I invited NRG Glass and other companies to come and quote on secondary glazing for a period property, which had single glazed sash windows. The aim was for insulation and noise reduction. NRG was the first company to respond and was able to make an appointment quickly to assess the issue. They presented a number of solutions and were very open and up front about the pro's and con's of each. After a while, they presented a multi-solution proposal, which was within my expected budget, and they were able to come and fit within 4 weeks. The fitting was quick and professional, and sympathetic to the style of the windows. Rob and Jeff were friendly throughout. I can strongly recommend NRG for secondary glazing, and would definitely use them again.
Guy Clark, Wethersfield