Originally Posted by Ironlight
That may all be true but I have not met a casement window I liked. They warp, they get balky to close, etc. I've had new casement windows that failed, mechanism wise, within a year. Our previous house had about 10 of them in an addition on the back. Three of them did not work and they were less than 10 years old. They were Anderson. We did another renovation, adding two high quality tall casements. One of them warped enough within a year that the top latch would not catch without pressure from the outside.
I would love to know in general how much more efficient a casement window is than a doublehung. Is there some generally accepted percentage? If it's not large then I would steer clear of them.
With Anderson, you should have had a lifetime warranty.
Every window design can have problems. My sliders STICK all the time, more so when the humidity changes. My single hung window spring broke so the opening and closing was compromised.
Ideally, fixed windows work the best because there are no moving parts.
From what I have researched, casement provide the best seal for windows that open.