Q: I have a problem with an old Pella retractable screen that I need to replace because it's torn and bent. It is for one of four windows in a bay window. Do you have any suggestions? Springdale, Md.

Window screening is there for a purpose. If it gets a snag, a tear, or a hole, it is much less effective at keeping insects and debris out of your home than it is if it is intact. Should your screens ...