How to Soundproof a Wall between Apartments

Living in an apartment can be a delightful experience, but sometimes, the thin walls can leave us longing for a little more privacy and tranquility. Whether it’s the loud music from the neighbor’s party or the constant noise of footsteps echoing through the walls, the need to soundproof a wall between apartments becomes crucial. If you’re tired of being disturbed by the unwanted sounds seeping through, you’ve come to the right place.

To soundproof a wall between apartments, start by installing a layer of mass-loaded vinyl followed by a thick layer of acoustic foam. Seal any gaps with acoustic caulk and hang heavy curtains or tapestries. Finally, add bookshelves filled with books to further absorb sound vibrations.

In this blog, we will explore effective strategies and practical tips on how to soundproof that wall and create a peaceful sanctuary within your living space.

Understanding the Importance of Soundproofing

Understanding the Importance of Soundproofing

Below is the importance of soundproofing and provide you with valuable information on how to soundproof a wall between apartments.

The impact of noise disturbances in apartment living

Living in close proximity to others means that noise disturbances are inevitable. Whether it’s the sound of footsteps, loud conversations, music, or even the buzzing of appliances, these noises can penetrate through the walls and disrupt your daily routine.

The constant exposure to such disturbances can have a negative impact on your physical and mental well-being. Here’s a closer look at the effects of noise disturbances in apartment living:

  1. Sleep disruption: Noise can make it challenging to get a good night’s sleep. Constant disturbances can lead to sleep deprivation, which can have detrimental effects on your overall health and cognitive function.
  2. Increased stress levels: Living in a noisy environment can elevate stress levels. The constant background noise can trigger a stress response, leading to heightened anxiety and irritability.
  3. Lack of privacy: Noise disturbances can invade your privacy, making it difficult to relax or engage in activities without feeling like you’re constantly being observed or heard.
  4. Reduced productivity: If you work or study from home, noise disruptions can significantly impact your productivity. Concentration and focus are crucial, and constant interruptions can hinder your ability to perform tasks efficiently.
  5. Strained relationships: Excessive noise can strain relationships with neighbors. Constant complaints or confrontations about noise disturbances can create tension and a hostile living environment.

Assessing the Existing Wall Structure

Assessing the Existing Wall Structure

Evaluating the materials used in the wall construction will help determine the most appropriate soundproofing solutions. Below, we are discussing how to identify common sound transmission points and how to evaluate the materials used in the wall construction.

Identifying common sound transmission points

  • Electrical Outlets and Switches: Electrical outlets and switches can create small gaps in the wall, allowing sound to pass through. Inspecting these areas for any cracks or openings and sealing them with acoustic sealant or putty can help reduce sound transmission.
  • Doors and Windows: These are often weak points in terms of sound insulation. Weatherstripping around doors and windows can help create a tighter seal, minimizing sound leakage. Installing heavy, solid-core doors or adding soundproofing materials to existing doors can also improve soundproofing.
  • Vents and Ducts: Air vents and ducts can transmit sound between apartments. Checking for gaps or leaks around these openings and using acoustic insulation or duct sealant to seal them can significantly reduce noise transfer.
  • Structural Cracks and Gaps: Inspect the walls for any cracks, gaps, or holes that can allow sound to pass through. Sealing these with acoustical caulk or putty can help create a more soundproof barrier.

Evaluating the materials used in the wall construction

  • Wall Thickness: Thicker walls generally offer better sound insulation. If the existing walls are thin, adding an additional layer of drywall can help enhance soundproofing.
  • Insulation: Check if there is insulation within the walls. Insulation helps absorb sound and reduce its transmission. If there is no insulation present or the existing insulation is insufficient, adding soundproofing insulation such as mineral wool or cellulose can improve soundproofing performance.
  • Studs and Framing: The type of studs and framing used in the wall can affect sound transmission. Metal studs transmit sound more readily than wooden studs. If metal studs are present, adding resilient channels or soundproofing clips can help decouple the wall surfaces and minimize sound transfer.
  • Mass and Density: The mass and density of the wall materials influence soundproofing effectiveness. Materials such as concrete, mass-loaded vinyl, or soundproof drywall are denser and provide better sound insulation. Consider replacing or adding these materials to enhance soundproofing.

Choosing the Right Soundproofing Materials

Choosing the Right Soundproofing Materials

The right choice of materials can significantly reduce the transmission of noise, providing a more peaceful and comfortable living environment. Here are different types of acoustic insulation, discuss the benefits of mass-loaded vinyl sheets, and consider sound-dampening drywall options.

Exploring different types of acoustic insulation

Acoustic insulation plays a vital role in blocking sound transmission between apartments. Here are some popular types of acoustic insulation to consider:

  1. Fiberglass insulation: Fiberglass batts or rolls are widely used for soundproofing walls. They are easy to install and offer good thermal insulation properties as well. Make sure to choose high-density fiberglass insulation with a higher sound transmission class (STC) rating for better noise reduction.
  2. Mineral wool insulation: Mineral wool, also known as rock wool or stone wool, is an excellent option for soundproofing walls. It has exceptional sound-absorbing properties and can effectively reduce airborne and impact noise. Mineral wool is resistant to fire, moisture, and pests, making it a durable choice.
  3. Cellulose insulation: Made from recycled paper and treated with chemicals for fire resistance, cellulose insulation is an eco-friendly option for soundproofing. It offers good sound absorption and can fill gaps and voids effectively, reducing sound leakage.

Selecting appropriate mass-loaded vinyl sheets

Mass-loaded vinyl (MLV) sheets are an effective soundproofing material that can be applied to walls. Here’s what you need to know when choosing MLV sheets:

  1. Thickness and weight: MLV sheets are available in different thicknesses and weights. Thicker and heavier MLV sheets provide better soundproofing performance. Look for MLV sheets with a minimum thickness of 1/8 inch and a weight of at least one pound per square foot.
  2. Installation: MLV sheets are typically installed by attaching them to the existing wall or sandwiching them between layers of drywall. Ensure proper sealing of seams and edges to prevent sound leakage. You can also use adhesive or nails to secure the MLV sheets in place.

Considering sound-dampening drywall options

Sound-dampening drywall, also known as soundproof drywall or acoustic gypsum board, is specifically designed to reduce noise transmission. Here are some options to consider:

  1. Soundproof drywall: Soundproof drywall consists of multiple layers of gypsum board with viscoelastic polymers sandwiched between them. It provides enhanced sound-dampening properties compared to standard drywall. It is easy to install and can be used in combination with other soundproofing materials for better results.
  2. Green glue: Green glue is a popular sound-damping compound that is applied between layers of drywall. It converts sound energy into heat, reducing noise transmission. Green glue is cost-effective and compatible with different construction materials.

Preparing the Wall for Soundproofing Installation

Preparing the Wall for Soundproofing Installation

Creating an effective soundproof barrier between apartments starts with thorough preparation of the wall. By taking the necessary steps to prepare the wall surface, you can optimize the effectiveness of your soundproofing efforts. These are the key tasks involved in preparing the wall for soundproofing installation.

Clearing the wall surface of any obstacles or fixtures

Before you begin soundproofing, it is crucial to clear the wall surface of any obstacles or fixtures that may hinder the installation process. Remove any artwork, shelves, or decorative items from the wall.

Take down curtains, blinds, and other window treatments as well. By ensuring a clear surface, you can work efficiently and achieve better results.

Repairing cracks, holes, and gaps in the wall

Inspect the wall carefully for any cracks, holes, or gaps, as these can compromise the soundproofing effectiveness. Use a putty knife to scrape away loose debris and dirt from the affected areas. For small cracks or holes, you can fill them with an acoustic caulk or sealant.

For larger gaps, consider using an expanding foam sealant. Allow the sealant to dry completely before moving on to the next step.

Applying a sealant to ensure an airtight barrier

To create an airtight barrier and prevent sound leakage, applying a sealant is essential. Acoustic sealants are specifically designed to reduce sound transmission and provide airtight seals. Using a caulking gun, apply the sealant along the edges of the wall, including corners, baseboards, and electrical outlets.

Pay attention to any gaps or spaces around windows and doors as well. Ensure a thorough application, and smooth out the sealant with a putty knife for a neat finish.

Installing Soundproofing Measures

By implementing the right techniques, you can create a more peaceful and private living environment. Below are various soundproofing methods that can make a substantial difference in minimizing unwanted noise transfer.

Installing Resilient Channels to Decouple the Wall

Resilient channels are an excellent solution for decoupling the wall structure and reducing sound transmission. These metal channels are designed to create an air gap between the existing wall and the new drywall layer. To install resilient channels, follow these steps:

  1. Start by removing the existing drywall on the side of the wall you wish to soundproof.
  2. Attach the resilient channels horizontally, ensuring they are spaced appropriately according to the manufacturer’s instructions.
  3. Secure the channels to the studs using screws, making sure they are level and straight.
  4. Once the resilient channels are in place, install the new layer of drywall onto them, using screws specifically designed for resilient channels.
  5. Finish the wall by applying joint compound, sanding, and painting.

The decoupling effect created by resilient channels helps to break the direct path of sound waves, reducing their ability to travel through the structure of the wall.

Adding Acoustic Insulation Between Studs

Another effective method to enhance soundproofing is by adding acoustic insulation between the studs of the wall. Acoustic insulation materials, such as mineral wool or fiberglass batts, help absorb and dampen sound waves. Follow these steps to install acoustic insulation:

  1. Measure the spaces between the studs and cut the insulation batts to fit snugly.
  2. Insert the insulation between the studs, ensuring it fills the entire cavity tightly.
  3. Use a utility knife to trim any excess insulation protruding beyond the studs.
  4. Repeat this process for each stud cavity in the wall.

By adding acoustic insulation, you create an additional barrier that absorbs sound energy and prevents it from traveling through the wall.

Applying Mass-Loaded Vinyl Sheets to the Wall Surface

Mass-loaded vinyl (MLV) sheets are an effective soundproofing material that can be applied directly to the existing wall surface. Here’s how to install MLV sheets:

  1. Measure the dimensions of the wall and cut the MLV sheets accordingly.
  2. Clean the wall surface thoroughly to ensure proper adhesion.
  3. Apply an adhesive recommended for MLV to the backside of the sheets.
  4. Press the MLV sheets firmly onto the wall, starting from the top and working your way down.
  5. Smooth out any air bubbles or wrinkles using a roller or a hand tool.
  6. Trim the excess MLV using a utility knife.
  7. Seal the seams between the sheets using acoustical caulk.

MLV sheets add mass to the wall, which helps block sound transmission and reduces airborne noise.

Installing Sound-Dampening Drywall over the Existing Wall

Sound-dampening drywall, also known as soundproof drywall or quiet rock, is specifically designed to enhance sound insulation. To install sound-dampening drywall over the existing wall, follow these steps:

  1. Remove any trim or molding from the existing wall.
  2. Measure the dimensions of the wall and cut the sound-dampening drywall sheets to fit.
  3. Apply a construction adhesive to the back of the drywall sheets.
  4. Press the drywall sheets firmly onto the existing wall, ensuring they are aligned properly.
  5. Screw the drywall sheets into place, using screws designed for sound-dampening drywall.
  6. Apply joint compound, sand, and finish the surface as you would with regular drywall.
  7. Reinstall the trim or molding to complete the installation.

Finishing Touches and Additional Considerations

Sealing gaps and edges for optimal soundproofing

When it comes to soundproofing a wall between apartments, sealing any gaps and edges is crucial for achieving optimal results. Even the smallest openings can allow sound to leak through, so pay close attention to the following areas:

  • Windows and Doors: Use weatherstripping or door sweeps to seal gaps around windows and doors. This will help prevent sound transmission through these common entry points.
  • Electrical Outlets and Switches: Install foam gaskets behind outlet and switch covers to create a tight seal. These gaskets are readily available at hardware stores and are easy to install.
  • Baseboards and Crown Molding: Inspect the edges where baseboards and crown molding meet the wall. Apply a high-quality acoustic caulk to seal any gaps or cracks. This will help prevent sound from traveling through these openings.
  • Vents and Air Ducts: Consider installing acoustic baffles or soundproof covers over vents and air ducts. These can help minimize sound transfer while still allowing proper air circulation.

Enhancing soundproofing with curtains, rugs, and furniture placement

In addition to addressing structural gaps, you can further enhance soundproofing by implementing certain elements in your apartment’s interior design. Consider the following techniques:

  • Thick Curtains and Drapes: Hang heavy, densely woven curtains or drapes over windows to help absorb sound waves. Opt for materials like velvet or thick blackout curtains, as they offer better sound insulation properties.
  • Area Rugs and Carpeting: Covering hard floors with thick area rugs or wall-to-wall carpeting can significantly reduce sound transmission. These materials help absorb airborne sound and minimize footfall noise.
  • Furniture Placement: Strategically placing furniture against shared walls can act as a buffer and help reduce sound transfer. Consider positioning bookshelves, cabinets, or upholstered furniture against the problem areas.
  • Acoustic Panels: Install decorative acoustic panels on the walls. These panels are designed to absorb sound waves and can effectively reduce noise transmission between apartments. They come in various designs and colors, allowing you to incorporate them seamlessly into your interior decor.


In conclusion, soundproofing a wall between apartments is a practical and effective solution to create a peaceful living environment. By implementing the right techniques and materials, you can significantly reduce the transfer of noise and enjoy a more comfortable and private space.

By investing in soundproofing measures, you not only enhance your own quality of life but also show consideration for your neighbors. Living in a peaceful environment promotes relaxation, productivity, and overall well-being.

As you embark on your soundproofing journey, don’t hesitate to consult with professionals or seek guidance from experienced individuals. With their expertise and your determination, you can create a quieter and more enjoyable living space, free from the disturbances of neighboring noise.

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Brendan Ratliff
Brendan Ratliff

As a soundproofing and acoustical professional, I have helped new homeowners, builders and remodelers with their projects. I also help contractors/designers learn how to properly install soundproofing in their clients homes.
I enjoy helping people understand the process of soundproofing and acoustical construction. is a one-stop solution for all of your soundproofing related questions.