High-Quality, Effective Secondary Glazing For Listed Buildings 

At NRG Glass, we take great pride in our experience in caring for heritage and listed buildings including churches, museums and listed homes. We understand that preserving the unique character and historical significance of these properties is necessary. 
 
For Heritage and Listed Buildings such as those from the Edwardian and Victorian eras, secondary glazing is an excellent alternative to window replacement. It’s inspiring how many of these original windows have stood the test of time. With proper maintenance, they can continue to serve for many more years. 
 
Our secondary glazing for listed buildings provides a discreet and effective way to enhance insulation, reduce noise and improve energy efficiency. 
 
With years of experience working on landmark buildings, we are proud to help maintain and protect the beauty of historical structures for generations to come. 

Conservation Secondary Glazing 

Conservation Areas are described as 'areas of special architectural or historic interest, the character or appearance of which it is desirable to preserve or enhance'. They are covered by the Planning (Listed Buildings and Conservation Areas) Act 1990.  
 
Conservation area consent is required for demolition or any work that affects character of the area and advice should be obtained from a Conservation Officer. The installation of secondary glazing should not require consent unless the building is listed in which case Listed Building Consent should be sought. 
Take a look at our services today. We investigate secondary glazing insulation effect, secondary glazing noise reduction, secondary glazing condensation and many more! 

Our Work 

Take a Look at our Other Services 

Insulation 

Soundproofing 

Condensation 

Areas We Serve 

Hertfordshire 
Suffolk 
Chelmsford 
Halstead 
Listed buildings are protected by the council and are categorised by three grades. These properties are often built before the 1700s and showcase their original architecture. 
Planning permission for double glazing is typically required if you live in a listed building or conservation area, we recommend confirming with your local council
Older buildings are prone to mould, damp and mildew because of condensation. This is caused by gaps in the windows and doors, so installing secondary glazing helps to eradicate this. 
Double glazing is usually not allowed in Grade II listed buildings. However, secondary glazing can be a suitable alternative, offering insulation benefits without altering the property's exterior. Always check with your local authority before making any changes. 
Listed building consent is required for any work which will affect the character of a listed property. To have work carried out without consent is a criminal offence. If you are the owner of a listed building, you must ensure you follow the regulations and guidelines that are put in place by the planning authorities. 
 

Our Testimonials 

Very neat system, hardly noticeable in our old listed cottage. 
 
M Rose, Suffolk 
Very Knowledgeable, Fitting An Old House With Quirky Windows. Very Prompt With Their Estimate Over Email, Arrived On Time, Fitted In The Time Stated And Tidied Up After Themselves. 
 
Miss Pat Reynolds 
Very Happy With The Work, Really Great Lads, Cheapest Company Around. Would Definitely Recommend Them. 
 
Kieran M 

Enquire With us Today