Single-hung windows are more energy-efficient but offer less ventilation. Double-hung windows are costlier but are more functional and easy to maintain. Both types offer plentiful frame materials ...

Double-hung windows are made with two movable sashes that move independently. Double-hung windows offer superior airflow, easy cleaning and many frame options. Compared to single-hung windows ...

If so, search online or look in the Yellow Pages under “Windows ... (Note: The parts and the repair techniques are different for wood windows and all-vinyl windows.) Double-hung wood window hardware ...