Sound doesn’t only bounce off walls, it can be reflected by hard floors, too. If your room has a hard-surface floor—wood, tile, or laminate—the simplest solution is to lay down an area rug ...

Now it's time to paint, and technique is important here. "Generally roll top to bottom from one side of the wall to the other end," says painter Alex Davison. "I know you'll want to finish quickly ...

Soundproof paint is also available, though pros say it’s less effective and works only on higher frequencies. However, it can be effective when combined with other methods.

The cost to paint interior walls alone is $1.50 to $3 per square foot (accent walls or rooms with high ceilings may up that rate), but you’ll also need to budget for ceiling and trim costs.

A universal tin that can be used on exterior as well as interior surfaces, Drybase's paint comes in 1L and 5L sizes. Use a roller, brush or spray to apply this two coat damp proof coating.