A double-hung window, also commonly referred to as a double-sash window, is a type of window that has two operable sashes that slide up and down. There are two main operable parts of a double-hung window — the top sash and the bottom sash. They are both able to open to provide ventilation.

Why use double hung windows?

Advantage: Ease of Cleaning

Most contemporary double hung windows are developed for ease of cleaning. Since both sashes tilt in, it means you can clean the outside of the windows from the inside—eliminating the hassle and danger of climbing ladders and scaffolding or using long-handled tools.

Are double hung windows more expensive?

Double-hung windows are more expensive to purchase and install. ... Double-hung window costs can get even higher due to more options for size, energy efficiency, window frame material, and UV protection. These high costs make single-hung windows a better option for those operating within a tighter budget.