Jason Windows
Builders Section


Glazing 2

Assisting your clients with their glass selection can have a big impact on their comfort and energy costs once they move into the home. Here are a few considerations:

  • The orientation of the home
  • The desired comfort level for each room
  • Amount of light required
  • Security risk management
  • Noise level requirements
Annealed Glass

Annealed glass, also commonly known as float glass, is the basic flat glass product that is the first result of the glass manufacturing process. Annealed glass is cooled slowly under controlled conditions during production. This annealing procedure removes internal stresses from the glass.


Annealed glass is the minimum standard for glass in the home. It’s also the base starting material for other glass types - such as Low-E, Laminated and Toughened glass.

  • Surface strength provides the wind-load performance and thermal-stress resistance needed in most architectural applications
  • Excellent visibility
  • Available in different tones and opaque options
  • Excellent light transmission in clear tone
  • Cost effective for clients on a budget
  • Tends to break into irregular, sharp pieces when broken
  • The strength limitations of annealed glass limit the size of usable pieces. Size limitations are specified by Australian Standard AS1288 - Glass in Buildings - Selection and Installation
Toughened Glass

Toughened glass is often referred to as safety glass or tempered glass. Toughened glass is annealed glass, heated and then rapidly cooled and is also classified as Grade A Safety glass. Toughened glass is five times stronger than standard annealed glass of the same thickness and the toughening process reduces the risk of cracking.


Toughened glass is recommended in areas where windows require structural strength and safety such as elevated windows and large feature windows. Like laminated glass, toughened glass is also suited to areas of the home most prone to injury from human impact such as bathrooms, splashbacks, doors and full length windows.

  • Suitable for when strength, thermal resistance, and safety are all important considerations
  • Safer – if broken, the glass shatters rather than breaking into dangerous shards
  • Physically and thermally stronger than regular glass
  • Suitable for use in large openings
  • Available in different tones and opaque options
  • Sometimes exhibits minor distortion caused by the toughening process
Laminated Glass

Laminated glass, also referred to as safety glass, is classified as Grade A Safety glass and consists of two or more sheets of glass permanently bonded together with an interlayer designed to improve acoustics and/or impact resistance. The interlayer reduces the risk of the glass breaking and forming long, dangerous shards.


Laminated glass is perfect for areas of the home most prone to injury from human impact such as bathrooms, doors and full-length windows and offers a cost-effective alternative to toughened glass. If your client requires special performance, laminated glass is suitable for sound reduction, energy efficiency and additional security.

  • Increased sound insulation
  • Safer – if broken, glass fragments remain in place rather than breaking into dangerous shards
  • Improved security
  • Durable
  • Standard laminated glass provides better protection against UV rays which can fade furnishings
  • Low E Laminated glass further decreases UV transmission offering some protection of fading furnishings
  • Available in a range of tones and opaque options
  • Difficult to break in an emergency
Toned Glass

Toned glass, often commonly referred to as tinted glass, is made by including colouring additives to normal clear glass during the manufacturing process. The majority of tinting is done with shades of bronze, grey, blue or green. These tones of glass significantly reduce glare and heat gain from the sun. Supertoned glass, also known as supertinted, uses a heavier pigmentation to provide even greater solar heat control.


With the sunlight absorbing properties in tinted glass, it is ideally suited to warmer climates when ideal window orientation is not achievable. The coloured tint within the glass absorbs a greater proportion of solar heat in comparison to clear glass. Toned glass is particularly useful for reducing the sun’s impact on unshaded windows.

  • Reduction in heat and glare
  • Minimises furniture fading
  • Reduces cooling costs
  • Minimal exterior reflection
  • Increases privacy during the daylight
  • Reduced outlook visibility
  • Visible light will decrease in thicker glass
  • Toned glass will not look the same at night. Lit rooms will be visible from the outside
Low-E Glass

Also known as Low Emissivity Glass - Low E glass has a thin, transparent metallic coating that reduces the transfer of heat or cold through the glass. As such, in the winter the home stays warmer and in summer it stays cooler. It’s helpful to think of Low E glass like insulation panels for windows & doors.


Where greater solar and thermal control is required in the absence of natural heating, Low-E glass can be used. It is also an option to consider to help achieve the Energy Efficiency Rating for new homes, especially if your client desires plenty of light.

  • Greatly improves insulation performance
  • Available in a range of tones
  • Reduces energy costs
  • Can be incorporated with Laminated glass or Double Glazing
  • Desired comfort level can be achieved in both winter and summer without losing the feeling of open space
  • Has a slight hazy look from some angles
Double Glazing

Traditional window glazing consists of a single sheet of glass within the window sash. Double glazing consists of two panels of glass which are separated by a layer of air or argon gas and then sealed. The air creates the insulation break which greatly reduces both heat flow and thermal conductivity through the window. Double glazing panels are also known as Insulated Glazing Units (IGUs).


Double glazing thermal benefits makes it ideal for windows in rooms where there is the desire for more control of heat gain and loss through the glass.

  • Excellent insulation performance, reducing energy costs
  • Can minimise noise if the right glass combination is used
  • Reduces condensation
  • Different glass types such as Low-E and Laminated glass can be used to further improve energy efficiency and noise control
  • Can be expensive depending on the application
  • Generally has a longer payback period for energy costs

Glass Appearance

Best suited for clarity and low distortion. Use in areas you want to flood with natural light or enjoy a clear view. For north facing elevations, use to heat up north facing rooms in the winter.

Light reduction: 10%
Solar Transmission: 10%
UV Transmission: 35%

Neutral glass is lightly toned and only available in Low E. The light tone is often preferred for a softer natural light effect.

Light Reduction: 35%
Solar Transmission: 55%
UV Transmission: 60%

Commonly selected to achieve a darker elevation and to reduce the amount of light coming into the home. Offers good reduction levels of UV light. Pairing a low light glass with the insulation properties of Low E glass, will provide greater energy efficiency than Low E alone.

Light Reduction: 50%
Solar Transmission: 50%
UV Transmission: 75%

Offering a small reduction in light and UV light, the Green toned glass can provide a softer natural light effect. Pairing a low light glass with the insulation properties of Low E glass, will provide greater energy efficiency than Low E alone.

Light Reduction: 20%
Solar Transmission: 50%
UV Transmission: 65%

The Cathedral pattern is aesthetically pleasing while offering privacy.

The subtle pattern of our Satinlite obscure glass makes it a popular choice with WA home owners.

The Spotswood light textured pattern provides excellent obscurity.

With a smooth milky finish, our translucent glass provides a high level of privacy and is often chosen for front entry doors, and can be paired with a toned glass.

Note: These values are a guide only. Light, solar and UV levels are impacted by the thickness of the glass and the type of glass you choose. Speak with a Jason Windows glass expert for further assistance when choosing glass for your home.