Commercial Glazing in units Safety Grade A Glass Double Glazed Silicone join glazing Fixed Glass Panels
FAQs | Frequently Asked Questions
What is glass?

Glass is amorphous (material which is non-crystalline is solid and lacks the characteristics of crystal) solid material.  It is typically brittle and transparent (clear to see through).

Glass is made by melting a mixture of sand (silica or silicon dioxide), soda (sodium carbonate) and lime (calcium carbonate) in a furnace at very high temperatures.

In a building glass is the only material that not only insulates from outside temperature extremes but can provide natural light and with the right glazing options offer energy efficiency.


What is glass made of?

Glass is made of three main components sand, soda ash and limestone.

What is float glass?

Float glass (also referred to as annealed glass or ordinary glass) is a single pane of glass commonly known as window glass.


What is toughened glass?

Toughened glass is made from annealed glass via a thermal tempering process (heat treated and quickly air-quenched to create compression i the outer surface and tension in the interior) to increase its strength. Toughened glass will shatter into small fragments instead of sharp shards when broken, making it less likely to cause severe injury or deep lacerations. Toughened glass is classified as Grade A Safety Glass.

Why is energy performance important in glass in windows?

Energy performance is important in the home due to where you are living in Australia determines what heat loss or heat gain you have in your home.

What does U-factor mean?

U-factor is a term used to quantify heat transfer and is commonly associated with heat loss - energy that transfers through the window when the outside temperature is cold. The lower the U-factor the better the energy in the home/building as this minimises heat loss from the building.

What does SHGC mean?

Solar Heat Gain Co-efficient refers to when the sun hits a window it will transmit through the glass, reflect the exterior or be absorbed into the glass layers....more

What does glazing mean?

Glazing, known as glass is a part of a wall, made of glass. Glazing also describes the work done by a professional glazier.

Common types of glazing include clear and tinted float glass, tempered glass, laminated glass and a variety of single, double or triple glazed units.

Glazing can be mounted in a window sash or door stile made of wood, aluminium or PVC. The glass is fixed into a rebate in the frame in a number of ways including glazing points, eg putty or glazing bead.

How do you select glass type for wind loading?

There are three (3) ways to select glass type for wind loading:

  • Aspect ratio charts
    Minimum span X wind pressure X glass thickness X glass
  • Use formula with constants for each glass thickness/type.
  • Supplementary tables supplied in Australian standards

“This is the preferred method to check glass thickness required” for wind loading


What is staining or etching on glass?

Glass staining/etching can be caused by different elements:

  • Condensation on stored glass, when water enters between panes of glass. The water remains trapped and evaporates very slowly causing an alkaline solution, which causes staining or etching.
  • Chemicals acids such as hydrofluoric and phosphoric
  • Pitting on glass due to welding splatter or sandblasting on a building site
  • Alkalis leaching (acid or a base used to dissolve a material into an water type solution) from concrete, mortar, plaster or gravel
  • Label or protective film deterioration after being left on the glass for a long period and exposed to the sun
  • Hard (acid) water that continually run onto the glass
  • Use of abrasive cleaning products such as powder based
  • Improper removal of splatter plaster, paint, mortar or varnish from glass
  • Scratching through metals, eg wearing of jewelery whilst cleaning, using blades to scrap off paint etc




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