Enderon Realistic small circle windows new zealand ar 43 ra 5be44b1b 3b5f 4f7e bbba 20b858389145

The Solution for Comfortable Living with Circle Windows

Many Kiwi homes still have single-glazed windows, including distinctive styles like circle windows. These might be charming but offer little insulation, letting unwanted noise in and heat to escape. Retrofitting your circle windows with double glazing can make your home quieter, warmer, and more energy-efficient, while helping to reduce your power bills.

Magnetite provides expert solutions for double glazing for circle windows, improving insulation and reducing noise by up to 70%. Our process works with your existing windows. We assess the current setup, design a customised system, and install it carefully without removing or replacing your original circular window frames.

With over 25 years of experience, Magnetite supports homeowners throughout New Zealand via a trusted network of licensed estimators, fabricators, and installers, primarily serving the North Island.

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Advantages of Double Glazing

Double glazing for circle windows offers significant advantages for homes and offices. It reduces external noise, maintains a more stable indoor temperature, and increases energy efficiency, helping you save on your power bills.

Magnetite’s retrofit double glazing system is award-winning and specifically designed to deliver all the benefits of double glazing without needing to replace your existing windows. This makes it ideal for round or circle windows, helping preserve your home’s unique design while reducing mess, cost, and landfill waste.

Noice ReductionNoice Reduction

Proven Results



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Our window systems have been independently tested by the National Acoustic Laboratories in line with National Fenestration Rating Council (NFRC) regulations. Reduce up to 70% of noise through windows or doors with Magnetite secondary glazing solution.


View Noise Reduction Technical Data
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Our window systems have been independently tested by the Window Energy Rating Scheme (WERS) in line with National Fenestration Rating Council (NFRC) regulations. Improve up to 70% of thermal efficiency of your windows or doors with Magnetite secondary glazing solution.


View Thermal Improvement Technical Data


Why homeowners choose Magnetite

Acoustic & thermal insulation

Our secondary glazing systems are custom built to your needs, offering excellent soundproofing and year-round thermal comfort. Tested and proven, our solutions can reduce noise and improve insulation by up to 70%, including on older aluminium joinery.


Minimal impact to exterior of the homes

Whether you live in a heritage home or a modern apartment, our double glazing enhances comfort and performance without altering your home’s appearance.


Increase property value

Double glazing your existing residential windows, including circle windows, improves comfort, reduces energy use, and adds value to your home.


Sustainable Living

Double glazing for circle windows and older joinery improves energy efficiency, helping regulate indoor temperatures with less reliance on heating and cooling. This lowers your carbon footprint. Retrofitting also reduces waste by making use of existing frames instead of replacing entire windows.


Custom installation

Magnetite’s retrofit systems suit many residential window types, including circle windows, older aluminium joinery, timber sash windows, sliding and casement windows, and skylights.

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