I am writing this to advise others to NEVER PURCHASE GENTEK WINDOWS.!! In the summer of 2016, we purchased 22 windows from Tip Top Exteriors, Calgary (apparently no longer in business)! The owner/operator gave us an estimate and promised these windows would perform as good as the All Weather Windows we had installed several years ago. We wanted the best Triple Glazed windows. The Gentek windows are advertised as being "Energy Star" Most Efficient for 4 yrs in a row. That is completely FALSE! We had questioned the seller on the thickness of the windows so that there would be adequate space for the "gas" between the 3 panes. He LIED to us! He said they would have an overall thickness of 1-1/8th which was already less than the 1-1/4" of All Weather Windows. But we decided to go ahead with them. Turns out the thickness is only 7/8". Basically they squeeze the 3d pane in the space between the double pane, leaving very little space for the "gas". The windows looked fine but once the weather cooled off in October, we noticed the windows starting to get condensation and water ran off them.!! We complained in person and in writing to him and wrote letters to the Calgary office, branch manager, but with no satisfaction received. They just say that the humidity in your home is too high. If that is the case, why do the other All Weather Windows, not show condensation? Also the Gentek windows are drafty/cool in winter! In short, the Triple Glass Gentek windows are a complete waste of money and have caused us a great deal of stress, feeling RIPPED OFF!! RON AND EVA SWANSON read more