Secondary glazing

Discreet internal windows that dramatically reduce noise levels & heat loss.

The benefits of our secondary glazing

  • Heat saving

    Reduce heat loss by around 65%.

  • Noise reduction

    Reduce external noise by up to 80%.

  • Less disruption

    Installed quicker than new window frames.

Retain the character and charm of your property with the precision installation of a slimline glazed unit that sits neatly either on the frame of your existing window or within the window reveal.

Listed buildings & Conservation areas

Secondary glazing is an ideal product for people who live in properties where uPVC windows might not be the solution for them.

It is a particularly useful product for home owners living in a listed building or conservation area where there are strict limits on the changes that can be made to a property.

Exterior of a heritage property
Stylish office library
Large living room with bespoke secondary glazing

Secondary glazing prices

Our high quality, precision engineered secondary glazing starts at £550 per window.
See how much it will cost to add secondary glazing to your home.

Get your free quote

Closeup of secondary glazing window

What is secondary glazing?

Our secondary glazing is an inconspicuous aluminium window fitted on the inside of your existing window.

The slim aluminium frame is fixed to your existing window or into the window reveal.

The reveal fix creates a 100mm-200mm gap to provide optimum insulation and soundproofing.

Secondary glazing can help reduce your energy costs

Our secondary glazing substantially improves the thermal insulation of existing single-glazed windows, reducing heat loss through the window by around 65% - approximately 10% more than double glazing achieves.

This means your home will stay warmer in the winter and cooler in the summer - saving money.

We have a number of different glazing options available, allowing us (if required) to exceed Building Regulations’ Requirements. We can accommodate up to 10.8mm in all our product types and up to 28mm in our hinged units.

We can also tailor the glazing for security, tinting and solar protection.

A living room with leather chairs
Bedroom windows with secondary glazing

Reduce external noise by up to 80%

The 100mm-200mm gap between your existing window and the secondary glazing creates the most effective means of removing external noise from a room, even more so than the most high-spec double glazing products.

Our secondary glazing can reduce external noise by up to 80% (which is the equivalent of 54 dB).

Discreet, stylish windows

Our made to measure ultra slim aluminium frames are specifically designed to complement traditional and contemporary homes.

  • Secondary glazing in a house on Lyndhurst Road, Sheffield

    Retain character

    Keep your existing windows & property’s original aesthetics.

  • Winter view through secondary glazing

    Unrestricted views

    Slimline aluminium frames have minimal sightlines.

  • Dark framed secondary glazing

    Match your interior

    Range of design and colouring options to suit your interior décor.

Match your existing window frames and home décor

Our range of secondary glazing products have been made to match virtually every style of primary window. The options are endless, and we’re even able to offer multiple product types within the same order according to the needs of your property.

Choose from:

  • Horizontal sliders
  • Vertical sliders
  • Hinged casement
  • Lift out windows
  • Fixed windows
  • Bespoke designs, including arched windows

Aluminium frames are painted white as standard, though you can select from over 200 RAL colour options – to mirror the look and feel of your home.

Our secondary glazing brochure

Dark secondary glazing frames and white frames in a kitchen
White commercial building with secondary glazing on large windows

Robust and reliable

All our products are manufactured in Yorkshire on calibrated CNC machinery and are tested for quality by our industry-leading manufacturing partner, Granada Secondary Glazing

  • High grade, durable aluminium
  • 10 year warranty on frames
  • Crafted and engineered in Sheffield

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