Secondary Glazing

Secondary glazing is an effective way to improve the temperature of your home, as well as reducing sound pollution and enhancing the security of your property. It’s an affordable alternative to traditional double glazing that provides just as many great benefits, and with styles of installation that are sympathetic to period properties and historic homes. At Cut My Plastic, we can cut acrylic sheeting to any size or shape for your secondary glazing needs, to ensure that the fit is accurate.

What is secondary glazing?


Secondary glazing works by fitting a discreet internal window into an existing single or double-glazed window to make it more insulating and efficient. Because of the optical clarity that acrylic provides, there’s no discernible difference between the visibility or light transmission of your single glazed windows and the results of secondary glazing. It’s often a preferable alternative to double glazing, particularly for heritage properties, as it doesn’t detract from the external character and look of the windows but gives all of the benefits. Acrylic is easy to fit, due to its lightweight qualities, and can be removed easily too – so in the summer, you can take your secondary glazing panes out if you wish to and fit them again in the winter.

What are the benefits of secondary glazing?


When you install secondary glazing into your property, you achieve the same insulating benefits of double glazing, such as lower energy bills and improved heat transfer. Secondary glazing can reduce heat loss via windows by around 65% which is 10% more than double glazing provides. This means your home will stay warm in the winter and cool in the summer. Another benefit is that it also insulates against sound and enhances the security of the property. Secondary glazing also provides better value than double glazing, as it’s more cost effective, can be removed easily if need be with certain styles and it’s subtle, so historic homes can retain their character while still reaping the rewards of a warmer and more soundproof home.

Secondary glazing offers incredibly effective sound insulation, more so than traditional double glazing, and can help to reduce noise levels by as much as 80%. When using secondary glazing for this purpose, we suggest choosing a different glass thickness to what is in place already, as this will decrease sound reverberation. It’s an affordable and highly effective method for enhancing the security of the building as well. It can even be fitted easily to wooden window frames. If you live on a busy road with lots of traffic noise, installing acrylic secondary glazing panels to your windows can help reduce these noises significantly and will act as an effective sound barrier. Acrylic is far more secure and impact resistant than glass, offering a second barrier of protection from the inside that will deter thieves and protect those inside from outside hazards. And because no external access is required, it’s ideal for multi-storey buildings.


If you need any advice or have a question regarding secondary glazing for your home, give our friendly team a call and we’ll be happy to talk you through the best options for your home.