To prevent bowing or sagging, match the rod's diameter to the weight of your curtains: Types of Curtain Rods - The Home Depot
Designed for layering, these feature two parallel rods—a larger front rod for decorative panels and a thinner back rod for sheers. curtain rod
These use spring pressure to stay inside a window frame without screws. They are best for renters and lightweight curtains but may sag under heavy loads. To prevent bowing or sagging, match the rod's