Karl measured to install new double glazed upvc windows in place of rotten old windows, using the existing window surrounds ie. Minimal disruption. He and his firm booked in and turned up on time and did a very neat job, taking all the old windows with them and leaving the site totally clean. One of the new sash horn covers arrived slightly cracked and Karl returned and replaced it as soon as the part arrived from the makers. I thought the price was very fair and I am going to use the company again for other flats that need refurbish. I was very impressed with the work.