Our contractor installed weather shield vinyl windows throughout our house in a 2005 remodel. Most are typical/vertical sliding windows. Master bath has casement windows with a crank to open them. We had significant problems with both. The casement windows will not latch/lock. They're barely used at all. The sliders in our bedroom broke. The the valence wheels somehow broke thru the side of the window. We submitted a warranty claim. We are within the 20 year warranty period. Weather shield denied the claim saying our windows were "misused and abused". Needless to say we were shocked. We have central air so these windows are used infrequently, let alone abused. They also wouldn't explain their decision/process or allow me to speak to a superior. I can only conclude I will never use weather shield again.