Home Sound Dampening: A Renovation Guide for Reducing Noise Levels in Your Home

When renovating, it’s easy to overlook how your new floor plan or finishes affect how sound travels in your home. Sound has a bigger impact on the feeling of your home than you may realize. By the time you notice it, though, it’s often too late to do anything about it.

A quiet home doesn’t just happen by accident. It is designed that way from the beginning. That’s why it’s important to think about how sound will travel in your new space before you design it, not in your final walkthrough.

Working with a design-build company is one of the best ways to ensure your renovation matches your vision without making your space feel loud and echoey. Let’s explore what you need to think about before and during your renovation to make sure your new space feels quiet and comfortable after the work is done.

Why Does Sound Carry More After a Renovation? 

Many renovation designs focus on opening cramped spaces to make them feel more connected. While this works great visually, having fewer walls can allow sound to travel more easily. Even if you’re not tearing down walls, changing the layout of a room can affect how sound moves through the space.

It’s not just the structure or layout of your home. Replacing carpet with hard flooring can make a space feel louder. This is because carpet naturally absorbs sound, while tile and wood amplify it.

Designer Insight: Not all changes during a renovation increase the sound level in your home. Modern appliances and HVAC systems are engineered with sound damping in mind, meaning that they are quieter than old systems. Checking the decibel (dB) rating ensures that your new appliances will run quietly in the background.

Why Sound Dampening Matters for Twin Cities Homes 

No matter where you live, it’s more comfortable to have a quiet home without the constant hum of appliances or echoing voices carrying from another room. Depending on where you live in the Twin Cities, there are several reasons why sound dampening is an important issue for homeowners:

• MSP Airport flight paths: In Apple Valley, Eagan, Burnsville, Rosemount, Lakeville, and surrounding areas, living under the MSP flightpath means you have to deal with more noise on a daily basis, even if your neighborhood is otherwise quiet.
• Older homes: Many homes in the Twin Cities area are older and may not have interior wall insulation that prevents noise. Not only that, but older homes tend to have compartmentalized layouts, which are commonly updated during renovations, potentially making sound carry more.
• Split-level homes: In the Midwest, split-level homes are extremely common. Depending on the specific layout of your home, sound may travel more easily between floors or through open stairwells. On top of that, most split-levels were also built when interior wall insulation was uncommon.

Builder Insight: If your home is directly under an MSP flight path in Richfield, Minneapolis, or Eagan, you may qualify for noise-reducing home modifications from the Metropolitan Airports Commission (MAC) Noise Mitigation Program.

How Does Home Sound Dampening Work?

Removing walls and replacing soft materials with hard finishes doesn’t automatically mean your newly renovated space will be louder. Home sound-damping materials are designed to reduce how much noise transmits through a space. There are a few ways to achieve this in your renovation:

• Adding mass and density, as thick materials prevent more sound from traveling through. In renovations, this usually means using 5/8″ thick drywall or a material called mass-loaded vinyl (MLV), which creates a barrier between floors, ceilings, or walls.
• Decoupling structures, which essentially means building walls so that materials aren’t directly touching each other. The result is that sound vibrations don’t have an easy path to travel through, meaning less noise travels between rooms separated by a shared wall.
• Adding sound-absorbing materials such as dense fiberglass insulation or rockwool between walls or soundproof underlayment materials under flooring.
• Closing gaps with an acoustic sealant, which prevents sound from traveling through cutouts around electrical boxes, utility ductwork, or trim around doors and windows.

How to Handle Sound Dampening Room-By-Room 

The best approach for controlling sound can depend on the room. Here’s what to think about for different spaces in your home:

Bedrooms

Adding rockwool insulation to shared walls can absorb sound rather than just slowing it down. If the bedroom sits above or below a living area, adding a layer of MLV can help block sound even more effectively. Solid core doors can also make a noticeable difference compared to hollow doors used in many homes.

Bathrooms

To prevent noise transmission from plumbing, make sure that water supply and drain lines use pipe wrap insulation. Exhaust fans can also be noisy. Look for a unit that is rated at or below 1.0 sones (a unit of loudness equivalent to 28 dB) and seal the duct connection securely to prevent the hum of the fan from carrying to other rooms.

Home Office

Sound-dampening for a home office follows a similar approach to bedroom insulation. Rockwool insulation is a starting point, but adding a second layer of drywall with a dampening compound like Green Glue will create an even quieter space for working at home.

Living and Dining Areas

Open concept spaces tend to be louder because there’s nothing there to absorb sound. If you are replacing the floor, using an acoustic underlayment can help hard floors transmit less noise. If the space has high ceilings, adding acoustic insulation in the ceiling cavity can help prevent echoes.

Home Theaters

For a home theater, the goal is to contain sound within the room. Decoupling within the walls is one of the best approaches to prevent sound vibration from traveling. MLV material and rockwool insulation are typically added in the walls and ceiling cavities as well. For a final step, adding acoustic panels to the interior walls can manage echoes and low-frequency bass.

Basements

Basements often have your HVAC system, water heater, and mechanical systems, which all tend to generate consistent low-frequency noise. Using insulation wrap around pipes and ducts can help reduce vibrations that travel through these systems. Adding basement insulation between the joists can also significantly reduce how much noise reaches the main level.

When to Address Sound Dampening in Your Renovation 

Choosing the right sound-dampening insulation for homes is important, but what matters most is timing. The best time to consider noise prevention in your home is during the planning process.

Sound insulation is usually added during the framing, drywalling, and flooring stages of a project. But it’s important to keep in mind that adding sound-damping materials after work has begun can create several issues.

• Sound-dampening materials can add thickness. If your project was designed without taking this into consideration, it can make the renovation more complicated to add insulation later.
• Adding sound insulation mid-project will affect your renovation budget, especially if designs need to be reworked to accommodate the material.

This is one of the best benefits of working with a design-build firm. At James Barton Design-Build, we work with you to create a design that includes all of your must-haves from the beginning. With design and construction planned with the same team, there’s no gap between what our designers spec into your project and what the builder actually does.

If you’re planning a renovation and want to get it right the first time, our team would love to talk through your project. Schedule a consultation to get started!