Spent $36000 to replace my old(46 year old) inefficient windows in 2002. I made the mistake of buying Marvin windows. 14 years later the bottoms of all of the casement windows are completely rotten out. The horizonal sliders are fine. I got a big FU from Marvin and no help on new windows. Over $2000 per window to replace. I will not make the same mistake twice. Good bye Marvin...hello Pella!