How to Soundproof a Room with Drywall

Installation Techniques That Make a Difference

The way you install drywall plays a big role in its effectiveness. Even the best materials won’t work if they’re not installed correctly. Pay attention to corners, edges, and joints, as these areas are most prone to sound leaks. Taking the time to seal and secure them will make a noticeable difference.

1. Double Layering: Add a second layer of drywall with a sound-dampening adhesive, like Green Glue, between the layers of drywall. This creates a barrier that absorbs external sound vibrations.
2. Decoupling: Use resilient channels or sound isolation clips to separate the drywall from the studs. This reduces sound transference.
3. Sealing Gaps: Any gap, no matter how small, can let sound leakage through. Use acoustic caulk to seal edges, electrical outlets, and seams.
4. Adding Mass: More mass equals a more soundproof wall. Layers of drywall or using dense materials increases the barrier.

How to Improve Soundproofing with Insulation and Barriers

Drywall does a lot on its own, but pairing it with other materials can improve results. Insulation and sound barriers are excellent additions for stopping noise in its tracks.

Here’s how to enhance your drywall project:

• Soundproof Insulation: Use sound insulation, like mineral wool or fiberglass, in the wall cavities. It absorbs sound and prevents it from traveling through the structure.
• Mass Loaded Vinyl (MLV): Add MLV sheets behind the drywall for an extra layer of soundproofing.
• Acoustic Foam Panels: Install soundproofing panels over drywall for additional noise absorption, especially if echoes are an issue.
• Soundproof Curtains, Carpet, and Rugs: While not part of the drywall, soft material like heavy curtains in the room can complement its soundproofing by absorbing airborne noise.

FAQ

How much does it cost to soundproof a room with drywall?

The cost varies depending on the materials and methods used. Basic drywall installation ranges from $1-$2 per square foot. Adding soundproof drywall or accessories like Green Glue and resilient channels can increase the cost to $3-$5 per square foot. Full-scale soundproofing, including insulation and barriers, may run $1,000-$2,000 for an average-sized room.

Can I soundproof an existing wall without tearing it down?

Yes, you can improve soundproofing on an existing wall. Attach an additional layer of soundproof drywall with Green Glue, or add mass-loaded vinyl over the surface. Acoustic panels can also be mounted directly onto the wall for additional noise reduction without major renovations.