Make a room-by-room list
Record which openings are hard to use, feel drafty, or show signs of moisture. Note when you see the problem and whether it affects more than one opening.
Look at the surrounding finish
Identify trim you want to retain and tell us about exterior work you’re planning at the same time. Coordinating those details can make the scope easier to understand.
Describe the result you want
Think about how each room is used. More daylight, an easier-to-operate sash, and a better entry layout are different priorities. Share those goals before choosing a product.