Soundproofing windows without replacing them can be achieved by using window inserts, adding heavy curtains, or applying acoustic caulk to seal gaps. These methods help reduce noise infiltration and enhance the comfort of your home without the need for a full window replacement, making it a cost-effective solution for sound insulation.

For better sound insulation without replacing windows, you can install soundproof window inserts or hang thick, noise-dampening curtains. Acoustic caulking around the window frame can seal off small gaps that allow sound to travel indoors. These solutions can effectively reduce outside noise and are more affordable than replacing the entire window, providing a quieter indoor environment without extensive renovations.