diamond Glass is hugely experienced in this area. We are not merely suppliers, we manufacture Ballistic glass to the most stringent of European standards and our products are independently certified by highly respected testers in the UK. If you are in the market to buy this product then we can give you expert advice and a top quality product, with indepth technical expertise to help define your requirement.

Fire Glass

What is fire Glass?


In the industry, this is often referred to as Fire-rated glass as it has to be manufactured to approved standards and can then be rated appropriately. The purpose of this glazing is to act as a protection against the spread of fire and smoke. The ratings are allocated according to the amount of time the glass can contain and withstand against the fire and the ratings range from half an hour to three hours. The final part of the test includes the heated glass being blasted by a two-person fire-hose, to assess its ability to resist water pressure and thermal water shock.

If we need fire-rated glass, do we automatically need impact safety glass?


There’s no automatic requirement for the two to always be matched – there are legal requirements that dictate when impact safety glass should be installed. For example, glass below 800mm from the floor or in a 300mm proximity of a door (& door glass itself), does require impact safety glazing.

What are the potions with fire-rated glass?


There are two elements that influence the Fire Glass that should be specified and these include the required protection & where the glass is to be located on-site. Diamond Glass has the expertise to help you specify the right product and we manufacture a comprehensive range of fire rated glass products – single glazed & integrated into IGUs. More

Can fire-rated glass be used in external spaces?


Yes, we can produce fire glass for both external and internal environments. Again the specification of the glass will be impacted by the application so call us to learn more

Security Laminates

How do EVA and PVB differ?


Both products are known as “Interlayer Films”and both are used in the fabrication of safety laminated glazing. PVB is the more common film and it is easier to work in certain respects; equally EVA is an innovative alternative with specific advantages over PVB…

Polyvinyl Butyral (PVB) is primarily used in applications such as windscreens for motor vehicles and laminated safety glass for architectural building windows. It is generally not applied for exteriors as it not highly weather-resistant.

EVA is often used for Architectural glass and in applications such as Overhead, Vertical and Sloped safety glass. Its primary advantage is its robustness and the fact that it is moisture-resistent and therefore effective in exterior applications.

More advantages of EVA film include

  • Superior Light Transmission (≧92%)
  • Practically Complete UV Protection (≧99%)
  • High Tensile Strength (≧21 Mpa)
  • Strong Adhesion (≧50N /cm )
  • Qualified Impact Resistance (As has PVB)
  • Moisture Resistance As PVB Does

There is a commercial consideration however as EVA is typically more expensive than PVB materials therefore if that level of protection is not required, it can make more commercial sense to specify PVB. Equally EVA offers significant advantages – talk to Diamond Glass and we can help define your best potion.

Contact Diamond Glass now for definitive advice on fire glass