Air Cavity Maximise air cavity for insulation against noise, thermal or both.

Magnetic Seals Create airtight seals, similar to your fridge doors to eliminate noise and draught

Acrylic Glazing 6 times more thermally efficient to keep your home or office cool in summer and warm in winter

A Practical Double Glazing Solution for Sliding Windows in New Zealand Homes

Many New Zealand homes still have single-glazed sliding windows that let in noise and allow heat to escape. For these properties, replacing entire window units can be costly, disruptive, and often requires significant structural work that can affect the look and function of your existing sliding windows.

Magnetite provides an innovative double glazing solution for sliding windows - without the need to replace your existing frames or hardware. Our retrofit system is installed from the inside, making it ideal for sliding windows throughout the home, including living areas, bedrooms, and hard-to-access locations.

With over 25 years of experience, Magnetite delivers proven results with up to 70% improvement in insulation and noise reduction. Our team assesses your sliding windows, designs a tailored solution, and installs it with precision - all while keeping your home's exterior completely untouched.

We work with a trusted network of licensed estimators, fabricators, and installers across Aotearoa, primarily throughout the North Island.

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Advantages of Double Glazing Sliding Windows in New Zealand Homes

Double glazing sliding windows offers a range of benefits for New Zealand homeowners looking to improve comfort without the cost of full window replacement. It improves thermal comfort, lowers energy use, and significantly cuts down on external noise - all while retaining the convenience and functionality of your existing sliding window system.

Magnetite's award-winning retrofit double glazing system is designed to work with existing sliding window frames, including aluminium and timber. It's the perfect solution for homes where replacing sliding windows would be costly or disruptive. Save time, reduce waste, and enhance your home's comfort by retrofitting instead of replacing.

Noice Reduction

Thermal Comfort

Energy Efficient

Fits Existing Windows

Proven Results

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

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

How Magnetite Works

Installation of a discreet Magnetite subframe allows a clear optical grade acrylic panel to attach inside the existing villa windowsill, using continuous magnetic channels to ensure a secure and airtight seal. The magnetic seal ensures that when the Magnetite panels are in place, this villa double glazing system has the lowest air infiltration rate of any operational window. This seal creates an air cavity between the villa's existing windows and your Magnetite panels.

Why Homeowners Choose Magnetite for Double Glazing Sliding Windows

Acoustic & thermal insulation

Our secondary glazing system is customised for each project and delivers excellent noise control and thermal efficiency. It's independently tested to reduce noise and heat loss by up to 70%, which is especially beneficial for sliding windows facing busy streets or exposed to the elements.

No structural changes or exterior alterations

Our system is installed entirely from the inside, making it perfect for sliding windows where preserving the exterior appearance and existing frame is a priority. It maintains the look and function of your sliding windows without any external modifications.

Increase in property value

Retrofitting your sliding windows with double glazing boosts comfort and energy efficiency, helping to improve resale value and reduce ongoing heating and cooling costs.

Sustainable solution

By enhancing thermal performance and reducing reliance on heating or cooling systems, our double glazing sliding windows solution lowers energy consumption and greenhouse gas emissions. Using your existing windows also means less waste and a smaller environmental footprint.

Custom installation

Magnetite's retrofit double glazing is compatible with a wide range of sliding window types and sizes found in New Zealand homes, including single-panel, double-panel, and multi-track configurations. Our systems are custom-fitted to ensure a seamless finish.

Hear From Some Happy Magnetite Customers!

“I’m super impressed with the product and install! Awesome product, I will be recommending to anyone that will listen. Thanks again for being so easy to deal with, and getting it done so quickly.”

Rachel

“I am thrilled with my ‘new’ windows & can honestly say ‘it’s the best investment I’ve made in my house”

Judy

“Already we think the sound difference from these windows is going to be genuinely life changing!”

Strahan

“I love the double glazing!! Thank you for a great job.”

Wendy

“I’ve noticed such a huge difference with the new windows. That room is warm and even this morning when the master was covered in condensation, there wasn’t a single drop on the nursery windows! Super impressed!”

Rhonnie

Thank you and your staff for being so honest and professional with our dealings. I can honestly say it has made a huge difference in the noise production. My husband is a shift worker and sleeps alot during the day and he has found it to be very good at blocking out the outside world.”

Colleen

Excellent to communicate with and delivered as promised. Lovely people and would happily recommend.

Daniel

I noticed a huge improvement immediately from being very cold, damp, noisy, dusty and then heat and curtain damage from the incoming UV rays to being comfortable and generally better health.

Carolyn

Ryan and his team have been awesome, I highly recommend Magnetite and their system to retrofit secondary glazing on older homes.

Maree

Double Glazing Sliding Windows

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