How to Soundproof a Room with Thin Walls

Do you find yourself constantly distracted by noises coming from outside your room or from adjacent apartments? Maybe you live in an apartment with thin walls, or perhaps your home is located on a noisy street. Whatever the reason, unwanted noise can be a real problem for anyone trying to focus or relax in their own space. Fortunately, there are ways to soundproof a room with thin walls and reduce the amount of noise that enters or escapes. 

How to Soundproof a Room with Thin Walls? To soundproof a room with thin walls, you can add acoustic panels or soundproof wallpaper, use weather stripping on doors and windows, or hang heavy curtains. Another option is to build a second layer of drywall with a sound-dampening compound between the layers.

In this blog, we’ll explore some creative and effective strategies for soundproofing your space, so you can enjoy peace and quiet whenever you need it.

Types of Sounds

Types of Sounds

If you live in an apartment or a house with thin walls, you know how frustrating it can be to hear unwanted noises from the outside world or even from the next room. Fortunately, soundproofing can help reduce the amount of noise that enters or leaves your room.

But before you can soundproof your room, you need to understand the different types of sounds that can penetrate your walls. Here are the three main types of sounds that you need to be aware of when soundproofing a room.

Airborne Sound

Airborne sound is the most common type of sound that we hear in our daily lives. This type of sound travels through the air and can easily penetrate thin walls, ceilings, and floors. Examples of airborne sounds include voices, music, and the sound of a TV or radio.

To reduce airborne sound transmission, you need to create a barrier that can absorb or reflect the sound waves. Some effective soundproofing materials for reducing airborne sound include acoustic foam, fiberglass insulation, and mass loaded vinyl.

Impact Sound

Impact sound is created when an object hits or strikes another object. This type of sound is commonly heard when someone walks on a hardwood floor, drops a book, or slams a door. Impact sound can easily travel through walls and floors, making it difficult to reduce. To minimize impact sound, you need to isolate the source of the noise.

One effective method is to install a floating floor system that creates a cushion between the subfloor and the finished flooring. Another option is to use soundproof underlayment, which is specifically designed to reduce impact noise.

Flanking Sound

Flanking sound is the most challenging type of sound to address when soundproofing a room. It occurs when sound waves find a path around or through a sound barrier, such as a wall or door. Flanking sound can travel through air vents, gaps around electrical outlets, and even through the floor or ceiling. To minimize flanking sound, you need to identify the source of the noise and seal any gaps or openings.

This can be done using acoustic caulking, weatherstripping, or acoustic door sweeps. You may also need to install additional sound barriers, such as acoustic panels or mass loaded vinyl, to reduce the amount of sound that escapes through flanking paths.

Materials for Soundproofing

Materials for Soundproofing

Living in a noisy environment can be quite frustrating, especially if you’re unable to get the peace and quiet you need. Thin walls in a home or apartment can be a major source of noise pollution, causing sleep disturbances and other inconveniences.

Fortunately, there are ways to soundproof a room with thin walls to reduce the amount of noise that enters or exits it. One effective approach is to use specialized materials for soundproofing.

Here are some of the most popular materials used for soundproofing, including Mass Loaded Vinyl (MLV), Acoustic foam panels, Green Glue, Resilient channel, and Soundproofing curtains.

Mass Loaded Vinyl (MLV)

Mass loaded vinyl, commonly known as MLV, is a popular material used for soundproofing. This heavy, dense, and flexible material is ideal for blocking sound transmission through walls, floors, and ceilings. MLV is typically installed over existing walls, floors, or ceilings and then covered with drywall or other materials. MLV comes in rolls and is easy to cut and install. It is also non-toxic and safe for use in homes and other living spaces.

Acoustic foam panels

Acoustic foam panels are designed to absorb sound waves, reducing echo and noise. They are commonly used in recording studios and home theaters to improve sound quality. Acoustic foam panels come in different shapes and sizes and can be easily installed on walls or ceilings using adhesive strips or spray glue. They are also available in a variety of colors and designs to match the decor of any room.

Green Glue

Green Glue is a unique soundproofing material that is used between two layers of drywall or other building materials to reduce sound transmission. Green Glue is a viscoelastic compound that converts sound energy into heat, reducing the amount of sound that passes through walls. Green Glue is easy to apply and can be used in a variety of applications, including walls, ceilings, and floors.

Resilient channel

Resilient channel is a thin metal channel that is attached to the studs or joists in a wall or ceiling. The channel is designed to absorb vibrations and reduce the amount of sound transmitted through the wall or ceiling. Resilient channel is typically used in combination with other soundproofing materials, such as fiberglass insulation or acoustic foam panels, to provide maximum soundproofing performance.

Soundproofing curtains

Soundproofing curtains are a cost-effective way to reduce noise in a room with thin walls. These curtains are typically made of heavy, dense materials that absorb sound waves and reduce noise transmission. Soundproofing curtains can be used in a variety of applications, including bedrooms, home theaters, and recording studios. They are also available in different colors and designs to match the decor of any room.

Step by Step: Soundproofing a Room with Thin Walls

Step by Step: Soundproofing a Room with Thin Walls

If you live in an apartment or a house with thin walls, you know how frustrating it can be to hear your neighbors’ conversations, footsteps, or even their TV shows. Fortunately, soundproofing a room with thin walls is a doable DIY project that can significantly reduce noise transmission.

In the following paragraphs, we are going you through the step-by-step process of soundproofing a room with thin walls.

Assess the Room and Identify Problem Areas

The first step in soundproofing a room with thin walls is to assess the room and identify problem areas. This means checking for any gaps or openings in the walls, doors, windows, or floors. Common problem areas include electrical outlets, light switches, vents, and ducts. You can use a flashlight to detect any light leaks, which indicate the presence of gaps.

Add Mass to the Walls

The next step is to add mass to the walls. Mass is crucial for blocking sound because it absorbs the sound waves and prevents them from passing through the wall. You can increase the mass of your walls by adding another layer of drywall, mass-loaded vinyl, or acoustic panels. Drywall is the cheapest option, while mass-loaded vinyl and acoustic panels are more expensive but offer better soundproofing.

Install Soundproofing Materials

After adding mass to the walls, you should install soundproofing materials to further reduce noise transmission. Soundproofing materials include fiberglass insulation, acoustic foam, and green glue. Fiberglass insulation is an affordable and effective option that can be installed between the studs.

Acoustic foam is a more expensive option that can be attached to the walls or ceiling. Green glue is a specialized damping compound that can be sandwiched between two layers of drywall.

Seal Gaps and Openings

Sealing gaps and openings is another critical step in soundproofing a room with thin walls. Even small gaps can allow sound waves to pass through, so it’s essential to seal them. You can use acoustic sealant, weatherstripping, or door sweeps to seal gaps around doors and windows. For electrical outlets and light switches, you can use acoustic putty pads or foam gaskets to fill the gaps.

Create a Room-Within-a-Room

If you want to achieve maximum soundproofing, you can create a room-within-a-room. This involves building a second wall inside the existing wall, which creates an air gap that acts as a sound barrier.

The inner wall should be separated from the existing wall by at least one inch and should not be attached to the ceiling or the floor. The space between the two walls can be filled with insulation or other sound-absorbing materials.

Add Soundproofing Furnishings

You can add soundproofing furnishings to further reduce noise transmission. These include heavy curtains, area rugs, bookshelves, and upholstered furniture. Heavy curtains can be hung over windows and doors to block sound and light. Area rugs can be placed on the floor to absorb sound.

Bookshelves can act as sound barriers if they are filled with books or other sound-absorbing materials. Upholstered furniture can also help to absorb sound.

Soundproofing Windows and Doors

Soundproofing Windows and Doors

When it comes to soundproofing a room with thin walls, the doors and windows are often the weakest link. They can let in a lot of noise from outside, and also allow noise from inside to escape. Below are some effective ways to soundproof your doors and windows to minimize noise transmission.

Weatherstripping for doors and windows

Weatherstripping is a simple and cost-effective way to soundproof your doors and windows. It involves sealing any gaps or cracks around the edges of the doors and windows using a specialized material that creates an airtight seal. This can help to prevent the transmission of sound waves through these openings.

There are different types of weatherstripping materials available, such as foam tape, silicone caulk, and rubber seals. Foam tape is ideal for small gaps, while silicone caulk is better for larger gaps. Rubber seals are perfect for sliding windows and doors.

To apply weatherstripping, clean the area around the door or window frame thoroughly and let it dry completely. Cut the weatherstripping material to the appropriate size and apply it to the gaps or cracks around the frame, making sure to press it firmly into place. Once the weatherstripping is in place, test the door or window to make sure it closes properly and that there are no gaps remaining.

Soundproofing curtains or blinds

Another effective way to soundproof your doors and windows is to use soundproof curtains or blinds. These specialized curtains or blinds are made of heavy materials that can absorb sound waves and prevent them from entering or leaving the room.

Soundproof curtains are typically made of thick, dense materials such as velvet, wool, or polyester. They are designed to hang all the way to the floor to create an effective sound barrier. Soundproof blinds, on the other hand, are made of heavier materials such as vinyl or wood and can be custom-fit to the size of your windows.

To install soundproof curtains, simply hang them on a curtain rod using hooks or rings. Make sure that the curtains are long enough to cover the entire window and that they are not too tight against the wall. For soundproof blinds, you may need to hire a professional to install them properly.

Adding solid-core doors

If your room has thin, hollow-core doors, replacing them with solid-core doors can significantly reduce noise transmission. Solid-core doors are made of dense materials such as wood or metal and are much more effective at blocking sound waves than hollow-core doors.

To install a solid-core door, you may need to hire a professional to ensure that it fits properly in the frame and is installed correctly. If you have some DIY skills, you can install it yourself with some basic tools.

Maintaining Soundproofing Effectiveness

Once you have successfully soundproofed your room, it is important to ensure that the soundproofing materials and strategies are maintained to ensure their effectiveness over time. Regular inspection and repair, updating and adjusting strategies, and educating family members and roommates about noise etiquette can all contribute to the maintenance of a soundproofed room.

Regularly inspect and repair soundproofing materials

Inspecting and repairing soundproofing materials regularly is crucial to maintaining their effectiveness. Over time, soundproofing materials can wear out or become damaged, compromising their ability to block out noise. It is important to check for any cracks, gaps, or holes in the walls, ceilings, or floors where sound can leak through.

Ensure that any soundproofing products such as acoustic foam, mass loaded vinyl, or sound-absorbing curtains are still in good condition and functioning as they should.

Update and adjust soundproofing strategies

As your lifestyle changes or if new noise issues arise, it may be necessary to update and adjust your soundproofing strategies. For example, if you have a new neighbor who is noisy at night, you may need to add additional sound-absorbing materials to your walls or floors.

Similarly, if you have purchased new electronics that produce more noise, you may need to reconsider the placement of your soundproofing materials.

Educate family members and roommates about noise etiquette

It is important to educate family members and roommates about noise etiquette to ensure that they respect your need for a quiet and peaceful environment. Discussing the importance of keeping noise levels down, particularly during certain times of the day or night, can help to prevent noise disturbances and maintain the effectiveness of your soundproofing efforts.

Consider setting up a shared agreement on noise levels and etiquette to ensure that everyone is on the same page.

Costs and Budgeting

When it comes to soundproofing a room with thin walls, the costs can add up quickly. There are budget-friendly alternatives and long-term benefits to consider before deciding on the most effective solution for your situation. Following are the different factors to consider when estimating soundproofing costs, budget-friendly alternatives, and weighing the long-term benefits and costs of soundproofing a room.

Estimating soundproofing costs

Estimating the cost of soundproofing a room will depend on several factors such as the size of the room, the type of walls, and the level of soundproofing required. A professional soundproofing company can provide a detailed estimate, but it’s helpful to have an idea of the general costs involved. For a typical 10×10 room, basic soundproofing materials such as acoustic panels and soundproof curtains can cost between $300 and $500.

More advanced solutions such as soundproof drywall, green glue, and acoustic foam can cost anywhere from $1,000 to $2,500, depending on the size of the room and level of soundproofing required. Keep in mind that hiring a professional installer can also add to the cost.

Budget-friendly soundproofing alternatives

If you’re on a tight budget, there are still several soundproofing alternatives that can help reduce noise transmission without breaking the bank. One of the most cost-effective solutions is using acoustic panels, which can be easily mounted on walls and ceilings. Soundproof curtains are also an affordable option and can be hung over windows and doorways to reduce noise transmission.

Another budget-friendly alternative is using weather stripping to seal gaps around doors and windows. Rearranging furniture and adding rugs and tapestries can help absorb sound and reduce echo in a room.

Weighing long-term benefits and costs

While soundproofing a room can be costly, it’s important to consider the long-term benefits and costs. Soundproofing can improve the quality of life by reducing noise levels and increasing privacy. It can also increase the value of your home or property. Investing in quality soundproofing solutions can save you money in the long run by reducing energy costs and preventing damage to your property caused by excessive noise levels.

When weighing the long-term benefits and costs, it’s important to consider the level of soundproofing required, the materials used, and the expected lifespan of the solution. Investing in high-quality soundproofing solutions may be more expensive upfront but can save you money and provide a better quality of life in the long run.


There are several ways to soundproof a room with thin walls. You can use insulation, hang acoustic panels or soundproof curtains, or apply soundproof paint. Another option is to install a mass-loaded vinyl barrier or build a separate soundproof room within the existing space.

In conclusion, having a soundproofed space is essential for creating a peaceful and quiet environment in your home or office. Thin walls can be a major source of noise pollution, and can be particularly troublesome if you live in a noisy neighbourhood or have noisy neighbours. 

However, there are many solutions available for soundproofing your space that can be customized to meet your unique needs. Whether you are looking to block out external noise or simply reduce the amount of noise that escapes from your space, there are soundproofing options that can help. Investing in a soundproofed space can have a significant impact on your overall well-being and productivity, making it well worth the time and effort to find the right solution for your needs.

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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.