How to Soundproof a Hollow Core Door

Doors are one of the biggest culprits in bringing noise to your house.

A hollow core door is unable to block any kind of noise.

So to soundproof your house, you need to soundproof the hollow core doors of your house.

This article is all about understanding how to soundproof a hollow core door to create a more peaceful and quiet space for yourself.

How to soundproof a hollow core door?

Can you make your hollow core door block noise, if you’re wondering?

Yes, you can.

You just need to follow some techniques.


Acoustic foam panels

You need to add mass to your hollow core door.

Adding mass increases the number of molecules.

This way, the sound waves have to travel through more molecules.

So most of the noise gets absorbed or deadens while passing through molecules.

You can use acoustic foam panels to add mass, which absorbs noise easily.

They are not soundproofing material, but they absorb the noise and make it unable to bounce back to foam echo.

They are easily available in the market, and also they are budget-friendly.

To install them, you can simply paste them on your hollow core door’s surface.

This will work fine.

If you want to go next level, add acoustic foam panels inside the hollow core door to make it solid.

This will require a little more work.

You must remove the door from its hinges and install the foam material inside it.

If you want, you can also get help from a professional who will perform this task better.

Also, just to add to your information, these acoustic foam panels will work very effectively for any other soundproofing project.


Use a door sweep

A door sweep is a must if you want to soundproof a door, whether it is a hollow or solid core door.

The space or the gap present between the floor and the door allows a lot of noise to come inside.

To block the noise, you need to cover that space.

The best option to cover it is to install a door sweep.

Most of the door sweeps are made up of rubber-like material, which does not disturb the opening and shutting of the door.

Along with blocking the noise, a door sweep also blocks the way for the dust and bugs to come inside.

So when you’re up for other strategies to soundproof your hollow core door, a door sweep is a must.


Weather-stripping the door

Typically weather stripping is used for windows, but it’s no surprise that you can also use them for your doors.

They make the door airtight, preventing sound, air, and dust from passing through it.

Remember, if air can pass through the door, so can the noise.

So take help from weather-stripping by blocking all the empty spaces between the door and the door frame.

It is made up of adhesive material that easily sticks to the wall or any other surface.

You must clean the area where you’re applying it before you start the process.

Otherwise, any dust on the surface will make it unable to stick properly.

Once you’re done with the work, you’ll be surprised how finely airtight your door has become.

So along with blocking the noise, dust, and bugs from coming inside, the door will also stop slamming and making noises.

Be smart and kill two birds with one stone.


Soundproofing sealant

Soundproofing sealants are available easily in the market.

They are cheap and very effective in soundproofing.

They can fill in any empty spaces or cracks in the door that may help bring most of the outside noise.

So to make your door completely soundproof, you need to fill the cracks of your hollow core door.

If it’s difficult for you to find cracks, I have a technique for you to find them easily.

Turn off all the lights in your room and make the room completely dark during the daytime.

Now while sitting inside the room near the door, closely observe if there is any point from where the light is coming inside.

Any point where you see the light on the door is a crack or a gap.

These gaps are responsible for bringing the noise inside.

So, fill in all these cracks and gaps with soundproofing sealant using a caulking gun.

After you’ve applied the soundproofing sealant neatly, paint over it using the same color your door has been painted with.

This will make your hollow core door look presentable and neat again.


Soundproofing blankets

Soundproofing blankets is another great strategy to make your hollow core door soundproof.

You just need to hang a soundproof blanket along your hollow core door, and you’re done.

It’s as simple as that.

Soundproof blankets are made of heavy and thick material, which helps absorb and dampen most of the noise.

The soundproofing blankets will absorb any noise passing through the hollow core door.

So your room will remain very much peaceful and quiet.

If you’re worried these soundproofing blankets will not look good on your doors, you need not do that.

This is because nowadays, they are available in a variety of colors, designs, and patterns.

You can buy the one that nest goes with the interior of your room.

Also, you can also hang these soundproofing blankets on the walls for some more soundproofing.

You just need to have a curtain rod to hang them on for this.


Place rugs

Carpets and heavy rugs help in absorbing a lot of noise.

So when you think your hollow core door brings in a lot of noise, you can go for a carpeted floor.

This way, the carpet will absorb most of the noise that enters through the hollow core door.

You can simply place a heavy rug near the door if you cannot go for a carpeted floor.

So the noise that might enter through the door will be absorbed by the rug, and the impact of the sounds will be less now.

If you want to go further with soundproofing, you can even place the rugs on both sides of the door.

This way, most of the noise will not pass through the door because the rugs will absorb it in front of it.

And some noise that may enter through the hollow core will be absorbed by the rug on the other side of the door.

This may cost a little bit more because you need to buy thick and heavy rugs.

Remember, the thick the rug, the more noise it will absorb.

If you use rugs, weather-stripping, and install a door sweep, the hollow core door will become pretty much soundproof.

Also, using rugs will add to the aesthetics of your door because very pretty rugs are available in the market these days in various colours and designs.

Replace the hollow core door with the solid core door

If all the strategies fail to make your hollow core door completely soundproof, replace your hollow core door with a solid core door.

Be realistic and practical.

You cannot make any door completely soundproof.

Using the above strategies will make your hollow core door soundproof to some extent.

But if you want to make your door hundred percent soundproof, that would not be possible.

Replacing your hollow core door with a solid core door will require more budget.

Solid core doors are heavy and made up of wood through and through.

They are also expensive.

They are mostly made up of solid wood like mahogany and oak.

Most modern houses have hollow core doors installed in them, except for the main doors that lead to the front or back of the house.

If you want to test whether your door is a hollow core door or a solid core door, you can just find it out by knocking on the door.

Moreover, if there’s an echo when your knock on the door, it’s probably a hollow core door.

If the door wobbles when you knock on the door, it’s most probably a solid-core door.

The door’s weight also tells whether it’s solid or hollow.

Hollow core doors are light in weight, while solid core doors are heavy.

So if you want more soundproofing, you can replace your hollow core door with a solid one.

This is because solid core doors are dense, which makes the sound waves unable to travel through them.



So to conclude it all, we will say that a hollow core door can not be made one hundred percent soundproof.

We need to be realistic and practical.

So, it’s up to you which strategies you choose and combines to reduce noise to come inside your room.

The noise can be reduced, but it cannot be blocked completely.

Remember that any one of the above strategies will never be able to work for your hollow core door to reduce noise unless you combine it with some other.

Some of these are expensive strategies, while some are cheap.

Some require help from a professional, while you can do some on your own.

Choose the one that best works for you.




1) Why do I need to soundproof my hollow core door?

A: Hollow core doors are not as soundproof as solid doors and can let in a lot of noise. Soundproofing your door can help reduce the noise levels in your space and provide you with a more peaceful environment.


2) What materials do I need to soundproof my hollow core door?

A: You can use a variety of materials to soundproof your door, such as weatherstripping, acoustic foam, mass-loaded vinyl, or door sweeps. The specific materials you need will depend on the level of soundproofing you want to achieve.


3) How do I measure my door for soundproofing materials?

A: Measure the width and height of your door, as well as the depth of any grooves or panels. Use these measurements to purchase materials that fit your door and its features.


4) Can I soundproof my hollow core door without professional help?

A: Yes, you can soundproof your door yourself using the right materials and tools. There are many online resources available that can guide you through the process.


5) Will soundproofing my hollow core door completely eliminate noise?

A: While soundproofing your door can greatly reduce the amount of noise that comes through it, it may not completely eliminate all noise. The effectiveness of your soundproofing efforts will depend on the materials used and the level of soundproofing you want to achieve.

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