NRG Glass
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NRG Glass
We are a family business that specialise in the manufacturing and installing of secondary glazing. All the windows are manufactured here in our own workshop, which gives us total control over the quality from manufacturing to installation. If you are unsure what secondary glazing is? It's quite simply the addition of a slim secondary window that fits inside the existing window, which helps in soundproofing and insulating your property.

All of our secondary glazing is made to measure to match the primary window exactly, including powder coating the frames any colour to seamlessly fit into your home to retain the character of your property. We can also glaze the secondary glazing with 6.4mm laminated glass, this will block 99% of UV rays coming into your home, which will stop your furniture fading blinds going brittle etc.
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NRG GLASS are a family run business manufacturing and installing bespoke secondary glazing. Serving Essex, Suffolk, Hertfordshire and London. NRG GLASS is owned and run by father and son Geoff and Rob Noble. Geoff has 40 years experience of aluminium fabrication and Rob has 20 years experience of installing secondary glazing.
Part L of the building regulations for replacement double glazed windows set a U value of 2.00. Standard 4mm glass secondary glazing over an average single glazed window achieves a U value of 2.5. Secondary glazing can be fitted to improve thermal insulation as well as eliminating draughts. Secondary glazing can improve the thermal insulation of a window by up to 70%.
The cavity or gap between an existing primary window and the secondary unit can make a significant difference to the level of noise insulation. Unlike sealed units where the two pieces of glass are rigidly coupled together, the primary and secondary windows act as independent barriers to the transmission of noise.
Planning Policy Guidance PPG15 recognises that the best way to secure historic buildings is to keep them in active usage and this may involve some adaptation to meet current needs. The rich tapestry of window designs are an important part of the character of a building and must be retained but single glazed frames are a major source of heat loss, provide little protection against noise and offer minimal resistance to burglary.
NRG Glass have the facility to manufacture our aluminium products in any RAL colour, to your individual colour requirements. We use industry standard RAL colours, which are a range of over 200 colours available in gloss, semi-gloss and matt finishes, from approved coatings specialists. The Polyester powdercoat paint is baked onto the aluminium in order to withstand the rigors of all weather conditions and modern living in the UK.
Reviews (4)
Nabil Elghorri
Nabil Elghorri
Jun 10, 2020
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From initial enquiry, right up to installation 10/10. A fantastic company to work with, everything from the product that was specified for our needs, quality workmanship, the customer service and communication was spot on. Thank you for such a great service.
Essex Boys
Essex Boys
Oct 25, 2019
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Had secondary glazing fitted for noise reduction and to stop draught windows and my wife and I are very pleased with the quality and look of the glazing ..brilliant..and the whole process from ordering to the finish.thanks guys ..brilliant job..
Maria Palmieri
Maria Palmieri
Oct 31, 2015
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We absolutely loved the secondary glazing service of NRG Glass as it considerably reduce the noise at the front of our house and is discreetly fitted inside of the existing windows. Now we can enjoy peaceful moments in our house throughout the day and night. We are very pleased with the quality of the product and fitting. They truly deserved a big applaud.
John Burstal
John Burstal
May 07, 2015
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Besides being superbly impressed with the quality of secondary glazing by NRG Glass, we are bowled over with their utter professionalism, punctuality and polite behavior. They listened to our requirements carefully and provided us with the best option of glass. We will be very happy passing their name to my friends and colleagues.