He also pointed out that single-hung windows are more energy-efficient than double-hung because there are fewer moving parts. From the glazing (glass) to the stiles and rails that make up the sash ...

Single-hung windows are typically less expensive than double-hung but are more efficient. That’s because with fewer moving parts — and less functionality — they’re better for getting a ...

First, get the repair parts. (Note: The parts and the repair techniques are different for wood windows and all-vinyl windows.) Double-hung wood window hardware may vary by brand. To make sure you get ...