I first used Window Maintenance to repair existing double glazing: handles, replace windows that had blown, put in vents to existing windows and a chain lock on a front door. They were excellent and I then used them to replace French doors and doors and windows to the garage. The company came when they said they would, did the jobs they said they would do (and which no one else could be bothered to do including finding a replacement to my odd-sized mailbox) at a fair price. Although I had to call them back to make some adjustments, they came promptly (the next day) and did them to my complete satisfaction. I would defintely use them again