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How Much Does Double Glazing Cost?

Last Updated: Mar 20, 2015 by

Topic: Double Glazed Windows, Renovation Costs

Getting double glazed windows can be one of the best ways to reduce heating and cooling costs and do your part in conserving energy, but is it worth the extra cost? Here's what you need to know.


©Rylock

What is Double Glazing?


A double glazed window has two panes of glass separated by an air or gas (usually argon) pocket between the panes. This pocket is what makes a double glazed window an effective insulator.

Technically, double glazed windows are called Insulated Glass Units (IGUs) because the panes of glass must be properly sealed into a single unit to provide adequate insulation. The gap between the panes can be anywhere between 6mm and 20mm, with a greater gap providing greater insulation. IGUs with argon gas filling the gap are said to provide even better insulation.


How Much Does Double Glazing Cost?*


The price of a double glazed window will depend on its quality, but you can expect to pay at least 25% more than for single glazed windows. If you're building a new home and want double-glazed windows throughout the house, you can expect to pay up to $800 per square metre for top quality timber-framed double glazed windows. Aluminium double-glazed windows will cost less per square metre, but still cost significantly more than single-pane aluminium windows.

You can expect to save about 25% on your energy consumption and bills if you install double glazed windows. Depending on your personal energy consumption, it may take 5 years or more to recoup the extra cost of double glazed windows. However, your one-time investment in windows will make your life more comfortable and helps fight rising energy costs over the years.

If you're renovating, it makes sense to pay extra for double glazed windows in areas where you and your family spend a lot of time. Aside from helping reduce your energy consumption, double glazing helps prevent hot and cold spots near windows and glass doors, giving you greater comfort throughout the room.

Also consider replacing single glazed windows with double glazed in areas where you want natural light to enter the room. The double glazing will allow natural sunlight in but help prevent the room from overheating. For even greater comfort and thermal efficiency, consider double glazing with one low-e glass panel.

If you're in the market for windows, get quotes for double glazed windows from window suppliers. They can help you choose the right windows for your needs and stick within your budget without sacrificing energy efficiency or comfort.

*Cost and prices in this article are indicative and should only be used as a guide. They also vary locally and are subject to market forces.

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