The Ultimate Guide to Choosing Double-Glazed Windows

5 November 2025
A hand gripping a white handle to open a double-glazed window with frosted glass and a garden view

Choosing the right windows for your home isn’t just about appearance—it’s about improving comfort, efficiency, and value. Nu-Look Windows helps homeowners and builders find the perfect double-glazed windows in Perth for every property style, from modern city homes to coastal retreats. Whether you’re renovating or building new, investing in energy-efficient glazing delivers lasting benefits. The same applies to double-glazed doors in Perth, which complement window systems and enhance overall performance. Let's explore this ultimate guide to choose double-glazed options!

 

Why Double-Glazed Windows Are Worth It

 

Energy costs in Western Australia can rise quickly, especially during hot summers and cool winters. Double-glazed windows create an effective barrier that keeps indoor temperatures stable and reduces reliance on heating or cooling.

 

Key Advantages Include

 

  • Improved Energy Efficiency: The insulating layer between glass panes traps air, reducing heat transfer.
  • Noise Reduction: Perfect for busy streets or high-traffic areas, double glazing significantly lowers sound levels.
  • Enhanced Comfort: Keeps indoor spaces cooler in summer and warmer in winter.
  • Lower Energy Bills: Reduced air-conditioning and heating needs save money over time.
  • Increased Property Value: Energy-efficient homes are more attractive to buyers and renters.

 

By choosing high-quality double-glazed windows in Perth, homeowners can achieve a quieter, more comfortable environment while cutting ongoing energy expenses.

 

Understanding How Double-Glazing Works

 

Double-glazed systems use two panes of glass separated by a sealed air or gas layer. This design limits heat transfer and helps regulate internal temperatures. The sealed unit is also less prone to condensation, keeping your windows clearer and cleaner.

 

For added efficiency:

 

  • Low-E coatings reflect heat while allowing natural light.
  • Argon gas fills improve insulation compared to standard air.
  • Warm-edge spacers minimise heat loss around window edges.

 

These technologies make modern double-glazed windows far superior to traditional single-pane designs.

 

Selecting the Right Frame Materials

 

The frame you choose affects not just the appearance of your windows but also performance and maintenance. In Perth’s varied climate—from hot summers to coastal humidity—durable materials are essential.

 

Common Frame Options Include

 

  • uPVC: Excellent insulation, low maintenance, and cost-effective.
  • Aluminium With Thermal Breaks: Strong and sleek, ideal for modern homes where large glass panels are used.
  • Timber: Offers a warm, classic look and natural insulation, though it requires periodic maintenance.
  • Composite Frames: Combine aluminium exteriors with timber or uPVC interiors for the best of both worlds.

 

Energy Ratings and U-values Explained

 

When evaluating double-glazed windows in Perth, it’s important to understand energy performance ratings. The U-value measures how much heat passes through the window—the lower the U-value, the better the insulation.

 

  • U-Value: Indicates thermal efficiency. Aim for a rating below 2.0 for best results.
  • Solar Heat Gain Coefficient (SHGC): Determines how much solar radiation enters your home.
  • Visible Light Transmission (VLT): Balances natural light and glare reduction.

 

High-performance double-glazed windows with low U-values and balanced SHGC ratings offer excellent comfort throughout the year. They keep interiors cooler in Perth’s summer and retain warmth in winter.

 

Matching Windows and Doors to Your Home Style

A white door with two frosted glass panels and a silver handle next to a frosted window frame

Every property has a unique character. The right window or door style can complement your architecture and improve overall design harmony.

 

For Modern Homes

 

  • Choose large aluminium-framed double-glazed windows with slim profiles for a clean look.
  • Pair them with double-glazed doors featuring wide openings or sliding panels for seamless indoor-outdoor flow.

 

For Traditional Homes

 

  • Opt for timber or composite frames with divided light patterns.
  • Casement or awning styles suit heritage aesthetics while still offering energy efficiency.

 

For Coastal Properties

 

  • Prioritise corrosion-resistant aluminium or uPVC frames.
  • Choose toughened or laminated glass to withstand salty air and strong winds.

 

By matching your glazing style to your home’s design, you enhance both visual appeal and functionality.

 

Importance of Professional Installation

 

Even the best double-glazed windows can underperform if installed incorrectly. Professional installation ensures airtight sealing, precise fitting, and long-term durability.

 

Why You Have to Hire Certified Installers Like Nu-Look Windows

 

  • Accurate Measurements: Every unit is made to fit perfectly.
  • Proper Sealing: Prevents air leaks and water ingress.
  • Structural Integrity: Ensures frames remain square and stable over time.
  • Manufacturer Warranty: Professional installation maintains product warranties.

 

Expert installers handle the entire process, from removing old fittings to sealing new units, giving you peace of mind and lasting results.

 

Comparing Window Styles

 

Different window configurations offer varied benefits depending on ventilation needs and room layout.


  • Sliding Windows: Space-saving and ideal for modern homes.
  • Awning Windows: Great for controlled airflow even during rain.
  • Casement Windows: Provide excellent ventilation and unobstructed views.
  • Tilt-and-Turn Windows: Offer flexibility for easy cleaning and secure ventilation.

 

Each style can be customised with energy-efficient glass and durable frames. Explore design possibilities through our double-glazed windows page for inspiration.

 

Maintenance Tips for Long-Term Performance

 

Although double-glazed windows require little upkeep, periodic checks maintain performance.

 

  • Clean glass with mild detergent and soft cloths.
  • Inspect seals annually for wear or damage.
  • Lubricate locks and hinges to ensure smooth operation.
  • Keep drainage channels clear to prevent moisture build-up.

 

Routine maintenance extends the lifespan of your investment and keeps energy savings consistent.

 

Benefits of Pairing Windows With Double-Glazed Doors

 

Combining efficient windows with matching double-glazed doors enhances insulation across the entire home. Doors play a crucial role in maintaining thermal balance and reducing external noise.

 

Benefits Include

 

  • Seamless design continuity between windows and doors.
  • Improved energy efficiency in open-plan layouts.
  • Enhanced security through multi-point locking systems.
  • Greater comfort with reduced temperature fluctuations.

 

When choosing both, ensure the same glazing specifications and frame finishes for consistent performance.

 

Get Expert Advice and Quality Installation in Perth

 

Ready to upgrade your home with energy-efficient double-glazed windows in Perth? Speak to the professionals at Nu-Look Windows. Our team specialises in tailored solutions for modern, traditional, and coastal homes—combining design expertise with superior installation. Explore double-glazed window options, matching double-glazed doors, or get personalised advice through our contact page. With professional guidance and quality materials, homeowners in Perth can enjoy lasting comfort, efficiency, and style.