Thermally broken Window & Door Replacements

Custom-made for New Zealand homes and expertly installed with superior materials for better thermal performance.
At Number One Windows & Doors, we specialise in the replacement of old or damaged windows and doors for homes across New Zealand. Whether you're upgrading for thermal performance, security, or street appeal, our expert team installs custom-made solutions to match your home perfectly.

Our partnerships with Metro Performance Glass and Omega Windows and Doors give you access to industry-leading options like the 300 and 800 Series — purpose-built for New Zealand conditions.
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Better insulation
Lower power bills
Noise reduction
Reduce condensation
UV protection
Better insulation
Lower power bills
Noise reduction
Reduce
condensation
UV protection
Better insulation
Lower power bills
Noise reduction
Better insulation
Lower power bills
Noise reduction
Reduce
condensation
UV protection
Better insulation
Lower power bills
Noise reduction

Why replace your windows and doors?

  • Boost energy efficiency: Reduce heating and cooling bills with modern thermally broken frames and double glazing.
  • Let in the light: Upgrade to larger, clearer glass areas with both contemporary and modern designs that invite in natural light.
  • Reduce noise: New double glazed aluminium windows and doors provide increased sound reduction, resulting in a more comfortable and peaceful home.
  • Increase security: Advanced locking mechanisms and stronger profiles protect your home better.
  • Refresh street appeal: Clean lines, modern or contemporary finishes, and perfect symmetry give your home a premium look.

300 Series (quality meets affordability)

  • Cost-effective window and door replacement solution.
  • Available in a wide range of styles (awning, casement, sliding, stacking, bi-parting, hinged, french door and bi-fold).
  • Precision aluminium frame design ideal for all residential properties.
  • Designed for 24mm high-performance double glazing.
  • Perfect for homeowners looking for value and durability.
  • Easy to maintain, built to last in New Zealand's harsh environment.
300 Series Technical
Glasshouse project

800 Series (for thermal excellence)

  • Engineered for superior condensation reduction.
  • Modern, contemporary and architectural styling — clean lines and smooth operation.
  • Meticulously designed for all home applications.
  • Excellent for homes with large window and door openings.
  • High performance glass options to suit all needs.
  • Built to meet high-performance building standards.
800 Series Technical

Residential and replacement installation experts

Number One at Windows

Whether you're after standard non-thermal options or thermally broken frames for superior insulation, we offer a full range of window styles — including awning, casement, sliding, bi-fold, and fixed windows — all double-glazed for maximum energy efficiency, noise reduction, and year-round comfort. Every window is custom-measured, precision-installed, and built to handle Canterbury’s diverse climate, with sleek modern finishes and low-maintenance durability.

Windows

Number One at Doors

From the reliable Omega 300 Series to the high-performance, thermally broken 800 Series, our doors are built for style, durability, and insulation. Choose from hinged, French, sliding, stacking, or bi-fold configurations — all double-glazed to enhance energy efficiency, reduce noise, and provide year-round comfort. Every door is custom-made to suit your space and lifestyle, with sleek profiles, smooth operation, and finishes that complement your home. Whether you're building new or upgrading tired joinery, we handle the full process — from consultation to installation.

Doors

Number One at Conservatories

Whether you're adding to an existing property or building new, a conservatory offers the perfect, temperature-controlled space between indoors and out — ideal for dining, relaxing, working, or simply soaking up the sun. Our conservatories are built with high-performance double glazing and modern aluminium joinery for year-round comfort, thermal efficiency, and lasting durability. More than just an extra room, a well-designed conservatory floods your home with natural light, boosts property value, and creates a warm, versatile space you’ll use every day. Custom-designed to suit your home and lifestyle, we manage the process from concept to completion — delivering light, space, and comfort.

Conservatories

Number One at Replacements

At Number One Windows and Doors, we’re your local window replacement specialists, trusted by homeowners across Christchurch and Canterbury. We remove outdated, inefficient joinery and replace it with high-performance, double-glazed aluminium windows built to suit your home and climate. Whether it’s a like-for-like retrofit or a full replacement using Omega’s 300 or 800 Series systems, we ensure a smooth process from consultation to install — with minimal disruption and maximum thermal comfort. Backed by trusted suppliers and expert workmanship, we make replacing your windows a smart, long-lasting investment in your home.

Replacements

800 Series

We proudly supply and install the full Omega 800 Series – a premium, thermally broken aluminium joinery system designed for superior performance in Canterbury’s varied climate. Ideal for both residential and architectural builds, the 800 Series offers enhanced energy efficiency, strength, and design flexibility, making it perfect for modern homes that demand comfort and durability.

800 Series Technical

300 Series

we offer the trusted and versatile Omega 300 Series – a reliable aluminium joinery system ideal for residential homes and renovations throughout Christchurch and Canterbury. Designed as a non-thermally broken suite, the 300 Series delivers excellent durability, clean modern lines, and seamless functionality at an affordable price point.

300 Series Technical