Secondary glazing for sash windows and casement windows

We know that sometimes double glazing isn’t the right solution for upgrading your timber sash or casement windows. Our secondary glazing is designed to seamlessly blend into the style of your property.

Secondary Glazing for Sash Windows

Experts in installing secondary glazing in Brighton, Hove & Sussex

The reasons for this could include;  that you live in a listed building or your property is subject to the regulations of a conservation area. In these cases, secondary glazing is an ideal alternative and we have years of expertise crafting and installing it in homes from the Victorian, Edwardian and Georgian era and earlier!

What is secondary glazing?

Secondary glazing is a fully independent internal window, fitted on the room side of an existing window. It’s usually constructed with a lightweight and thin aluminium frame, so it won’t block the sunlight, look ugly or obstruct your view. There are many styles to choose from too, and we can help select with you, the most suitable option for your style or property and how you’d like to access or open the windows.

The main options are:

  1. Lift out units – used where the primary window is fixed or where you rarely require access to open the window for ventilation needs.
  2. Hinged units – the are generally used with casement / hinged primary windows and open the same way to match the original window.
  3. Vertical sliders – these are often used on vertical sliding sashes with the meeting rails aligning with the primary window meeting rail.
  4. Horizontal sliders – a bit of a hybrid, these are normally used in conjunction with sash or casement windows where full access is required and where there is sufficient space internally to open the casement secondary glazing.

We recommend having your primary windows inspected at the same time as a secondary glazing survey, as if can often be beneficial to have them draught proofed at the same time.

Secondary glazing styles and finishes

Your home will be warm and quiet with our secondary glazing. This level of subtlety allows historic homes to retain their character whilst taking advantage of more recent breakthroughs in additional glazing. We offer a wide variety of styles and finishes that you can install at your property, ensuring that the finish you choose blends perfectly with the existing design, style and motif that are already in place.

secondary glazing installer in brighton, colours and styles

Cut down noise from busy roads

With our roads becoming ever busier, for many homeowners, traffic noise is a key concern. In these instances, secondary glazing with thicker glass can make the world of difference. Well-fitted secondary glazing provides outstanding noise reduction – outperforming double glazing – and our acoustic glass provides maximum sound insulation. The minimum gap between the primary window glazing and the secondary glazing must be 100m – and to achieve a higher acoustic performance, a gap around 150mm is desirable. If the reveal is insufficient to achieve the minimum 100mm gap, the window will require boxing out to the required depth. Our Surveyors will advise on this and any other issues at the time of the survey.

Make your home feel warmer

A draughty home can be uncomfortable and leave you with expensive energy bills. By creating a second barrier to the elements, secondary glazing is an ideal way to reduce wasteful thermal heat loss. Our bespoke solutions create an insulating layer of air – this is important to the retention of energy as the fitment and seals.

Our installations can exceed Building Regulations’ requirements, offering significant cost savings in the process. They are also sympathetic to traditional buildings, maintaining their appearance and integrity.

Relax in a more secure home

Windows are often seen as a weak point in building security. At Top Notch Sash, our secondary glazing offers an affordable, discreet and highly effective solution to help counter this problem.

Can secondary glazing be installed in my listed building?

If your home is listed, in a conservation area or has protected status then secondary glazing is the preferred method of upgrading your home’s energy efficiency and sound insulation. It is advised that before undertaking any work you contact your local conservation officer to check what is and is not allowed before starting any renovation. We have a vast wealth of experience and can help you get permission for works and navigate the process.

Read more from Historic England

Get your free quotation today

Get in touch, we won’t bite. But we do have extensive experience working on all types of projects, for private and commercial clients.

Brighton – 01273 258 226
Worthing – 01903 444 737

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Brighton – 01273 258 226
Worthing – 01903 444 737
Mobile – 07787 518 229

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Monday to Friday
09:00 – 17:00