The Complete Guide on the Cost of Double Glazed Windows—Average Double Glazing Windows Cost

Did you know?

Double glazing reduces the heat loss from windows by over 50%, saving you tons of money and energy every month. Besides energy conservation, the long-term benefits of double glazed windows are worth every penny.

The double glazed windows are made with double glass panes with a few millimeters of space between them. In between the glass panes, there are air pockets that act as excellent insulation and regulate the temperature. This way your room remains warm in winter and cold in summer.

Above all, the best thing about double glazing is its suitability for every window type—sash, tilt and turn, or casement window.

In this article, we’ll find out the average cost of double glazed windows.

What is the Average Cost of Double Glazed Windows?

The cost of double glazed windows depends on several factors, including window type and size, glass thickness, frame material, etc.

However, here is a rough breakdown of the average cost of double glazed windows:

Average Double Glazing Windows Cost per square meter

The average cost per square meter for double glazing can range from anywhere between $500 to $2,500

Double Glazing Price per Window

The cost per window for double glazing depends on a variety of factors. However, on average it may cost around $1,700 to $4,500 or over for window installation. This can vary a lot from size of the window, type & how many openings. If you are in Melbourne, give us a call today for an exact quote

We always advise getting quotes from different suppliers for an accurate estimate as per your requirements.

Double Glazing Windows Cost of Installation

The average cost of installation for standard double glazing can range from $300 to $900, depending on the type, size, and the number of windows.

How long do double glazed windows last?

If properly maintained and taken good care of, double glazing windows will last for around 20 years or more.

But, there are instances of some units facing problems in less than 10 years. This is due to poor installation and not maintaining your windows regularly. We recommend hiring a company that guarantees at least a ten-year warranty for your double glazed windows to avoid inconvenience.

Key Factors That Determine the Double Glazed Windows Cost

The cost of double glazing windows largely depends on four important factors:

Window size and type

Large windows require more glass, gas, and drying agents. Therefore, the larger the window, the costlier it will be.

Furthermore, the type of window also affects the pricing. If you double glaze a sliding window, it will be costlier to install than a casement window.

Number of windows needed

The number of windows to double glaze highly affects the final cost. Many suppliers offer bulk discounts and charge reasonable prices for bulk orders. Therefore, you should always consult with at least 4 suppliers before placing an order.

Additionally, the style of windows and size might alter the final price. Large windows with certain styles may cost higher than smaller windows with a standard style.

Frame material

As mentioned earlier, there are three different double glazing windows and the cost differs accordingly. UPVC window frames are popular and the most cost-effective choice for many homeowners.

Aluminum is ideal for commercial buildings and modern homes, but pricey than UPVC frames. Whereas, wooden or timber frame is the most expensive luxury frame material you’ll find with a more natural, traditional, and aesthetic appeal.

Glass thickness

The thickness of glass directly affects the insulation properties of your window glazing. Thicker glass also provides better insulation and reduces energy costs, ultimately leading to an environmentally friendly, sustainable experience.

However, thicker glass adds to the cost of labour, the number of panes, and the amount of gas filled between the spaces. Hence, more expensive than the standard glass quality.

Advantages of Window Double Glazing

The demand for double glazing windows is increasing day by day because of their unparalleled experience and advantages as compared to conventional windows.

Some pros of double glazed windows are:

Noise Reduction

Noise coming out of your house, especially if you’re living near an airport or a busy street can be a nuisance. Double glazed windows are an excellent option to stop noise and soundproof your home, ultimately reducing noise pollution and heat loss for a more peaceful and enjoyable living experience.

Energy Efficient

Save more money on energy bills with double glazed windows. That’s because your home stays warm during the winters and cool during the summers, so there are low energy costs all year long. 

UV Resistant

During those hot summer days, the double glazing windows block UV rays that damage your furniture, carpets, and other furnishings by reducing the penetration of sunlight.

Increased Resale Value

You can significantly increase the resale value of your home by investing in double glazing windows. The changes you have made to your home might allow you to sell it for more money in the future if you decide to do so.

Reduced Condensation

You can better utilize your house by installing double glazing and reducing condensation.

For example, if your doors and windows condensate during a chilly season, they will get damaged and catch mould. By installing double glazed windows, the chances of mould and other damages become slim.

Increased Home Security

The impact-resistant inner beading and innovative security mechanism or double glazing windows provide more safety than conventional windows.

You can leave your home without worrying about robbery and theft is the ultimate attraction for most homeowners. The modern double glazed windows are more secure as they are protected with security deadlocks for increased home safety.

Rot, Warp, and Corrosion Resistant

These windows require little to no maintenance and are long-lasting.

Disadvantages of Double Glazing Windows

There are three main cons of double glazing windows.


When the gap between the two panes of glass is not sealed properly, moisture and condensation build up over time. As a result, the glass panes are sealed together, which becomes impossible to separate or repair.

Heat Trapping

Double glazing windows are a blessing in winter especially when they trap the heat inside your home.

However, during summer, the trapped head can be a nuisance. Therefore, many homeowners invest in window tinting which results in additional costs.

Style Fit

These windows are a treat to watch in modern homes

However, in older homes, they don’t usually fit in nicely.. For homeowners with old homes, retrofitting their existing window frames is an ideal option that would cost them additional money.

Maintenance and Care of Double Paned Windows

No matter how professionally you install the double glazed windows in your home, weather conditions, wear and tear, and traffic fumes can ruin their overall look.

Therefore, to keep them in pristine condition, there are three quick and easy steps to maintain them.


Over time, dirt and grease may build up on your double glazing, which can be a reason for discolouration that looks absolutely horrible.

To cater to this, it’s crucial to vacuum the frame, screens, openings, and seals regularly. If you vacuum your windows regularly, it will save a lot of time and hassle of using soap and water or other cleaning agents.

Avoid Moisture

Dampness or condensation is the main culprit of black-spotted mould that destroys your double glazing.

Condensation can form on any window whether traditional or newly installed. It’s even worse on wooden frames as the damp patches can lead to wood rot. Therefore, always keep your rooms well-ventilated to avoid moisture from trapping into your windows.

Use Vinegar and Water

The vinegar and water technique is a traditional method to clean your windows and leave them gleaming. Just use an old sock and damp it in a mixture of vinegar and water to sparkle your windows. It’s a super cheap and long-lasting cleaning method.

Causes of Double Paned Failures

If your double glazed windows are not working as they should, these are the causes:

High Pressure Sprays

High-pressure sprays are therapeutic to use on patios and driveways, but they can be destructive for your double glazed windows. The intense pressure may weaken the sealant and crack the glazed glass. Therefore, always avoid high-pressure sprays.

Quick Fixes

Double glazed windows are made of glass panels, hence, fragile. However, no matter how small or trivial an accident may seem. Never do quick fixes on your window panes because you’ll end up spending more money.


Never hand decorations, plant pots, unsuitable paints, and nailing curtain ties to your windows. Tempering with them may compromise their functionality, efficiency, and safety.

If you want to make your windows look aesthetically pleasing, check with the experts so you get the best advice.


If you’re looking for a cost-effective solution to insulate your home and save energy, double glazing is an excellent option. It not only helps in saving energy but also stops noise pollution and increases safety.

There is a multitude of window suppliers to confirm the double glazing costs of windows. However, the overall average cost depends on many factors, including window size, materials, and glass thickness. With proper installation and regular maintenance, you will see long-term benefits and an increase in the value of your property.

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