Window Double Glazing | North Canterbury, NZ

Retrofit Double Glazing for Better Comfort and Savings

At Window and Door Accessories, we provide cost-effective double glazing solutions using the proven MagicSeal Secondary Glazing system. Serving North Canterbury, NZ, Christchurch City, Kaikoura, and the West Coast, we help homeowners upgrade their existing windows for improved thermal insulation, noise reduction, and overall comfort — without the cost and mess of full window replacement.

Why Choose Retrofit Double Glazing?

Upgrading to double glazing is one of the best investments you can make for your home’s comfort and energy efficiency. With MagicSeal’s unique magnetic sealing system, we can retrofit your current windows to deliver the benefits of standard double glazing:

Save on Heating & Cooling

Significantly reduces heat transfer, lowering energy bills and helping maintain a consistent indoor temperature.

Reduce Condensation

Minimise cold spots and prevent the buildup of moisture, mould, and mildew on your windows and drapes.

Enjoy a Quieter Home

Cut down on noise from traffic, neighbours, and other outdoor sources — creating a more peaceful living environment.

How It Works

MagicSeal Secondary Glazing is crafted from premium UV-stabilised acrylic and high-performance plastics. It is installed on the inside of your existing windows and held securely in place with MagicSeal’s discreet magnetic system. This creates an insulated layer of still air that:

Reduces convective heat loss, keeping warm air inside during winter and hot air out during summer.
Acts as an effective sound baffle, dampening external noise so your home stays calm and quiet.

An Affordable, Hassle-Free Upgrade

Replacing your entire window units can be disruptive, costly, and time-consuming. With MagicSeal, there’s no need to remove frames, refit architraves, or alter window furnishings. Our retrofit solution installs quickly and cleanly, giving your windows a new lease on life for a fraction of the cost of full replacement.

Acoustic & Thermal Benefits Explained

Noise Reduction

A 10 dB drop in noise level can be perceived as halving the volume — so even a modest reduction makes a big difference in comfort.
Windows are often the weakest point for noise infiltration, so adding MagicSeal can provide noticeable relief from unwanted sound.

Thermal Insulation

MagicSeal slows both convection (air movement) and conduction (heat transfer through glass).
The trapped air layer limits heat escaping in winter and reduces heat gain in summer, improving your home’s energy efficiency.
By stabilising window surface temperatures, condensation is also reduced, keeping interiors healthier and drier.