Classic charm with 21st century performance

Historic England recommends the installation of secondary glazing as there is no loss of historic fabric and in most cases, installation is easily reversible.

Get a free quote

 Once you've completed the enquiry form, we'll be in touch to find out your exact needs and requirements.

 We'll find you the perfect Granada-approved installer, provided you don't want to manage the install yourself.

 Your Granada-approved installer will contact you directly to discuss your needs and arrange a home survey if required.

 Our industry-leadings products will ensure you have a quieter, warmer and more secure home.

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Handcrafted, slimline and discreet

Granada Secondary Glazing has supported renovations to some of the UK’s most iconic, historic buildings, for commercial and residential property owners. Much of the Granada range has been specifically designed for listed building windows, conservation areas and heritage properties.

Many homeowners enjoy the visual appearance and the character offered by traditional windows but are, often unhappy with the acoustic and thermal performance. A property which is Grade I, Grade II Listed or within a conservation area are not permitted to change and upgrade their glazing package. Secondary glazing which can be installed within a listed property and conservation areas resulting in a glazing package suitable for the 21st Century.

Benefits of secondary glazing

  • Reduce noise levels by up to 80%
  • Easy to install, either DIY or by tradesmen
  • Reduce heat loss through existing window up to 65%
  • 10% more heat efficient than double glazing
  • Can be installed within conservation areas
  • Available in over 200 RAL colours
  • Arched frames
  • Delivery 10 days of order
  • 5 year warranty (FENSA warranty of installers)

Reduce noise levels up to 80%

Secondary glazing’s secret is a sound blocking air cavity that is created which drastically reduces noise, teamed with acoustic glass Granada can make a diesel bus sound like an electric car. To achieve the best acoustic performance we advise, an air cavity of up to 200mm glass to glass and the specification of an acoustic glass.

Increase thermal performance up to 65%

Draughty windows can make a room feel uncomfortable. Secondary glazing acts as a second barrier to the elements often increasing thermal performance. Not only will you have a naturally warmer home but you will even develop a more economical home, by spending less on your heating bills and keeping warmth locked in. We advise the installation of low-e glass which is designed to reflect heat back into your home and an air cavity no more than 80mm glass to glass.

Our homeowner products

Available in 200 RAL colours and suitable for most windows our homeowner products include horizontal and vertical sliders, and other bespoke secondary glazing windows. Granada supply the whole of the UK with a 10 working day lead time on all standard products.

So many benefits


Granada secondary glazing will complement your home, providing maximum benefits and years of trouble-free service, specified and designed for thermal and sound insulation.

Retain character

As the Granada range is slim line and discreet it has been specifically designed for listed building windows, conservation areas and heritage properties.

Increased security

Secondary windows offer an affordable, discreet, highly effective solution to enhancing building security. No external access is required, ideal for multi-storey buildings.

Start your secondary glazing journey today...

Get a free quote