Soundproof a Boiler Room: Full Guide With Images

Tired of the boiler noise that is constantly disturbing you? If you have a boiler room, you know what I am talking about. With a constant buzzing sound, watching a TV in your free time, having a decent sleep, and spending a peaceful time with your family is almost impossible. Yet there is one thing you can do to change all that – learn how to soundproof a boiler room and finally get rid of that annoying sound.

After reading this article, you will be able to completely eliminate the boiler noise. I have listed some of the best soundproofing methods. Also, I have some great tips and tricks from soundproofing experts which I am sure will be really helpful to you.

A boiler room

Soundproofing a boiler room may take some time and energy. I have done a lot of soundproofing stuff and I am aware that soundproofing sometimes can really be a challenge especially if we are talking about soundproofing a boiler room

However, with a detailed guide and the right materials, you definitely can do a great job if you decide to take that step and learn how to soundproof a boiler room all by yourself.

Considering that you are here, reading this post, I am sure that you are already ready for the challenge.

So let’s get rolling!

Interview With a Soundproofing Expert

To get more information and in-depth knowledge of soundproofing a boiler room, I interviewed Ted Wiedman from Acoustical Surfaces, INC, and asked him to share his experience on soundproofing a boiler room. He shared some pretty amazing tips that I am sure will help you out a lot:

Make sure that your boiler is in good condition

That’s why before you go on and start to soundproofing the entire boiler room, you should first look through your boiler machine. In many cases, its just the boiler machine that needs a technical fixOr sometimes, you will just have to soundproof a small portion of the boiler and the noise will be completely GONE!

The boiler pipes are isolated to soundproof a boiler room

You need to identify where the sound is coming from.

The boiler is a large and heavy machine, of course, it will make some noise. But if your boiler is making a loud banging or creaking noise that is uncomfortable to the ears, you need to get your boiler checked.

There is a possibility that your boiler had some problem, you got it fixed and it’s all good now. But there is also a possibility that you might have to soundproof that part of the boiler in order to remove that annoying noise.

Other than that, you should definitely identify the source of the noise. It can sometimes be the boiler’s extended pipe that is vibrating and hitting the wall that is making the noise.

If that’s the case, you should isolate that pipe and make it stop touching the wall by using any soundproofing method.

Or, if it is the boiler’s generator that is producing such a loud noise, you can calm it down by placing it over a rubber pad or heavy springs.

In this way, you can save your time and money as you would not have to soundproof the entire room, but only the boiler.

What are the best materials to soundproof a boiler room?

Some of the best materials to soundproof a boiler room are:

  • Fiberglass Panels
  • Mass Loaded Vinyl (MLV)
  • Soundproof Paint
  • Mineral Wool Insulation
  • Green Glue
  • Soundproof Weather Strips

With these soundproofing materials, you will eliminate the boiler noise completely.

Things You Need To Soundproof In A Boiler Room

In order to completely block the noise from the boiler room, you will have to cover up many areas. To start off, you should soundproof the wall that separates the boiler room from the rest of the house.

It will eliminate 70% of that annoying boiler noise. However, if you want absolute silence, you need to soundproof all the remaining areas of your boiler room.

Remember, sound needs just a tiny area to escape. That’s why you will have to make sure to cover up all the cracks and fill in all the gaps like in the doors and windows. By doing this, you will be able to eliminate the boiler noise completely.

Let’s start with the most essential things you should soundproof in a boiler room.

Soundproof a Boiler Room Walls

Starting out on soundproofing your boiler room? Start with the walls. By soundproofing the walls of your boiler room, you can actually muffle 70% of the noise that was causing you discomfort.

Walls are one of the major reasons of noise escaping from the room. There are so many ways that you can apply to soundproof a wall.

In most cases, soundproofing a wall can be enough and you will not have to soundproof the entire room.

So when you are soundproofing your boiler room, make sure to choose the best soundproofing method for the walls. 

If you don’t know which are those, these are the ones that Ted recommended to me:

Mineral Wool Insulation

If you are in search of the best soundproofing or sound blocking material for your boiler room, Mineral Wool tops the list.

Mineral Wool is a fibrous material that is used to fit in between the studs and cavities of the walls or ceilings. It will absorb and block the boiler noise and you will not be able to hear it even if the boiler room is on the same floor.

The Mineral Wool Insulation is designed to be more effective than many soundproofing methods out there.

It is structured in a way that prevents the movement of air, thus reducing noise. Mineral Wool can be categorized into two parts.

  • Glass Wool Insulation
  • Stone Wool Insulation

Apart from blocking and absorbing the noise, Mineral Wool provides thermal and fire insulation as well.

Mineral Wool being installed to soundproof a boiler room

Mineral Wool has the ability to fight a fire. It is designed to perform in less than 400 degrees temperature, so it is a perfect fit for your boiler room.

It is extremely lightweight and is very easy to install anywhere. So if you are a DIY enthusiast, you can install Mineral Wool Insulation yourself in your boiler room and get rid of the noise completely.

They also don’t produce an echo, so here is a plus point.

Installing Mineral Wool is a little towards the pricey side, but since this is the only soundproofing method you will need for your boiler room, it is worth the time and the money.

If you decide to give it a shot, I will recommend you to have a look at this mineral wool on Amazon.

Soundproof Paint

A soundproof paint sounds interesting, right? Well, it is. Let me tell you why.

Even though soundproof paint is just a little thicker and denser than your normal paint, they can still do wonders and block the noise that is disturbing you. Soundproof paint is water-based and is easily available.

The key ingredient soundproof paints have to block the noise is latex. Latex provides sound blocking properties that can actually help in eliminating the sound. Because latex is thick inconsistency, it can be used to fill in any gaps and cracks in the walls.

Thanks to that, soundproof paint may look a little chunky and thick when applied to the walls.

A soundproofing paint to soundproof a boiler room


Now here is some bad news. Soundproof paint works and will help in cutting down the noise. But you cannot use soundproof paint as the only method of soundproofing your boiler room.

You will have to pair it up with any other method of soundproofing to get 100% results.

Soundproof paint might work for you if your boiler is not making an insanely loud noise. You will just have to see what works for you.

So if you are looking for an affordable way to soundproof a boiler room, soundproof paint might be the one for you.

This one on Amazon is considered to be one of the best soundproof paints so check it out!

Green Glue Noise Proofing Compound

You must have heard of green glue, right? It is one of the most used and the most trusted soundproofing methods out there.

Green Glue is a fast, simple, and cost-effective way of soundproofing your boiler room.

Green Glue being applied to the corners of the walls to soundproof a boiler room

There are four types of Green Glue available:

  • Green Glue Sealant
  • Green Glue Noise Proofing Compound
  • Joist Tape
  • Clips

The Noise Proofing Compound is a sound dampening product that breaks up the vibration caused by the sound waves.

All you need to do is to apply the green glue between two materials. The Green Glue Compound will block the sound that was traveling from one room to the other, creating the noise.

You can use the Green Glue Noise Proofing Compound between two layers of material like drywall, between two floors, the doors, or anything from where the sound can pass through.

To apply the green glue, all you need is a caulking gun that will help you in applying the glue between two rigid layers.

You will notice an amazing drop in the boiler noise after 30 days of application, that is when the green glue reaches its peak performance.

It doesn’t matter if you are an expert or just someone who likes to do DIY stuff, you can easily apply green glue to soundproof your boiler room. It is very easy to apply and you will be done soundproofing the entire boiler room in just a day- or even less.

To see how exactly you should apply a Green Glue, check out this video:

Green Glue is one of the easiest methods to use for soundproofing and is the one that will not dent your wallet. You can purchase it here on Amazon.

Soundproof your Boiler Room Ceiling

Even if your boiler room is downstairs, the noise can still be very annoying. To get rid of the constant buzzing sound, you need to cover up the boiler room’s ceiling as well.

You can apply the same soundproofing material to your ceiling as you did for your boiler room walls. Keep in mind that you should apply the soundproofing material inside, outside, or both. As a matter of fact, you will get maximum results by soundproofing both sides.

The best part is, soundproofing your ceiling will not be heavy on your pockets. You can soundproof your boiler room’s ceiling in by yourself.

Here are some soundproofing methods for your boiler room’s ceiling.

Sound Silencer Panels

Sound Silencer Panels are also known as “Planks” so if you see them under that name, do not get confused. The best thing about them is that they are easier to use than other soundproofing options.

Let’s have a look at all pros of installing Sound Silencer Panels.

  • They work pretty well, outdoors, and indoors.
  • Easy on your pockets.
  • Sound Silencer Panels are easily cleanable. You can clean them easily without putting so much of effort.
  • They can resist moisture. So, you don’t have to worry about fungi or bacteria building up.
  • Easy to install. You won’t need any help in putting them up.

Considering all these, you can effectively soundproof your boiler room by putting up Sound Silencer Panels.

As I have already mentioned, they are very easy to install as well. You just need glue, measuring tape and a pencil (to mark), and voila!


Sound Silencer Panels.


Of course, there are more methods to install Silencer Panels. The one I told you was the easiest and the quickest way.

You can not only cover your ceilings with Sound Silencer Panels, but you can also install them on the walls of your boiler room to block the unnecessary noise.

If this is exactly what you were looking for then you can order them here on Amazon.

Mass Loaded Vinyl (MLV)

Mass Loaded Vinyl (MLV) has been here for ages and is still people’s first choice for soundproofing a boiler room or any room in general.

The boiler room may be a little hard to soundproof (because of the impact noise that it produces). MLV can surely help you cancel out the noise in one go. That means you don’t have to pair this soundproofing method with any other, which takes a lot of your time and of course, energy.

Mass Loaded Vinyl being installed on a wall to soundproof a boiler room

Now, what is Mass Loaded Vinyl (MLV)?

Mass Loaded Vinyl (MLV) is basically is a high-density acoustic sound barrier that blocks off any reflected noise. It is a heavy rubber-like material implanted with little metal particles which makes it very heavy.

These qualities make Mass Loaded Vinyl one of the best methods to soundproof your boiler room.

If faced with high vibrating noise, like bouncing off a ball or loud hip hop music being played, MLV will absorb those and block all the noise that is being produced.

You can place your Mass Loaded Vinyl between two materials. You can also install it in your boiler room’s ceiling, and walls as well.

Let me tell you, MLV is a perfect soundproofing method for your boiler room.

Why? Because it is designed for higher temperatures, so you won’t have to worry about having a hot boiler and noisy boiler room.

It is also safe to use and is safe for your health if compared with most of the soundproofing methods.

After installing MLV in your boiler room perfectly, you will be able to get your good night’s sleep and distraction-free family time that you have been looking forward to.

Like anything else, you can buy it here while doing your shopping on Amazon.

Fiber Glass Panels

Another suitable option that you have for soundproofing your boiler room’s ceiling is by installing fiberglass panels. It is very good at absorbing the transmission of sound waves and it also helps in reducing the vibration.

Keep in mind that the noise that the boiler makes is an impact noise.

Soundproofing fiberglass is generally used to soundproof rooms with high impact noise, so that makes it the best option for you to work on.

Whether your boiler room is in your basement or on the same floor, fiberglass panels will work amazingly in absorbing the boiler noise.

Fiber Glass Panels on the ceiling.


Even though fiberglass panels are used by a lot of people to soundproof their boiler rooms, they will not eliminate 100% of the noise. Yes, that is correct.

You cannot rely on just fiberglass panels to soundproof your boiler room completely.

Combine using fiberglass panels along with any other soundproofing method to get an excellent result.

Along with soundproofing your boiler room’s ceiling, you can also soundproof the walls of your boiler room by using fiberglass panels that you can purchase here on Amazon.

If you want to learn more tips and tricks on How You can Soundproof your Ceiling, please give this a read!

Soundproof a Boiler Room Door

Doors are one of the main reasons for noise escaping and are often unnoticed.

People spend so much time and money on soundproofing their walls, ceilings, and floors. Yet they do not realize that the door is one of the main ways of sound escaping.

When soundproofing your boiler room, make sure to look out for the best soundproofing method for your door and do it first.

Soundproofing your boiler room’s door might look like a difficult task, but trust me, it’s not. You will find soundproofing your boiler room’s door very easy to do and is also very cost-effective.

So when you start the soundproofing your boiler room, make sure not to forget the door.

You can easily do that with soundproof blankets.

Soundproof Blankets to soundproof a boiler room door

Soundproof blankets can be one of the most convenient and easy-to-use methods that you can opt for to soundproof your boiler room.

You can use these blankets anywhere. So you can put them up on your walls and the doors of your boiler room to keep the boiler noise from escaping.

Most of the sound blocking blankets are made from polyester or fiberglass material. Both of these materials are great at absorbing the noise and also to provide insulation in the room.

The good part is, the blankets are very inexpensive and are easily available everywhere including here on Amazon. So you can get them even if you are on a budget without denting your wallet.

Soundproofing blankets covering the door and the walls.


Soundproof blankets are used by a lot of people in blocking noise from entering their house.

However, they do not absorb or cancel out 100% of the noise.

Soundproof blankets will cancel out most of the noise that your boiler is making. But cannot eliminate it completely. So I will advise you to pair this soundproofing method with any other method to get the best results.

Once you have installed the soundproof blankets in your boiler room, the changes will be noticeable, even if it is not blocking the noise completely.

If you are interested in knowing other ways to soundproof a door then check out this video:

Soundproof a Boiler Room Windows

If your boiler room has windows, you need to soundproof those as well.

Even if you close the window all the way, you will still be able to hear the interfering boiler noise. So, it is important that you soundproof your windows too.

This will let no noise out of that room and you can enjoy your time peacefully in your home. Keep reading if you want to find out how to soundproof the windows as well.

Self-Adhesive Weatherstrip

Now you have soundproofed your entire boiler room, and there is a little gap on the door/ window frame that is making the noise to escape. It seems like a nightmare, right?

If that’s the case, a self-adhesive weatherstrip will be your lifesaver.

Weatherstrip can do wonders when it comes to noises that are passing through windows and doors. You can easily seal your window and door gaps by using a self-adhesive weatherstrip.

The best part is, you can do it all by yourself. You just have to apply it to the gaps in the boiler room door and on the windows. It will absorb most of the bothersome noise of your boiler every time.

Self-Adhesive Weather-Strip being installed on windows.


Did you know that foam is actually considered as one of the best soundproofing material? It can absorb 95% of the unwanted sound.

You can get a self-adhesive weatherstrip here on Amazon, it’s super cheap!

Professional Advice From Another Expert

To make things even more clear and acknowledgeable to you, I contacted Ralf Corin, who is a technical director of Suntech Noise Control.

I asked him for some professional advice and tips for soundproofing a boiler room. Here is what he has to say about the topic.

 I assume, by boiler room you mean the room in your villa where the heating system is located.  In Sweden, a boiler room is located usually in the basement.
The first thing you have to do is to identify the noise source like the boiler’s compressor, fan, pump, etc.

The next task is to isolate the source by encapsulating it with a hood or cap. Something that is made of heavy material and has no holes for the sound to escape. Then you have to eliminate the encapsulated noise by lining the hood with noise absorbing (usually porous) material.
After that, you will have to eliminate the vibrations of the boiler that is generated by the compressor.  You can eliminate the vibrations by placing it on rubber pads or isolators.

Now that you have handled the vibrations, you will have to eliminate the noise that anyhow escaped into the boiler room. You can cancel the noise produced by the boiler by lining the ceiling and walls with sound-absorbing materials as you did inside the hood.

If you still are not satisfied because the noise is getting into the ceiling up to the living room above or is getting into the wall into the neighboring room, studio, etc; you have to improve the wall/ceiling barrier performance which is a much bigger task. 

The main idea is to increase the weight of the wall by a factor of at least to compare to what you already have. Low frequencies are always more difficult to stop and require more effort in order to soundproof.

Sontech Noise Control has developed some innovative materials for soundproofing that are unique and effective to absorb and stop the noise. After 40 years in this specialty, we know how to fix your problems even if they are difficult or easy.”

Final Thoughts

A boiler is a big and heavy machine, it surely is going to make some noise. There are a lot of options that you can do from your end that can make the noise situation better.

The first thing that you can do is to check your boiler for maintenance. If your machine is making noise due to the pipe hitting on the wall, isolate that pipe. If its the generator that is making the noise, you can take care of that too.

Another option is to soundproof your boiler room, which I have listed and discussed some of the best ways for you to do so. You will be able to eliminate the boiler noise completely by following the steps above.

Now, you can go ahead and get rid of the constant boiler noise!

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