Welcome to Supreme Installations. Supreme Is Different We are quite unique in the double-glazing industry, we supply and install the best quality products and some of our installers have been fitting for Supreme for 20+ years, with an unblemished trading history since 1986 when it was first formed. Buying double glazing is a big investment. There are still a lot of hard sell companies in the industry, no price is given on the initial visit, so you do not have the pressure to sign on the night, you make your decision in your own time. We give a choice. On our first visit we would go through the details of the product you require, take measurements, this very often only takes about 20 to 30 minutes or as long as you need, then we will prepare a detailed quotation at our office, which we can e-mail, post or hand deliver to you. You can also. Call into our showroom or e-mail photos with the sizes, style/s and colour etc of the product you would like and we will quote on the information you have given. Our Showroom. We have a wide range of windows and doors in our showroom we believe it is important to see and go through the product and make the right choice before you buy.