Double hung windows are the type that slide up and down, and are very common in older and newer homes because of their convenience. But few things are more frustrating than a double hung sash that won't stay up because the ropes that hold it are broken, and with careless painting the sashes can easily be painted solidly shut in the jambs. Luckily repairing the windows is easy and requires a minimum of tools. Get ready for some serious paint repair though, because disassembling the jamb parts necessarily chips the paint and exposes nail holes both old and new.