DONT BUY THESE WINDOWS, THE PRODUCT IS AWFUL AND THE CUSTOMER SERVICE EVEN WORSE!! We had 11 large custom replacement windows installed a year ago. In April one of the windows formed a small crack that quickly went almost right across the window. I called the installer who told me that this sometimes happend and that is why there is a 2 year warranty, I was told to tape the window so it wouldnt crack further and that they would start the warranty claim. About a month later I received a call that the replacement was ready to install in about a week and that they would be in touch to arrange a time. At that point it all went really bad. No one ever called to arrange but I made over a dozen calls asking them to commit to a date. I always got the same answer, the installer will call you as they book their own appointments and no you can not have his number. He never called me. I finally called and insisted to speak with his manager and after nearly 4 months I finally had a install date. I made arrangements for someone to be there to let him in and "surprise" they never showed up, when I called they said my window wasn't scheduled yet for install. Needless to say I was very frustrated. They ended up rebooking us a week later. Now we have second window that the seal has gone on. I have now left 2 messages that I need to make a claim but again no one will return my call and I cant speak to anyone but the receptionist. I am digging in for another battle, ARGH!!!