When it comes to improving the comfort and energy efficiency of your home, double glazing is one of the most effective solutions. Double glazing not only enhances thermal insulation but also reduces noise pollution and increases security.
However, with so many options on the market, choosing the right double-glazing products for your home can feel overwhelming. In this guide, we’ll explore key factors to consider when selecting double glazing, helping you make an informed decision that suits both your needs and your budget.
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Why Invest In Double Glazing?
Before diving into the selection process, it’s important to understand why double glazing is worth the investment. Here are the key benefits:
- Energy Efficiency: Double glazing creates a barrier that reduces heat transfer, keeping your home warmer in winter and cooler in summer. This can lower energy bills, as your heating and cooling systems won’t need to work as hard.
- Noise Reduction: The air gap or gas between the two panes of glass acts as a sound barrier, reducing external noise. This is particularly beneficial if you live in a noisy area, such as near a busy street, train line, or airport.
- Security: Double-glazed windows are harder to break than single-glazed windows, providing an extra layer of security for your home.
- UV Protection: The additional layer of glass helps to block harmful UV rays, which can cause fading to furniture, carpets, and other interior furnishings.
- Improved Comfort: Double glazing can help maintain a more consistent indoor temperature, making your home more comfortable year-round.
Factors To Consider When Choosing Double Glazing Products
Now that we’ve established the benefits of double glazing let’s look at the factors that should guide your choice of products.
Type Of Glass
The type of glass used in double glazing can significantly affect performance, insulation, and overall durability. Some common types of glass include:
- Standard Float Glass: This is the most common glass type used in double glazing. While it’s affordable, it offers standard insulation and soundproofing properties.
- Low-E (Low Emissivity) Glass: Low-E glass has a special coating that reflects heat back into the room, improving thermal insulation. This type of glass is highly effective in reducing energy costs, particularly in colder climates.
- Laminated Glass: Laminated glass has a layer of plastic between two layers of glass. This makes the glass stronger and more secure. It also provides superior soundproofing, making it ideal for homes near noisy environments.
- Tempered Glass: Tempered glass is heat-treated, making it stronger and safer than standard glass. It is less likely to break into sharp shards if shattered.
Gas Fill
The space between the two layers of glass can be filled with different types of gases to enhance insulation properties. The most common gases used are:
- Argon Gas: Argon is a popular choice because it is an inert gas that doesn’t conduct heat well, improving insulation.
- Krypton Gas: Krypton gas is more expensive than argon but offers better insulation performance. It’s often used in high-performance glazing systems where maximum energy efficiency is desired.
- Air: Some double-glazing systems simply use air in the gap between the panes. While this is cheaper, it doesn’t provide the same level of insulation as gas-filled options.
Frame Material
The material of the frame surrounding the double glazing is another critical factor. The frame can affect the performance of the glazing in terms of insulation, durability, and aesthetics. The most common materials for double-glazed window frames include:
- uPVC (Unplasticized Polyvinyl Chloride): uPVC is a popular choice in Australia due to its durability, low maintenance, and excellent insulation properties. It doesn’t conduct heat, helping to improve the overall energy efficiency of your windows.
- Aluminium: Aluminium frames are known for their strength and sleek appearance. However, they tend to conduct heat, which can affect the thermal performance of your windows. To counter this, modern aluminium frames are often thermally broken, meaning they include an insulating barrier between the inner and outer parts of the frame.
- Timber: Timber frames offer a natural look and provide good insulation. However, timber frames require more maintenance than uPVC and aluminium, such as periodic painting or sealing to prevent rot and weathering.
- Composite Frames: Composite frames combine materials like timber and aluminium, offering the aesthetic appeal of wood and the low maintenance of aluminium.
Window Style And Design
The style of window you choose can impact both the look and performance of your double glazing. Common window styles include:
- Casement Windows: Casement windows are hinged on the side and open outward. They provide excellent ventilation and are easy to operate, making them ideal for homes where airflow is a priority.
- Sliding Windows: Sliding windows are a great choice for spaces where opening and closing windows are difficult, such as in high-rise buildings. They are typically more space-efficient and low-maintenance.
- Awning Windows: Awning windows are hinged at the top and open outward. They’re ideal for areas where you want to let air in but keep out rain, such as bathrooms or kitchens.
- Fixed Windows: Fixed windows don’t open, but they provide excellent views and are usually used in conjunction with other window styles. They are perfect for large, unobstructed views.
- Tilt and Turn Windows: These windows can tilt inwards for ventilation or fully turn inwards for cleaning. They are often used in modern, European-inspired designs.
Performance Ratings
In Australia, windows are rated according to their performance in various areas, including energy efficiency, soundproofing, and safety. Look for windows that have been tested and rated by accredited bodies, such as the Window Energy Rating Scheme (WERS) and the Australian Window Association (AWA).
Key ratings to look out for include:
- U-Value: This measures the rate of heat transfer through the window. A lower U-value indicates better insulation.
- SHGC (Solar Heat Gain Coefficient): This measures how well the window blocks heat from the sun. A lower SHGC is better for keeping your home cooler in the summer.
- Sound Transmission Class (STC): This rating measures the effectiveness of the window in blocking sound. Higher STC ratings mean better soundproofing performance.
- Air Leakage Rating: This rating measures how much air leaks through the window. Lower air leakage means better insulation and energy efficiency.
Cost
Double glazing products can vary widely in price, depending on the materials, glass types, and additional features. While it’s tempting to choose the cheapest option, it’s important to consider the long-term benefits of investing in higher-quality glazing. Opting for energy-efficient glass and durable frame materials may cost more upfront but can save you money on heating and cooling bills over the years.
Professional Installation
Proper installation is essential for achieving the full benefits of double glazing. Even the best products will underperform if they aren’t installed correctly. Make sure to hire a qualified and experienced installer who can ensure that your windows are fitted properly, sealed correctly, and aligned with your home’s insulation needs.
Look for installers who are members of professional associations, such as the Master Builders Association or the Australian Glass and Glazing Association (AGGA), to ensure they meet industry standards.
Warranty And Maintenance
Double-glazed windows typically come with a warranty, which can range from 5 to 20 years, depending on the product. Make sure to check the warranty terms carefully, especially regarding coverage for the glass, frames, and seals.
Maintenance requirements will vary depending on the materials used in the frames and glass. For example, timber frames will need regular maintenance, while uPVC frames generally require little upkeep. Ensure you understand what maintenance is required for your chosen product to maximise its lifespan and performance.
Conclusion
Choosing the right double-glazing products for your home requires careful consideration of various factors, including the type of glass, gas fill, frame material, window style, performance ratings, and cost. By prioritising energy efficiency, durability, and the specific needs of your home, you can make an informed decision that will improve comfort, reduce energy bills, and increase your home’s overall value.
Investing in high-quality double glazing is a smart decision that pays off in the long run, providing you with a more comfortable living space, enhanced security, and reduced environmental impact. Always work with trusted suppliers and experienced installers to ensure your double glazing delivers the maximum benefits.
Frequently Ask Question
How Much Does Double Glazing Cost In Australia?
The cost of double glazing varies depending on factors like the size and style of the windows, the type of glass, and the frame material. On average, the cost of installing double glazing in Australia can range from $300 to $1,000 per square metre. While the initial investment may be higher than single-glazed windows, the long-term savings on energy bills can make it a worthwhile investment. It’s advisable to get quotes from multiple suppliers to ensure you’re getting the best value for your budget.
How Long Do Double-Glazed Windows Last?
Double-glazed windows are generally built to last 20-30 years, but this can vary depending on the quality of the installation and the materials used. Well-maintained double-glazed windows can last even longer. It’s important to regularly check the seals and frames for any signs of damage, as these can affect the window’s performance. Replacing worn-out seals or fixing damaged frames can help extend the lifespan of your double glazing.
Are There Any Government Rebates Or Incentives For Installing Double Glazing?
In some Australian states and territories, there are rebates or incentives available to encourage energy-efficient home improvements, including the installation of double glazing. These programs can vary by location, so it’s a good idea to check with your local council or energy efficiency programs to see what rebates or incentives are available in your area. Additionally, installing double glazing can increase your home’s value, which may also have long-term financial benefits.