glass types

Single glazing

Single pane glass is the most common form of glazing to be found in steel doors and partitions. The benefits of single glazing mainly boils down to the low cost. iSteel offers 4mm safety toughened glass as standard which is perfect for most domestic environments.


Below is a list of the single glazed types and their best/worst uses.


Standard single glazing options

iSteel Standard Offer 4mm Toughened Safety Glass

4mm clear glass is the most common glazing found everywhere in steel systems – all iSteel products are offered as standard with 4mm Safety Toughened Glass. It’s used because it’s cost effective, it’s not too bad for heat and sound insulation, and it’s light enough that the steel system hinges can carry its weight with ease allowing a light and easy travel of the steel doors. In terms of heat/sound insulation it offers value for money on a budget.

4mm toughened glass is one of the best glazing options for single glazed steel systems, it offers an acceptable level of security and safety within your home. The cost is low and the glass is strong enough to withstand a face on impact typical to the domestic environment. It doesn’t offer the thermal or acoustic insulating properties of 6.4mm laminate safety glass however, if the glass was to break it would shatter into small manageable pieces which will reduce the risk dramatically of cuts to anyone near by – Here’s a look at how it breaks safely.



Upgrade options

6mm Toughened Safety Glass

6mm clear safety toughened glass is an economical upgrade from 4mm in terms of security and noise reduction, however, if you are looking for a superior option on sound protection we would urge you to contact us directly to discuss your requirements as the best performing glass in regards to acoustics are laminated products, 6.4mm and 8.8mm been the most frequently used.


6.4mm laminate safety glass

If you’ve been reading this entire page, then you will understand that 6.4mm laminate safety glass is the all rounder when it comes to safety and security, with the only drawbacks being the additional weight and cost. The weight increase is only a minor issue, and it certainly is the pick of glass options when considering the important three; heat, safety, and security. A picture of 6.4mm laminate safety glass is best shown broken. Notice, if you had small children, they would be much safer because larger chunks of glass don’t fly everywhere when broken, the pane will crack, but stay together as one for the most part with the potential of only tiny fragments breaking away.



Sound proofing laminate glazing options

Acoustic Laminate Glass

Acoustic glazing is built up of annealed glass and a PVB interlayer. About ten years ago it was the range to have a thick piece of glass to reduce noise pollution and improve sound proofing. It since has been recognised, without really being said by the manufacturers of this glass, that acoustic laminate works incredibly well as an acoustic barrier when pitted against its toughened relative. Here’s a look at acoustic laminate safety glass.




We have installed 10mm & 12mm Toughened glass into properties before now and clients have been underwhelmed by the results which is disappointing considering the huge costs involved with this glass. 10mm thick glass is much heavier than 6.4mm laminated and it adds a great deal of weight to any steel door or partition. The weight of the glass is also a strain on the frame itself. Much better performance and results can be achieved from opting for a medium thickness laminated vs a thicker toughened glass. We are not saying toughened glass is no good, it serves its purpose as the starting point glass for our systems, but if acoustic protection is required then laminated glass is the way to go.