Double-glazed windows, as the name suggests, have two panes of glass with a gap between them that is sealed and filled with air or gas. They are an excellent choice for homeowners looking to enhance comfort levels, reduce outside noise, boost security, cut energy bills, and add value to their property.
Why Choose Double Glazed Windows?
There are several compelling reasons to choose double glazed windows for your home:
The air gap between the two panes of glass acts as an insulator, preventing heat loss during cold winters and heat gain during hot summers. This allows for better regulation of indoor temperatures and eliminates drafts from doors and windows, making rooms more comfortable to inhabit. Studies show that the average heat loss through single glazed windows can be cut down by over 50% by upgrading to double glazing.
The double layers of glass panes with air gaps in between block outside noise considerably. This is extremely useful if you live near busy roads, railways tracks or under airport flight paths. Double glazed windows have high noise reduction coefficients and can decrease external noise by up to 50 decibels, allowing for quieter indoor environments. They are especially effective against traffic sounds, which tend to have a lower frequency.
Forced entry becomes tougher with double glazed windows as the glass used is thicker for holding two panes firmly in place. The window frames also tend to be reinforced and designed specifically to handle the weight of twin glass layers. High-quality double glazing can withstand sustained attack from intruders for over 3 minutes. Additionally, the security locks used on such windows also tend to be more robust.
The insulating air gap between the inner and outer glass panes and advanced perimeter seals preventing moisture ingress allows double glazed windows to last almost two times longer than single glazed ones. The insulated glass units restrict extreme temperature fluctuations, which prevents the frames and glass panes from warping or deteriorating rapidly. The average lifespan of a high quality double glazed window is 35 years.
Lower Maintenance Requirements:
Double glazed windows are less prone to condensation formation on the interior glass surfaces during cold weather which reduces window cleaning requirements. The advanced seals also limit damage to frames and sliding mechanisms caused by moisture. Overall, they have lower recurring maintenance costs compared to single glazed windows.
Added Property Value:
Investing in double glazed windows boosts the resale value of your home substantially compared to those with regular single pane windows. Double glazing is now seen as a premium feature by home buyers rather than an optional upgrade. Real estate agents estimate that installing double glazed windows can increase property valuation by 3 to 5 percent.
Factors Affecting Double-Glazed Window Costs
The cost of installing double glazed windows depends on several factors, including:
Window Size and Frame Material:
Larger windows that withstand higher wind and air pressure require stronger frames. Premium materials like UPVC (unplasticized polyvinyl chloride), composite fiberglass, or powder-coated aluminum increase double-glazing costs considerably compared to basic wooden or PVC frames. Custom sized non-standard window shapes also add to the overall price.
Specialist glass like acoustic, tinted, reflective, self-cleaning, Low-Emissivity (Low-E) and other coated ones with enhanced insulation or noise blocking qualities usually cost more than standard clear double glazing glass. Laminated and tempered glass are also great choices but slightly bump the price. Still, they increase the glass units’ strength, shatter-resistance and protective properties.
Injecting inert gases like argon or krypton in between the two glass layers greatly boosts thermal insulation performance and prevents heat loss. However, they also significantly increase costs over double glazing units just filled with regular air. Around 15 to 20 percent higher pricing for argon filled units can be expected.
Warm Edge Spacers:
These specialized vacuum-sealed frame spacers prevent condensation and fogging at the edges of insulated glass units. They enhance visibility and longevity of double glazed windows but add about 5 to 7 percent to costs.
Getting double glazed windows professionally measured and fitted correctly adds labour and service costs. Complex jobs in older homes with custom-sized windows or requiring sash replacements can further increase price. Additional expenses for repairs, making good old window finishes, and redecorating also need to be considered where applicable.
Average Cost of Double Glazed Windows in Adelaide
The cost of double glazed windows in Adelaide ranges from $800 to $1,500 per square metre, depending on above mentioned cost factors. Industry estimates put the national average cost for double-glazed aluminum window installation at around $365 per square meter. For a standard 1 metre x 1 metre double hung window, buyers can expect to pay between $800 and $1500 based on frame material and glass features.
Examples of Double Glazed Window Prices in Adelaide
Here are some examples of double glazed window prices in Adelaide based on common window sizes and frame materials:
Single Sliding Window (1 meter x 1 meter) – Aluminium Frame: $800 – $1,000
Double Hung Window (1.5 meters x 1.5 meters) – Timber Frame: $1,500 – $2,000
Large Picture Window (2 meters x 2 meters) – UPVC Frame: $2,200 – $2,800
Casement Window (2 meters x 2 meters) – Low-E Glass with Argon Gas Fill: $2,000 – $2,500
Awning Window (1 metre x 0.5 metre) – Standard Clear Glass: $600 – $900
Tips for Saving Money on Double Glazed Windows
Here are some great tips for saving money on double glazed windows without compromising on quality:
- Compare prices from at least 4-5 installers before deciding. Avoid going with the first quote. Get quotes on the same window specifications for fair comparison.
- Consider slightly smaller window sizes to reduce costs. This is especially applicable for multiple windows.
- Install double glazing in living spaces first where most time is spent. Bedrooms can be used later.
- Use a wooden frame base with aluminium cladding rather than full aluminium ones.
- Go for standard clear double-glazing glass unless you specifically need tinted or Low-E ones.
- Opt for air-filled units rather than more expensive argon or krypton gas filling. Upgrade this later if required.
- Choose fixed windows over casements, sliders, or double-hung ones to eliminate opening mechanisms and reduce the price.
- Consider DIY installation if you are adept at home improvement jobs. Get specialist help for tricky parts like the insulated glass units.
- Time the installation in summer or spring to grab out-of-season contractor discounts.
Installing double glazed windows is an investment that can greatly improve comfort, noise insulation, weatherproofing, security, energy savings, and the value of your home. By following the right steps and cost-saving tips outlined above, homeowners can reduce initial double glazing expenditure without compromising on quality, performance, or long-term benefits. Replacing outdated single-glazed windows with modern double-glazing is worthwhile, considering its many advantages.