Secondary Glazing

Secondary glazing is an effective and discreet way to improve insulation, reduce noise, and enhance comfort in UK homes without replacing existing windows. It is particularly popular for period properties, listed buildings, and homes in busy or noisy areas where original windows must be retained.

What Is Secondary Glazing?

Secondary glazing involves fitting a slim, internal window pane on the inside of your existing window. This creates an insulating air gap between the original window and the secondary pane, significantly improving thermal and acoustic performance while preserving the external appearance of the property.

Key Benefits

Improved Thermal Insulation

By creating an additional barrier against heat loss, secondary glazing helps keep your home warmer in winter and cooler in summer, reducing energy bills.

Excellent Noise Reduction

Secondary glazing is highly effective at reducing external noise, making it ideal for homes near busy roads, railways, airports, or city centres.

Preserves Original Windows

Perfect for period properties and listed buildings, secondary glazing allows you to retain original timber sash or casement windows while upgrading performance.

Cost-Effective Solution

Secondary glazing is often more affordable than full window replacement, offering significant improvements at a lower cost.

Enhanced Security

The additional internal pane provides an extra layer of protection, helping to deter intruders.

Types of Secondary Glazing

Secondary glazing systems can be tailored to suit different window styles and access requirements:

Vertical Sliding Secondary Glazing – Ideal for sash windows, maintaining traditional operation.
Horizontal Sliding Secondary Glazing – Suitable for wide windows and Yorkshire sash styles.
Lift-Out Panels – A removable option, often used where occasional access is required.
Hinged Secondary Glazing – Opens like a door for easy cleaning and ventilation.
Fixed Secondary Glazing – Best for windows that do not need to be opened.

Secondary Glazing for Period & Listed Buildings

Secondary glazing is often the preferred solution for listed buildings and properties in conservation areas, as it does not alter the external appearance. It can be designed to be fully reversible and visually unobtrusive, helping to meet local authority and heritage requirements.

Energy Efficiency & Building Regulations

Secondary glazing can help homes meet improved energy efficiency standards, although it is treated differently from full double glazing under UK building regulations. In most cases, secondary glazing does not require planning permission and is exempt from FENSA certification, making installation straightforward.

Discreet Design & Finishes

Modern secondary glazing frames are slim and available in a range of finishes, including white, black, and custom colours. When professionally installed, they blend seamlessly into the interior and are barely noticeable.

Is Secondary Glazing Right for Your Project?

Secondary glazing is ideal if you want to improve warmth, reduce noise, or enhance security without replacing your existing windows. It is especially suitable for older properties, flats, and homes where traditional windows must be retained.

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Digital Windows (UK) Ltd

4.9

Based on 34 reviews

review us on

Aqz

16:04 12 Jan 26

Fitted Start of may-23. Required a full house change for new double glazing, secondary glazing, 2 back doors and a composite front door arch. Digital windows ltd were amazing from start to finish. They came within 2 weeks to view the property for measurements and give advice on what we can/cannot do. I asked them lots of questions and they were happy to answer. The customer service is excellent. They were clear in the lead time and therefore I had booked them in advance. They put down protection and covering throughout and ensure the place is left tidy. They took good care in ensuring no unnecessary damage was done in the way they took care for taking out the old windows. They mitre cut properly whats needed in regards to trim and take attention to detail for the final quality and finish. They ensured the inside and outside had high quality finish. Going the extra mile in the mortar/cement finish to make it look better. The team are respectful and clearly have great experience and attention to detail for a high quality finish. I am a customer who hawk eyes all the works and notices the smallest of things (like a bubble in silicone), however this company gave me peace of mind. I would 100% go back and recommend to all to go here for windows and doors. Amazing company, great quality finish and great customer service. Great work by Hatim, Mustafa and the team, Thank you!

Paul Clark

17:28 08 Jun 25

We were recommended to Digital Windows and overall we were very pleased to have chosen them. They gave us a prompt, competitive quote for Aluminium windows which took about 7 weeks from paying the deposit to installation. The fitters were very professional and the job was done to a very high standard and I would definitely use them again.

Annand Samy

16:14 23 May 25

We had a break in with an attempted theft. This company responded immediately and fixed the broken widow. Great service. I highly recommend their services.

Jodie Coyle

18:00 17 Apr 25

Very pleased with the product and level of service of the fitters from Digital Windows. The fitters came prepared with dust sheets and cleaned up everything before they left for the day.
Would definitely recommend this company. .

Mike Greatwood

16:42 16 Jan 25

Hatim and the team were responsive, helpful,
communicative and went out of their way to check I was happy with each stage of the installation. The work was of a high standard and the attention to detail was clear to see. Site and doors were left spotless. Would happily recommend…

SURESH KHAKHAR

08:58 10 Dec 24

I ordered my double glazing for the whole house in late October and was told that will be ready to fit in 6-8 weeks and we had a call early December that they will start work and within 5 days work was completed and all rubbish cleared and no bother from the workers at all and also obliged to do bits xtra for us too.Definitely recommended the company as they have been established for many years

Aasya Mughal

20:36 01 Aug 24

Highly impressed with this professional company. From a prompt and skilled initial survey to the high quality finish. The door is of superior quality and the workmanship and installation process was excellent. As a customer, I was kept updated and asked all my preferences. It has now been in place for a few months and looks like it will last for many decades. Thank-you very much to the whole team!

Julia Zemour

05:32 29 Jun 23

Digital Windows have just fitted some black metal bifolding doors in my flat, with a catflap in one of the panels. I am delighted with the results, my doors have transformed my flat and they look stunning. They were so quick to install, and dispose of the old ones. The work is immaculate, and they were tidy too. I highly recommend this company .