Specialists In Secondary Glazing For Soundproofing IN NORTH LONDON, SUFFOLK, HERTFORDSHIRE AND ESSEX 

Types of Secondary Glazing 

Secondary glazing is an internal window installed alongside your existing one; it does not replace the original window.  
 
In the UK, there are 12 commonly used window styles suitable for most properties.  
 
At NRG Glass, we specialise in select types of secondary glazing for optimum performance: 
Fixed secondary glazing 
Hinged secondary glazing 
Horizontal sliding secondary glazing 
Vertical sliding secondary glazing 
Tilt and turn secondary glazing 
Lift out secondary glazing 
 
For more information or to enquire about our services, get in touch with our team. 

Secondary Glazing Installation in Colchester, Essex 

Secondary glazing is ideal for historic buildings, contemporary homes, flats, and business and industrial lots. Learn more about it below: 
 
Secondary glazing is the installation of an additional layer of glass onto your existing window. Secondary glazing maintains the integral structure of your original window whilst adding the benefits you would find in a modern home, such as condensation prevention and soundproofing
 
 
A professional measures and marks the window, clamps the glazing, and assembles it by snapping the pieces together. The glazing is then drilled and screwed into place, sealed around the edges for insulation, and latches are installed if necessary. Finally, the unit is tested for functionality and cleaned. 
 
 
You generally don’t need planning permission for secondary glazing, as it's a discreet, reversible installation that doesn’t affect the building's exterior. However, if your property is listed, you may need Listed Building Consent. It's best to consult your local planning authority or conservation officer for advice before proceeding, especially if installing in a listed building. 
 
 
Clean secondary glazing every few months with warm soapy water to maintain efficiency. Ensure proper sealing to prevent moisture and mould. Repairs may include replacing glass, hardware, or frames. Keep trickle vents open year-round to improve airflow and prevent condensation. 
 
 
Secondary glazing can generally be repaired, including replacing cracked glass or fixing damaged frames. Replacement is needed only for extensive or severe damage. 
 
 
Secondary glazing usually lasts between 10 to 25 years, depending on factors like usage and environmental conditions. 
 

Window Styles: 

NRG Glass specialise in secondary glazing manufacturing and installation for a range of window styles. 
Want to learn more about the window types? Take a look at our Guide to Window Styles for Secondary Glazing
Horizontal Sliding 
Vertical Sliding 
Lift Out 
Tilt and Turn 
Fixed 
Hinged 

Take a Look at Secondary Glazing Benefits 

Soundproofing 

Condensation 

Listed Buildings 

Areas We Serve 

Hertfordshire 
Suffolk 
Chelmsford 
Halstead 

Our Work 

Enquire With us Today