I have used Kettell Windows previously and didn't hesitate to return.Their prices are competitive and all their windows are excellent quality. As a Landlord reliability and the utmost professionalism when dealing with a tenanted property are as important as quality and price. Kettell staff arrive when they say they will and are always hardworking, friendly and professional. They leave the property spotless and clean the windows inside and out. They even screwed in the number for me which I had purchased for the new door. I would recommend this company unreservedly.