Secondary Glazing Cost and Guide

secondary glazing


Secondary glazing typically costs between £685 and £1,057 

Secondary glazing is twice as cheap as double glazing in some cases

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Double glazing can add a cosy layer of warmth to your home. Although this sounds tempting, its main downfall is the pricetag – but this is where secondary glazing swoops in to save the day.

Secondary glazing is a great alternative for those that can’t quite afford double glazing. It’s cheaper, just as effective, and – if carried out properly – can be fitted yourself. Read on to learn the ins and outs of secondary glazing, including cost, companies and providers, and how to do it yourself. If you’d like to skip the secondary glazing and reap all the benefits of double glazing, you can get in contact with our suppliers. Once you complete your details on the form, our professionals will be with your shortly.

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Secondary glazing

What is secondary glazing?

Secondary glazing involves installing a pane of glass and frame to existing windows. Unlike double glazing, which would remove a single glazed window and replace it, secondary glazing is added to the existing window.

Secondary glazing’s most attractive benefits are its energy insulation and the soundproofing it offers to your home. On top of this, it’s also a cheaper solution to double glazing and is a good option if you can’t replace existing windows, due to living in period or listed properties.

Did You Know?

Secondary glazing is fairly easy to install yourself.

Although you are technically adding a pane of glass to your existing windows, secondary glazing can be slim and discreet using a strong but lightweight aluminium frame to hold it in place. You can also open and close secondary glazing as you would a normal window.

Secondary glazing is fairly easy to install yourself and can be bought with DIY kits. This will again lower the cost and avoid installation fees as you would have with double glazing.

How much does secondary glazing cost?

On average the secondary glazing can cost anywhere between £100 to £200 per pane – but this will depend on several factors, including the number of windows you need to install and the type of window you have. It will also depend on whether your motivation is mainly for noise or draft proofing. Noise reduction proofing requires a particular type of glass which is slightly more expensive.

It’s worth getting a few quotes from different installers to find the best deal for you – and if you fill in this form, you can do exactly that.

The following prices are examples of what you can expect to pay for secondary glazing:

Amount of windows
Average cost
Duration of job
4 windows
1 day
8 windows
1 day
12 windows
1-2 days

Prices sources from

Secondary glazing costs vs double glazing costs

In comparison to installing double glazing, secondary glazing typically works out cheaper and is quicker to fit.

Compared to the average £100 – £200 to install secondary glazing, you can expect to spend around £250 and £400 for double glazing. So if you are bent on saving and have some room to play with, secondary glazing may be your best bet.

Cheap secondary glazing options

If you’re trying to keep the price down on your secondary glazing, you can opt for certain materials. The lowest cost option is uPVC, with aluminium and wood at the most expensive end of the scale. You may also want to look at different types of glass – generally speaking, the thicker, the pricier.

The cheapest type of secondary glazing is draft reducing glass, with prices between £685 and £870. Secondary glazing that reduces noise needs more substance, is therefore most expensive – usually costing between £895 and £1,057 per pane.

Magnetic secondary glazing

Another cheap option is to use magnetic secondary glazing. This is quick and simple to install but still promises the same insulation and noise reduction benefits as permanent secondary glazing. It also costs less than other secondary glazing solutions.

As the name suggests, this glazing uses magnets to attach to the pre-existing window frame. The magnetic strips are self-adhesive and can match the colour of your window so that you do not see them should you remove and store them during warmer months.

The material used to make magnetic secondary glazing is typically P.E.T. (Polyethylene terephthalate) which is a recyclable plastic.

Magnetic secondary glazing can be attached and removed fairly easily which could come in handy during the summer months. Unlike permanent secondary glazing, they do not have the opening and closing function but must be removed in their entirety to open the window.

Which companies supply secondary glazing?

There are a handful of national, double glazing companies – but who are the topdogs for secondary glazing?


Everest have been in operation since 1965 and produce secondary glazing solutions and installation.

Their frames are made of aluminium and cater for sliding sash windows or hinged systems. Their secondary glazing solutions all come with a 10 year guarantee.

Anglian Secondary Glazing

Anglian have been manufacturing and installing home improvements for 50 years with their British made products.

They make bespoke secondary glazing for all window styles including sash windows. These can be sliding, tilting or hinged systems.

Clearview Secondary Glazing

Clearview is a privately owned business which has been designing and manufacturing secondary glazing systems for over 20 years, in the commercial, residential and heritage and listed building markets.

They produce vertical sliding secondary glazing or hinged systems and can also design bespoke solutions for sash windows for heritage or listed properties.

Is secondary glazing right for you?

There are five factors to consider when choosing whether to install secondary glazing:

  1. You live in a period or grade I or II listed building where you are not permitted to install double glazing.
  2. You cannot get planning permission for double glazing installation. Secondary glazing installation does not require planning permission, and can easily be installed by homeowners themselves.
  3. You want to retain your original windows, and do not want to alter the external look of your building with modern-looking double glazing. Secondary glazing solutions are fit on the interior of the existing window and can come in discreet styles and means of opening for easy access.
  4. You are on a budget. Secondary glazing is considerably less expensive to install than double glazing. This would suit homeowners on a smaller budget who want to conserve energy but require a cheaper solution. You can also reduce costs by fitting the secondary glazing yourself and eliminating installation costs.
  5. You live on a busy road or in a built-up area. Secondary glazing is more effective at reducing noise pollution than double glazing. This is because there is a larger space between the existing window and the secondary glazing which is better at lowering sound levels than the two sealed panes within double glazing which are closer together.

Next steps

Feeling more sussed on secondary glazing? If you’re ready to warm your home a little more, get in contact with a company that you’re comfortable with.

If you think your home needs more than secondary glazing, double glazing is a worthwhile investment. You can look forward to heating your home in a more eco-friendly way, being protected from intruders, and removing any unwanted outside noise. You can compare double glazing quotes by getting in contact with our proffessional suppliers.

Whatever option you go for, you can look forward to coming home to a warm, welcoming home.

Jonathan Whiting

An eco hero with a head for numbers, Jon’s data visualisation skills are legendary. Whether it’s determining what countries will survive climate change or the animals most at risk from it, he has the planet’s best interests at heart.