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During the colder winter months, everyone's energy bills are higher. To address this, you may want to consider changing your windows to be more energy-efficient. However, double glazing can be too expensive or simply not an option. 

Secondary glazing is a cost-effective alternative to double glazing, especially beneficial for those living in listed buildings or houses where traditional double glazing may not be viable. It doesn't require new windows or frames, making it a versatile solution for improving energy efficiency.

Why not go a step further with a DIY secondary glazing kit? If you're new to secondary glazing kits, we'll guide you through everything you need to know, from the benefits to the different types and maintenance.

What is Secondary Glazing?

Secondary glazing is a cost-effective solution to improving thermal insulation and reducing heat loss in your home. It works in a similar way to double glazing, by adding another layer to your already existing window. Typically, a single-glazed window panel fits behind your existing single or double-glazed window. The small air gap between the two panels adds an extra layer of insulation, helping to slow down heat transfer from one side of the window to the other. 

Unlike double or triple glazing, secondary glazing doesn’t require new windows or frames. Acrylic or polycarbonate plastic is commonly used for secondary glazing because it’s over 10 times stronger than glass. They can be installed as fixed, removable or openable units.

Secondary Glazing DIY

Secondary glazing is not only cost-effective and energy-efficient, but also easy to install yourself with DIY secondary glazing kits. These kits come with everything you need for you to get the job done yourself. It also lets you skip the cost of hiring a professional. They are designed to be simple and easy for you to install, whilst also improving the energy efficiency of your windows. Secondary glazing kits can include:

  • A custom-cut acrylic glazing sheet. These are lightweight and durable sheets, making DIY installation simple.  
  • A flexible PVC or adhesive edging strip. Edging provides a clean finish and can assist frames or tracks to support sliding secondary glazing.
  • A type of sealant to secure panels and manage movement from frames. The sealant must be compatible with the material of the frame.
  • Fixing clips, which are easy to apply and remove. Fixing clips are typically best for curved or arched windows. 

What are the Benefits of Secondary Glazing Kits? 

Secondary glazing adds value to your home. It improves security, reduces noise and minimises condensation. But its biggest benefit is how well it keeps your home warm. By installing secondary glazing, you can increase your home's thermal efficiency by up to 60%, helping you maintain a warm temperature while saving on energy costs. 

Secondary glazing kits can offer many benefits for your home, such as:

Easy Installation

DIY secondary glazing kits are created to be easy to install, allowing homeowners to fit them without professional help. 

Cost-Effective

Secondary glazing kits are usually much more affordable than installing new double or triple-glazed windows, often costing around half the price. It's a great option for improving window performance without a big investment.

Versatility

Not only can they be custom-cut to fit any window shape or size, but most can be easily removed if you need to. 

Improved Insulation

Secondary glazing kits can help to reduce heat loss in your home, lowering energy bills and your carbon footprint.

Noise Reduction

These kits add an extra layer of glazing, blocking out external noise and creating a quieter living space. This is ideal, especially if you live in a noisy area.

The Different Types of Secondary Glazing Kits

There are different types of DIY secondary glazing kits to suit a range of requirements. Some of the most common types include:

Fixed Secondary Glazing Kits

Fixed secondary glazing kits are ideal for fixed windows as they have no moving mechanisms, such as hinges or sliding tracks. They are straightforward to install and are an affordable way to reduce noise and drought in homes. These kits typically include acrylic or polycarbonate sheets that are permanently attached with screws or an adhesive on the inside of existing windows. 

Recommendations: It’s not recommended for you to use fixed secondary glazing where access to the existing window is required. 

Some of the best fixed secondary glazing kits are:

  • Superglaze: Superglaze is a 2-part secondary glazing system for 3mm or 4mm plastic sheets, using screws to fasten it into the window frame. 
  • Easyglaze: Easyglaze is suitable for 2mm plastic sheets and uses adhesive tape to secure it to the window frame.

Sliding Secondary Glazing Kits

Sliding secondary glazing kits are designed for windows that are frequently used and opened. This type of secondary glazing maintains easy access to the existing window and panels can slide horizontally or vertically, depending on the window type. 

Recommendations: They are ideal for sash windows or large wide-opening windows.

Some of the best sliding secondary glazing kits are:

  • TrackGlaze: TrackGlaze is a type of sliding secondary glazing, using PVC double sliding tracks on all four sides of the window. It includes self-adhesive tape and a finger-pull handle for easy use.  

Magnetic Secondary Glazing Kits

Magnetic secondary glazing kits require minimal tools to set up. They work by using self-adhesive metal strips, applied to both the window frame and plastic sheet. The two then clip neatly into place. This type of secondary glazing is also easy to remove and improves your insulation. 

Recommendations: We don’t recommend installing magnetic panels on roof or ceiling lights for safety reasons.

Some of the best magnetic secondary glazing kits are:

  • Magnetglaze: Magnetglaze is a standard magnetic secondary glazing kit available in 5m kits or 30m bulk packs.
  • Magnetglaze Pro: Magnetglaze Pro is suitable for 2, 3 or 4mm plastic sheets and includes neat plastic capping for a clean finish.
  • Magnetglaze Extreme: Magnetglaze Extreme is designed for larger windows and offers a strong grip with 25.4mm magnets.  

How to Choose the Right Secondary Glazing Kit

Choosing the right secondary glazing kit depends on several factors to achieve the best results. Take into consideration:

  • Type of Window: Does your window need to be opened frequently? If not, go for a more permanent solution, such as a fixed secondary glazing kit. However, if you need flexibility, a sliding secondary glazing kit might be more suitable.
  • Budget: Set your budget when choosing a kit. Magnetic and fixed kits are typically more affordable than sliding options, but each type offers value depending on your requirements. 
  • Appearance: Consider how the secondary glazing will look in the space you have. Some kits include covers to hide screws and adhesive strips, while others do not. For instance, superglaze kits include cover snaps to conceal screws for a neat finish.

Maintenance and Care

Once your secondary glazing kits are installed, you’ll be glad to know they are fairly straightforward to maintain and care for. Here's what you need to know to keep your windows in proper order.

How Often Should I Clean Secondary Glazing?

We would recommend cleaning them every few months to prevent dirt build-up or if you notice they have become dirty.

How to Clean Secondary Glazing?

Simply using warm soapy water is sufficient to wipe any dirt away and then dry with a clean cloth. Any small gaps and frames can be cleaned with a small brush.

Buy Secondary Glazing Kits at Sheet Plastics 

Secondary glazing kits are an affordable way to keep your home warm. Enjoy easy installation and added warmth with our range of kits at Sheet Plastics.

We offer custom-cut options to fit your windows perfectly. Visit our website to browse the selection, with clear instructions and videos for each kit. Don’t hesitate to contact us with any questions and our friendly and experienced team will be happy to help.