Monday, March 4, 2024

The Leading 5 DIY Secondary Glazing Kits To Save You Money On Energy

Are you looking for ways to save money on your energy bills? DIY secondary glazing kits might be the perfect solution you’ve been searching for.

These easy-to-install kits offer an affordable alternative to traditional double glazing, insulating your windows and keeping out nasty cold air from your expensively warmed home.

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Dreaded heat loss and noise pollution will be a thing of the past with a DIY secondary glazing kit. Still, with so many options, it can be time-consuming to find the best kit to suit the needs of your home.

That’s why we’ve handpicked our top five DIY secondary glazing kits to reduce energy bills and provide a quick and effective solution to keep your home cosy and comfortable.

Say goodbye to those naughty, draughty windows.

What Are DIY Secondary Glazing Kits

DIY secondary glazing kits are a cheap and effective way for homeowners to improve window insulation, reduce annoying street noise, and increase energy efficiency.

With rising energy costs in the UK and an increased need for soundproofing, these kits have become popular throughout households.

DIY secondary glazing will add a layer to your existing windows, forming a barrier that supports trapping heat and reduces noise transmission.

What Are The Benefits of DIY Secondary Glazing Kits

There are many advantages to installing DIY secondary glazing kits in your home. Take a look below at some of the key benefits:

Energy Conservation

One of the main advantages of DIY secondary glazing kits is that they improve your home’s energy efficiency.

They help to prevent heat loss during the colder months (which is 8 months of the year in the UK!) and also help keep your home cool during the summer months by adding an extra layer of insulation.

All of this will result in significant energy bill savings across the year.

Noise Abatement

Another advantage is the reduction a glazing kit gives you regarding noise pollution, especially if you live in a busy area or on a main road.

DIY secondary glazing kits will add an extra barrier against outside noise, resulting in a quieter and more peaceful environment inside your home. No more barking dogs distracting you during the morning!

Increased Security

Secondary glazing panels can also add a layer of security to your windows, making it more difficult for intruders to enter your home through specific windows.

However, we suggest relying on something other than a glazing kit if you’re worried about security.

Historic or listed building preservation

Double glazing may be unsuitable due to preservation regulations if you live in a historic or listed structure.

In such cases, secondary glazing is an ideal alternative. It not only enhances insulation and energy efficiency but also preserves the original character and appearance of the building.

DIY secondary glazing is a practical and cost-effective solution for such homeowners.

The Top 5 Best-Rated DIY Secondary Glazing Kits

We’ve compiled a list of the top 5 best-rated DIY secondary glazing kits to help you decide when buying the right product.

Duck Indoor Shrink Film Insulation Kit

Super Easy to Install Onto Your Windows

Transparent Film to Provide Invisibility

Provides Extra Insulation and Reduces Drafts Coming Through Your Windows

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Windows are a significant source of energy waste during the colder months.

We expected a complicated process and a flimsy product. Still, the Duck Indoor Shrink Film Window Kits undoubtedly exceeded our expectations and delivered well on its promises.

The initial setup required a slight learning curve, but we quickly got our head around the process when we reached the third window.

Although the film is slightly visible with edges that are less pleasing to the eye, it is an effective product for keeping the cold out, especially on draughty sash windows. However, it can only partially replace double glazing and shouldn’t be considered a long-term solution.

We’ve also noticed a considerable drop in condensation and a significant reduction in outside noise, which is fantastic.

The product in the box was very generous, providing a few extra centimetres than advertised, and the amount of tape included was more than enough.

While the roll-on method proved pretty straightforward, it did require precision to ensure the top edge was at the right angle for a straight run along the window without missing the tape.

One minor drawback is the potential waste when cutting through the folded film on the right edge, which could have been used for another window.

Our takeaway:

This product is a solid, practical solution for improved insulation and comfort. We love the Duck Brand’s other products. Still, this one was ultimately the best, and we definitely rate this as our top secondary glazing kit.

Purchase Here

DUCK Rolled Shrink Film Window Kit

Adhesive Tape Included For Decent Attachment

 Suitable For Various Window Sizes

Again, Super Easy To Install

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Next on our list are the Duck-Rolled Window Kits, which we certainly recommend, especially if you have single glazing.

Working with this product during the fitting process took time as it tended to adhere to itself, making a straight-cut challenging.

However, the results are definitely worth the effort. After fitting the product, ensure a tight seal and leave it overnight. I used a hairdryer to ensure it was dry and fixed for that final touch.

The benefits are noticeable; again, there’s minimal condensation, a significant improvement in heat retention within the room we tested in, and a noticeable enhancement in sound insulation. We could barely hear the cars on the main road outside.

The film is also very discreet, although we noticed a slight haziness. This is expected when applying a product like this to your windows.

Our takeaway:

Overall, we were happy with this product and ranked it second. Once we got over the initial finicky setup, it was easy to use and looked good once finished.

Purchase Here

Frost King Clear Indoor Shrink Window Kit

The Film is Highly Durable and Won’t Damage Easily

Suitable For All Standard Windows In Your Home

A Pack Of 9

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In third position is The Frost King Clear Indoor Shrink Window Kit, and this is a worthy bronze winner.

Managing the interior windows presented no challenge when applying the product; it was a reasonably straightforward process, and using a hair dryer effectively smoothed out any ripples left, resulting in a pleasant and clear view through the glass.

The entire process of applying it to three windows took around 20 minutes overall, and we got into the flow very quickly, completing the room in just over half an hour.

The only major drawback for us is if you intend to open your windows during the warmer months of the year, which, let’s face it, everybody does, you must remove them; otherwise, as stated, sunlight and ordinary wear can cause the tape to fail over time.

Our takeaway:

Due to this, we rank this in third position. It’s a good and very straightforward bit of kit, but removing it if you want to use your window can be a significant pain.

Purchase Here

Duck Extra Large Window/Patio Door Shrink Film Kit

Keeps Out Drafts and Cold Air Very Well

Easy Installation

Generous Film Size

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Rocking in at fourth is the Duck Window/Patio Door Kit. It’s another decent product from the Duck brand.

When purchasing this kit, you will receive an 84 x 120-inch sheet of crystal-clear plastic film and a 1/2-inch x 36-foot (432-inch) roll of double-sided tape designed to insulate one extra-large window or patio door.

The plastic film is solid, and the double-sided tape is easy to apply and remove without leaving any marks on your window or door frame.

We found it was a faff to cut to size, but eventually, we laid it down on the floor, folded it where the cut was needed, and then used a sharp blade.

Installation was easy; just double-sided tape on the edges of the window frame and using a hairdryer to finish.

Our takeaway:

This was definitely a lot more demanding to use, and it took us a long while to get a sound system in place to allow us to apply it to our windows efficiently. Otherwise, it is a good quality product.

Purchase Here

Duck 3-Window Insulation Kit

Improves energy efficiency

Reduces condensation

Suitable for three standard-sized windows

Check Price

Coming in fifth and our final recommendation is the Duck’s indoor Roll-On Window Insulation Kits.

This roll-on product is much easier than the measure, cut, and stick process we followed with the other four, where we took care to prep our surfaces carefully.

You do have to ensure your surfaces are absolutely squeaky clean, though. We used rubbing alcohol with a paper towel, and this took quite a considerable time to get right.

We put all the tape on our windows but only removed the protective top once the film rolled on the top and unfolded, which was undoubtedly a time saver.

We also ran the hair dryer over the edges and pressed the film firmly to the tape with our fingers while we were shrinking the film. The results are pretty good, and the windows look clean.

Our takeaway:

This one comes in at number five. The prep work took us a good while before applying the product. Other, easier-to-use kits are listed above, but this still works great.

Choosing the Right Glazing Panels for Your Needs

Remember when picking out your lighting panels for your DIY secondary glazing project.

You’ll want to consider what material the panels are made of, how thick they are, and what kind of glazing system you plan to use.

Look at all your options and choose the ones that work best for you and your project.

Sheet of Plastic

Plastic sheet panels are lightweight, affordable, and simple to cut to size. Depending on your requirements, they are available in 2mm, 3mm, and 4mm thicknesses.

They are ideal for do-it-yourself projects because they are easy to install with magnetic or stick-down systems.


Glass panels provide exceptional clarity and durability. They are available with single or double glazing, with double glazing providing more insulation.

Due to their weight and fragility, glass panels are typically used in screw-secured or sliding systems and may necessitate professional installation.


Acrylic panels are lightweight and shatterproof, made of Perspex or Plexiglas.

They are effective at noise reduction and insulation.

Acrylic panels come in various thicknesses and can be used with magnetic or stick-down systems.

Understanding the Different Types of DIY Secondary Glazing Systems

DIY secondary glazing kits are available in various styles, each with its features and benefits. Let’s look at the various types of DIY secondary glazing systems:

Magnetic Devices

Magnetic systems rely on solid magnets to keep secondary glazing panels in place. They provide a secure fit and are simple to remove for cleaning or ventilation. Magnetic systems can be used with both plastic sheets and glass panels.

Sliding Doors

For easy access to the existing window, sliding systems allow you to move the secondary glazing panels horizontally or vertically.

They are ideal for windows that must be opened and closed regularly. Plastic sheet panels are frequently used with sliding systems.

Screw-Located Systems

Screw-secured systems entail screwing the secondary glazing panels to the existing window frame.

This type of system is more permanent and provides excellent security. Screw-secured systems are appropriate for glass panels and are frequently used in commercial buildings or high-security areas.

Sticking Systems

Stick-down systems attach the secondary glazing panels to the existing window frame with adhesive tapes or velcro strips.

This system is simple to install and requires no drilling or screwing. Plastic sheets or acrylic panels are frequently used with stick-down systems.

A Step-by-Step Fitting Guide for DIY Secondary Glazing Kits 

DIY secondary glazing kit installation is a simple process that can be completed in a few simple steps. To help you achieve the best results, here is a step-by-step fitting guide:


To ensure a clean and smooth surface for installation, thoroughly clean the existing window frame.

Measure the window’s dimensions to determine the size of the secondary glazing panels needed.

Ordering and Measuring

  • Take precise measurements of the window frame, allowing for any clearances that may be required.
  • Select the appropriate size and type of DIY secondary glazing kit based on your measurements.
  • Getting the Existing Window Ready
  • Remove any existing window treatments like curtains or blinds.
  • To ensure a clear and unobstructed view, clean the window glass.

Fitting the Secondary Glazing Panels

  • Follow the instructions that came with your DIY secondary glazing kit.
  • Install the glazing panels with the system of your choice (magnetic, sliding, screw-secured, or stick-down).
  • Adjust the panels and check for gaps or air leaks to ensure a snug fit.

Sealing and Finishing Touches

  • To create a tight seal, wrap weather stripping or sealant around the edges of the secondary glazing panels.
  • Trim any excess material to achieve a neat and professional look.
  • To ensure the windows work properly, open and close them several times.

DIY Secondary Glazing Kits

Maintaining and Cleaning Your DIY Secondary Glazing

Regular cleaning and maintenance are required to ensure the longevity and effectiveness of your DIY secondary glazing. Here are some pointers to remember:

  • Regularly clean the glazing panels with a mild detergent or glass cleaner.
  • Use abrasive materials or harsh chemicals sparingly, as they may damage the panels.
  • Check the weather stripping and seals regularly and replace them as needed.
  • Inspect the frames and fixings for wear or damage and make any necessary repairs.

Frequently Asked Questions About DIY Secondary Glazing Kits

Q: Can I install DIY secondary glazing on my own?

A: Yes, DIY secondary glazing kits are easy to install and can be done by dads with basic DIY skills. If you are unsure or uncomfortable with the installation process, it is best to seek professional help.

Q: How much noise reduction can I expect from DIY secondary glazing?

A: With an average 50-70% reduction, DIY secondary glazing can significantly reduce noise transmission. The noise reduction is determined by several variables, including the type of glazing panels used and the thickness of the secondary glazing system.

Q: Will DIY secondary glazing affect the appearance of my windows?

A: DIY secondary glazing is intended to be discreet and unobtrusive. The secondary glazing panels can be customised to match the style of your existing windows, ensuring a seamless integration with your home’s overall aesthetics.


DIY secondary glazing kits are a practical and affordable way to improve insulation, reduce noise, and boost energy efficiency in your home. You can select the best glazing panels and systems for your needs from various options.

You can confidently install DIY secondary glazing and enjoy the benefits of a more comfortable and peaceful living environment by following our step-by-step fitting guide and considering real-life case studies.

Don’t let noise pollution and high energy bills be a constant source of frustration in your home – invest in DIY secondary glazing kits and transform them.

DIY Secondary Glazing Kits

Thank you for reading our article on the best 5 DIY secondary glazing kits. We hope you enjoyed it. For further handydad advice and tips around the house, go check out our blog HERE.

Disclaimer: This post contains affiliate links. If you purchase through these links, we may earn a commission at no additional cost.



I'm Chris, and my life revolves around two profound passions: embracing the joys of fatherhood with my energetic 2-year-old son and channelling my skills into transforming every nook and cranny of our home.
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