Draughty windows can make homes, offices and workplaces uncomfortable, particularly during the colder months. Replacing existing windows can be expensive, and in some situations, installing entirely new glazing simply isn't practical.
Magnetic secondary glazing offers a simple, removable alternative that can help reduce draughts and improve comfort without replacing existing windows.
But how does magnetic secondary glazing work, and is it suitable for your windows?
In this guide, we'll explain how magnetic secondary glazing works, its benefits, where it can be used and how the right magnetic fixing kit can make installation easier.
What Is Magnetic Secondary Glazing?
Magnetic secondary glazing is a system that uses magnetic strips to attach an additional transparent panel to an existing window frame.
Rather than replacing the original glass, a secondary panel made from a material such as acrylic or Perspex is positioned on the inside of the window.
A magnetic fixing system holds the additional panel in place, creating an air space between the original window and the secondary glazing.
When correctly fitted, this additional layer can help reduce draughts and heat loss through the window.
One of the main advantages is that the panel can be removed when required, making magnetic secondary glazing particularly useful for seasonal installations and windows that need occasional access.
How Does Magnetic Secondary Glazing Work?
Magnetic secondary glazing works by using two compatible strips that attract one another.
Typically, the system consists of:
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Flexible magnetic tape – attached to the removable glazing panel.
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Steel tape – attached to the existing window frame.
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Secondary glazing panel – a transparent acrylic, Perspex or similar suitable plastic sheet.
When the panel is positioned against the window frame, the magnetic tape attracts the steel strip, helping hold the panel in place.
The result is a removable secondary glazing panel that can be installed without conventional hinges or permanent mechanical fasteners.
The effectiveness of the installation depends on the quality of the fit, the condition of the surfaces and how well gaps around the panel are controlled.
Can Magnetic Secondary Glazing Reduce Draughts?
Yes. Properly installed magnetic secondary glazing can help reduce draughts by creating an additional barrier between the room and the existing window.
Older windows can allow cold air to enter through small gaps around frames and glazing.
By installing a secondary panel with a close-fitting perimeter, you can help limit unwanted air movement.
This can be particularly beneficial for:
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Older properties
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Single-glazed windows
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Home offices
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Workshops
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Commercial buildings
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Rooms affected by cold draughts
However, magnetic secondary glazing should not be considered a guaranteed solution to every draught problem. Its effectiveness depends on the window condition, panel design and installation quality.
Does Magnetic Secondary Glazing Improve Insulation?
Magnetic secondary glazing can improve thermal performance by introducing an additional glazing layer and an insulating air space.
This can help reduce heat transfer through the window.
The level of improvement depends on several factors, including:
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The existing window construction
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The thickness and type of secondary panel
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The distance between the two glazing layers
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The quality of the perimeter seal
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The overall installation
While magnetic secondary glazing is not identical to installing new double glazing, it can provide a practical improvement where full window replacement isn't desirable.
Why Choose Magnetic Secondary Glazing Instead of Replacing Windows?
Replacing windows isn't always the most practical option.
For some properties, the cost of replacement can be significant. In others, retaining the original windows may be important for architectural or aesthetic reasons.
Magnetic secondary glazing offers several advantages.
Removable Installation
One of the biggest benefits is the ability to remove the secondary glazing panel when required.
This makes it easier to access the original window for cleaning or maintenance.
Minimal Changes to Existing Windows
Magnetic fixing strips can be attached to suitable window frames without drilling fixing holes.
This can make the system useful where a less invasive installation is preferred.
Suitable for DIY Projects
Magnetic secondary glazing systems can be suitable for DIY installation when the correct materials and preparation methods are used.
Seasonal Flexibility
Some homeowners may prefer to install secondary glazing during colder months and remove it during warmer weather.
Cost-Effective Alternative
Depending on the window and materials selected, magnetic secondary glazing can offer a lower-cost alternative to replacing the entire window.
Can You Install Magnetic Secondary Glazing Yourself?
Yes. Many magnetic secondary glazing systems are designed to make installation relatively straightforward.
The process generally involves:
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Measuring the existing window and deciding where the secondary panel will sit.
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Cutting a suitable acrylic or plastic glazing panel to size.
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Cleaning and preparing the window frame and panel surfaces.
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Cutting the magnetic and steel strips to the required lengths.
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Applying the strips in accordance with the manufacturer's instructions.
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Positioning the secondary panel against the frame.
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Checking that the panel fits securely and can be removed when required.
Care should be taken to ensure the adhesive is compatible with the surfaces and that the frame and panel can adequately support the installation.
Larger or heavier panels may require additional consideration or a different fixing arrangement.
Introducing the Eclipse Magnetics Magnetic Secondary Glazing Kit
At Eclipse Magnetics, we offer a practical magnetic fixing solution designed for removable secondary glazing, flyscreens and display applications.
Our Magnetic Secondary Glazing Kit combines flexible magnetic tape with matching white-coated steel strip to create a convenient removable mounting system.
The kit is available in two versions.
Standard Magnetic Secondary Glazing Kit
The Standard Kit includes:
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12.7mm wide magnetic tape
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13mm wide steel tape
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30 metres of each strip
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White finish for a discreet installation
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Adhesive-backed materials for convenient fixing
This option is suitable for applications where a narrower magnetic fixing strip is appropriate.
Wide Magnetic Secondary Glazing Kit
The Wide Kit includes:
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25.4mm wide magnetic tape
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25mm wide steel tape
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30 metres of each strip
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White finish
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Wider contact area for suitable larger-panel applications
The wider format provides additional contact area, although suitability still depends on the panel size, weight and installation conditions.
Both kits can be cut to the required length, allowing the magnetic strips to be adapted to different window dimensions.
Please note: Acrylic, Perspex and other secondary glazing panels are not included and must be purchased separately.
What Else Can Magnetic Glazing Strips Be Used For?
Although primarily designed for secondary glazing, magnetic fixing strips can be useful in several other applications.
Removable Flyscreens
Magnetic fixing systems can be used to attach suitable flyscreen panels to window frames.
This allows screens to be removed for cleaning, maintenance or seasonal storage.
Temporary Signage
Magnetic strips can provide a removable fixing method for suitable lightweight signs and display panels.
Retail and Exhibition Displays
Magnetic mounting can be useful where panels need to be repositioned or replaced regularly.
Protective Screens
For suitable lightweight non-safety-critical applications, magnetic strips can provide a convenient way to attach removable protective panels.
What Should You Consider Before Installing Magnetic Secondary Glazing?
Before choosing a magnetic glazing system, consider the following:
Window frame material: Check that the adhesive strips are suitable for the frame surface.
Panel weight: The magnetic fixing system must be capable of supporting the selected glazing panel.
Surface preparation: Clean, dry and suitable surfaces are essential for reliable adhesive performance.
Panel dimensions: Larger panels may require a wider contact area or additional support.
Access requirements: Consider whether the original window needs to open regularly.
Ventilation: Avoid obstructing required ventilation openings or escape routes.
Moisture: Poorly designed installations can trap moisture, so condensation and ventilation should be considered.
Taking these factors into account can help achieve a more reliable installation.
Is Magnetic Secondary Glazing Suitable for Older Windows?
Magnetic secondary glazing can be particularly useful for older windows where replacing the original glazing is undesirable.
For example, it may be considered for traditional timber windows or single-glazed frames where a removable secondary panel is preferred.
However, older frames may have uneven surfaces, damaged paint or other conditions that affect adhesive performance.
Listed buildings and properties subject to conservation restrictions may also require additional checks before alterations are made.
Is Magnetic Secondary Glazing Worth It?
For many suitable applications, magnetic secondary glazing can be a practical way to improve window comfort without undertaking a complete window replacement.
Its main advantages include:
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Helping reduce draughts
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Providing an additional glazing layer
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Removable panels for cleaning and maintenance
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Minimal alteration to existing window frames
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Flexible installation options
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Potentially lower costs than replacing windows
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Suitability for a range of DIY projects
The key is choosing appropriate materials and ensuring the secondary panel is securely and correctly installed.
Final Thoughts
How does magnetic secondary glazing work?
It uses magnetic tape and matching steel strip to hold an additional glazing panel against an existing window frame.
This creates a removable secondary layer that can help reduce draughts and improve comfort without requiring complete window replacement.
Whether you're improving an older window, creating removable flyscreens or developing a custom glazing project, magnetic fixing strips offer a versatile solution.
With Standard and Wide options available, the Eclipse Magnetics Magnetic Secondary Glazing Kit provides a convenient starting point for creating your own removable glazing system.
Explore the Eclipse Magnetics Magnetic Secondary Glazing Kit and discover a practical magnetic fixing solution for your next project. Buy Now
