Don’t deal with the company www.quotatis.co.uk. I have contacted them and asked to sell and install windows. The lead was completely useless, because they too my order, but after several days they warned me that the order wasn’t full. They didn’t have all windows and needed to contact the manufacturer. Ok, the process took about 2 weeks. Now they have my windows, but they again have found some problem and couldn’t deliver the order. Their staff is joke.