Homeowners can try various solutions to prevent noise from escaping under their doors. Rolling up a towel and jamming it into the crack beneath the door is a common DIY method. While this under-door noise blocker may have some effect, it’s far from ideal. A rolled-up towel is better at absorbing sound than blocking it, so noise will still escape. Plus, you’ll need to move and replace the towel each time you open the door.
Instead of DIY methods, use a dependable product like a rubber door sweep. Door sweeps attach to the inside of the door, closing the gap between the door and the floor. As a dense but flexible material, the door sweep will stop sound transfer but move with the door as it opens and closes. A door sweep is the most convenient and effective thing to put under your door for noise reduction.