Replaced all our windows in our home 3 years ago. The windows have been leaking air and freezing each winter. They came out about 6 different times, they would try this then try that, nothing worked. We had a manufacturer rep come out, he said the ice is excessive and this should not be happening. He received many picture's to take with him. We have heard nothing from him. I have sent 2 or 3 e-mails to him with no response. They blame it on condensation saying our humidity is too high. I don't think 20-29% is too high. There is nothing they will do. We are out $17,000.