Frequently Asked Questions

Did you know…?

What are glass blocks? And where can we use them

Glass Blocks are and architectural element made from glass that provides natural light.  Glass blocks can be used in a variety of applications, from vertical walls to floors and roofs.

Where are the Vitrablok glass blocks manufactured?

Our glass blocks are manufactured in the Czech Republic by the world leaders in glass block manufacturing – Seves spa.  Seves manufacture quality blocks that have been rigorously tested to European standards and are guaranteed to last.  They offer a range of glass blocks in different sizes and colours and are continuously working on expanding their range of products.

Do I need a frame?

GBC always recommend a frame as the frame allows for the contraction and expansion of glass blocks against the different building materials, guaranteeing that the glass blocks will not crack.  It also allows for quicker and easier installation, security and aesthetically will match other windows in your home.  Our frames can be Powder-coated to match design requirements.  The Ezylay Silicone System cannot be installed without a frame.

Can I install the glass blocks myself?

If you are a competent handy person then you can absolutely install the glass blocks yourself.  GBC can supply you with a complete DIY kit in either the Ezylay Silicone or Mortar Systems.  The Installation guides can be found on this link Ezylay Silicone System Installation guide or Ezylay Mortar System Installation Guide.   Just give us a call or email and we can guide you through the process.

Do you have a showroom?

Yes – all our blocks are displayed at 777 Marshall Road, Malaga Western Australia 6090.  You are free to come in and view the different patterns – you will be surprised by the range.

Glass Blocks by themselves are not fire rated?

Glass Blocks are only fire rated compliant if they are installed correctly using the system and in accordance to the tests that were performed in Europe and to CSIRO opinions.  It is therefore imperative that the installers have been trained specifically for fire rated glass block applications as the glass blocks, framing, reinforcing, joint sizing and fixing details different to normal installations.


Glass Block Constructions can supply tests and opinions to satisfy your council requirements?

We only use products and materials that were involved in extensive tests and approved by the CSIRO to Australian Standard 1530.4-1997.

Fire Rating Level is categorised by Structural Adequacy/Integrity/Insulation?

It should be noted that the definition of integrity includes structural collapse automatically achieves structural adequacy for the same period.  Therefore FRL -/60/- and -/90/- is equivalent to FRL 60/60/- and 90/90/-

Insulation related to “radiated heat”?

Radiated heat is similar to light, it does not warm the air through which it passes but directly heats objects such as people.  We can supply glass block panels that prevent radiated heat passing through the glass block for 90 minutes.

Glass Block Constructions can supply two classifications of Fire Resistance?

Fire Resistant glass structures are usually made of one or more transparent space enclosing elements as well as seals and fastening elements.  In their function as space-enclosing elements, they should prevent the spread of fire and smoke for a certain period.  Glass blocks used in fire resistant glass structures are not load-bearing.  They offer great versatility where fire-protection needs are higher and yet natural light and/or transparency are desirable.

Fire Resistance Class G/E (Integrity only)

Class G glass structures are a transparent vertical (>800 – 900)and horizontal (00 – 150) enclosures, which prevent the spread of fire and smoke.  The structures prevent the emission of heat radiation and the applicable standards specify no requirements on the heating of surfaces facing away from the fire.  The glass surface with the enclosure must not collapse within the classification period (G30 – G120). and must remain intact as space enclosing elements.

Fire Resistance Class F/EI (Intergrity and Insulation)

Class F glass structures are transparent vertical (>800 – 900) and horizontal (00 – >150)enclosures, which prevent the spread of fire and smoke as well as heat radiation.  The temperature of the surfaces facing away from the fire temperature difference may not increase by more then 1400 /Kelvin on an average and 1800 K at any single point (DIN 4102, part 2, Section 5.2.2).  NB  F-90 fire resistant wall tested for low impact (3000 Nm) as per DIN 4102-2, 28mm joint.