Do you not realize how long is 15 years? Or how long is 25-30?
The windows in our house, Hudson Valley(NY), are at least 30 years(all mechanical parts are labelled as "pre-1994") - they are not showing much wear... considering that we get -20C to +30C swings every year.
The windows in our house, Hudson Valley(NY), are at least 30 years(all mechanical parts are labelled as "pre-1994") - they are not showing much wear... considering that we get -20C to +30C swings every year.