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Soundproofing a room is done to either keep noise in or keep it out. Bedrooms, home offices, or entire homes in busy neighborhoods benefit from soundproofing for improved quality of life. On the other hand, home gyms, studios, and theaters add soundproofing to keep noise in the space, away from neighbors and family.

Walls cost between $100 and $350 to soundproof, depending on how much noise you need to keep out. To soundproof an existing wall without major construction, you have the option of adding rock wool or mineral wool, mass-loaded vinyl sheets, soundproof paint, acoustic panels or tiles, or sound-dampening curtains.

Soundproof design takes each area of the room into account. Sound comes in through doors, windows, floors, walls, and ceilings, but not all need protection for each project. Always begin by determining what level of soundproofing you need for your situation.

Smaller projects may only require thicker carpeting, sound-dampening curtains, and soundproof paint. Add layers of mass-loaded vinyl, panels, tiles, or wool to go a step further. In extreme cases, you can also opt for soundproof windows, doors, and additional insulation in the walls, ceiling, and floor.