DIFFERENT TYPES OF WINDOW GLASS

Different Kinds of Window Glass

Choosing the right type of glass for a window glass replacement can be an overwhelming process due to the vast amount of choices available. Glass manufacturing has come a long way in the last 20 years and these days there is a different type of glass for every application you can think of from reducing sun glare, to helping heat and cool your home, and even glass which prevents injury when it is accidently shattered.
To help make the process easier for our customers, we’ve listed the most common types of glass installed in homes throughout Australia –

Float Glass

Float glass or glass that has been annealed is a basic flat glass product. It is what is obtained initially during the overall process of manufacturing glass. During this production process, annealed glass goes through a slow process of cooling under conditions that are controlled. This procedure of annealing removes all the internal stresses in the glass.

Benefits of Float Glass

Cost-effective
Light transmission is outstanding and has a clear tone
Various options and tones are available
Visibility is outstanding
It has a surface strength that offers performance against wind-load and the resistance to thermal stress that is required in architectural applications

Toughened Glass

Toughened glass is also known as safety glass or tempered glass. Australian Standards classify it as Grade A safety glass. Toughened glass is also one variety of annealed glass. Heating of this glass is done in a furnace, after which the glass is cooled rapidly. Because of this toughening process the risk of cracking is lowered. Compared to standard annealed glass, toughened glass of a similar thickness is five times stronger. The purpose of providing toughened glass is to reduce the chances of it causing injuries when it is broken by any human impact.

As per Australian Building Regulations and Standards, Safety Glass of Grade A has to be used in:

Low level glass areas that are larger than 1.2 square metres. Areas that are smaller than this must have a thickness of glass that is at least 5mm.
Areas that can be seen as an opening, like full height windows with fixed glass
Door Side panels when they are 1200mm or less from the floor, and 300mm from the door
Bathrooms where the height is upto 2m
All glass doors

Benefits of Toughened Glass

You can get it in many tones and opaque options
Ideal for use in large openings
Physically and thermally stronger than regular glass
Safer – When this glass breaks, it never breaks into shards, but into tiny pieces that are not as dangerous
Suitable when important considerations are strength, thermal resistance and safety

Laminated Glass

This is glass that is made of two layers of sheet glass that have a permanent bonding through an interlayer that improves acoustics and impact resistance, and is also called safety glass. When the glass meets the relevant standards, this laminated glass has a classification of Grade A safety glass.

Areas of a home that are prone to get damaged by human impact like in bathrooms, or full length doors and windows are better glazed with laminated glass. It is glass that is best used where you need additional security, UV protection, sound reduction, and energy efficiency.

Benefits of Laminated Glass

Outside sounds can be minimised with the use of laminated glass that has an acoustic rating
Safer- When the glass breaks, the fragments stay remain bonded to the interlayer in the panel, and will not break into shards that can be a danger
Standard laminated glass improves the protection to kitchen benchtops and furnishings that can fade due to exposure to UV rays
Low-E Laminated glass reduces by 30%, the heat conducted by it as compared to annealed glass. It also reduces glare and improves thermal efficiency
The range of options and tones it is available in include:

Translucent with a milky smooth finish
Green
Grey
Lightly toned or neutral

Low-E glass

Low-E Performance Glass has a coating that permits natural light to go through without it emitting any radiant heat, and this helps in maximising light and energy efficiency. It is a glass that sees use where there is need for greater solar and thermal control and in spaces that are not naturally heated. It is an option that needs to be considered for the Energy Efficiency Ratings of new homes, especially in those where you desire to have plenty of light.

Benefits of Low-E Glass

Improved insulation and greater solar control is provided when tints are used for all year long comfortable temperatures inside a home
Availability in a wide range of tones
The rate of furniture fading is reduced as this glass absorbs UV radiation

Double Glazed

Double glazing has two panes of glass that are sealed after they are separated by a layer of air or argon gas. An insulation barrier is created by the argon gas that is more effective in comparison to air and helps to reduce heat flow through glass and its thermal conductivity. Jason windows only makes use of argon gas in their products that are double glazed.

The thermal benefits that double glazing brings makes it perfect for windows of rooms where you want to have greater control over gains and loss of heat through windows.

Benefits of Double Glazing

Energy costs are reduced by their outstanding insulation performance. Energy efficiency of the double glazing is further increased, if use is made of Low-E performance glass.

The right glass combinations can minimise noise, and this can be of great benefit when you live on a traffic filed street or in the flight path. If noise reduction is the only thing required, then laminated glass makes for a solution that is cost-effective.

Humid air condenses on a glass surface that is cold, but this is reduced when double glazing is used.

Window coverings provided insulation, but this necessity is reduced through using double glazing. If privacy is not a concern curtains and blinds become unnecessary for maintaining comfortable room temperature.

About the Author
David Chahine

David Chahine

David has over 5 years experience providing glass repair and replacement and is also the owner of Primal Glass Replacement

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