Durabuilt Windows & Doors Inc replaced all our windows and patio doors fifteen years ago (Sept 2006). Over the past ten years we have had to replace the sealed units in eleven of our twelve windows (for a total of thirteen out of sixteen) and one patio door. My concern is, with regard to their product, the lack of quality control. One’s windows should last more than five, or ten years, in fact, I would think over fifteen years. Although their fifteen-year warranty covered some of the replacement costs; I had to cover the labour costs – more than $3500 over that period. Although I am not impressed with their product, i.e., sealed units, I was impressed with Durabuilt’s Service and Installation personnel – they are and were professional and courteous in all respects.