We’ve launched our Summer Sale! A fantastic range of savings are available across our Outdoor Living range

10% off all veranda orders placed before 22nd August 2022

and 10% off the LED and Spotlights upgrade options

10% off all bioclimatic pergolas (with motorised roof and lighting) orders placed before 22nd August 2022

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Secondary Glazing

To improve performance of existing sash windows, secondary glazing can be installed discreetly to the inside of frames, providing an extra layer of insulation that keeps your home warmer in winter and cooler in summer.

In Grade I and Grade II Listed buildings and conservation areas where changes and upgrades to windows are not possible, our bespoke secondary glazing (including slim double glazed units) can reduce heat loss by up to 65% and noise levels by up to 80%. Adding additional windows also slashes a building’s CO2 emissions and enhances security by providing a barrier against unwelcome guests. All whilst preserving the character and charm of your property.

Our secondary glazing units are custom manufactured to your specifications for easy installation and available in the following styles:

  • Vertical sliders — for use with traditional box sash windows
  • Horizontal sliders — where access to the primary window is essential
  • Hinged units — providing an unobstructed view on doors and large windows
  • Fixed panel — for areas with a minimal fixing area
  • Lift out — a cost-effective option when limited access is required
  • Arched units — to match the contours of arched primary windows

All units are designed for easy cleaning and come finished in your choice of over 200 RAL colours. 

Request our secondary glazing brochure.


Request a Quote

We are trusted by homeowners for creating beautiful, bespoke timber windows, doors and conservatories.

We will call you to discuss your enquiry, could you please let us know what would be a suitable time for us to contact you?

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Need some advice?

You can reach a member of the team by calling 01642 456167 or emailing info@erwltd.co.uk and we will get back in touch.

Alternatively, you may wish to browse our range of brochures and guides.

Contact Us Request our Brochure

Brochure Download