I deeply regret choosing Everest
I chosen Everest for their reputation, despite having multiple local installers. I had installed a window by them. While initially, I was quoted £3,000, the saleman drop the price to £1,800, promising an A rated window to their best standards. He told me that all their windows have Argon between the glass pane, and all the papers will be with me after the installation. Installation come 7 weeks later, and soon after I realised that my 15 years old window was performing better than their A rated double glazing. The room is significantly colder and I can hear people speaking on the street. I asked for the technical sheet to see the U-value and energy label, and 1 month later I still do not have them. I really doubt that the window is A rated and has Argon gas inside. I paid £1,800 for the hope of the best window, but what I got is just a bad joke. I deeply regret chosing them and I would advice everyone to ask written confirmation of the technical specs before hand. In their contract is not written, so be aware what you're buying. You buy trust and get a product worst than from your local companies.. it's excruciating paintful.