Soundproof Interior Door: 8 Tips and Tricks! [2024]

Interior doors differ from exterior doors in many ways and understanding these differences is important when looking to soundproof doors.

Exterior doors are built from solid wood so they are heavier and interior doors are usually lighter, made from a softer wood, and have a hollow core.

This means that more sounds will pass through an interior door than an exterior one due to its weight and hollow core.

For this reason, interior door soundproofing will require a bit more work than exterior door soundproofing. 

Today, we will discuss a few ways you can soundproof interior doors without spending a ton of money like you would if you change the door.

Some of these tips and tricks can be used for door soundproofing your exterior doors as well so pay attention.

Why soundproof interior doors

door soundproofing for home office

Doors and windows are the biggest culprits to noise filtering into your home because they can have little gaps and cracks.

Number one reason to soundproof interior doors is if you are living in a shared space, noise from your roommates may disturb you when you’re trying to sleep or just want to relax.

You should also soundproof the interior doors if you work from home and you have noisy family members.

Most times interior doors are placed as a visual barrier without much thought about their soundproofing capabilities.

That is why it is up to you to figure out how to soundproof the door to regain some level of privacy and peace. 

What you’ll need

There are a few materials that will help you to soundproof your interior door.

Each one has its specific purpose so you should choose those that can do exactly what you need to be done.

  • Moving Blankets – first on the list is moving blankets, yes you read that right. Those big, plush blankets you wrap your stuff in when moving to save them from breaking, or scuffing are perfect to absorb noise going through the interior door.
  • Fiberglass panels – fiberglass panels that are a bit harder to work with but they block out noise and echoes to make your room quieter.
  • Green Glue – to seal cracks and gaps in the door, you will need some Green Glue solution.
  • Weatherstripping tape – weatherstripping tape can be used to seal gaps around the door.
  • Door sweeps – a door sweep is perfect for that gap at the bottom of the door.
  • Soundproof curtains – these can work in a similar manner to the moving blankets to block noise and insulate interior doors as well.

There are a few other materials you may need but not to worry, we’ve discussed all of these in the next section so keep reading.

How to soundproof an interior door


1. Install a soundproof door sweep

Ever wondered how to soundproof an interior door?

Let us start with the biggest most visible gap in the door.

That gap is the one at the bottom of the door that allows it to close properly without touching the floor and getting jammed.

While rubber door sweeps were made to prevent draft, dust, and bugs from entering your home, they can also act as a soundproof barrier.

Blocking the gap with a door sweep is better at leaving the gap open.

Rubber door sweeps will not affect the way the door closes since they are made from flexible materials and can be cut to size.

Just ensure that the door sweep is on the thicker side without compromising on flexibility.

You can choose the door sweep mentioned below or check out our best soundproof door sweeps post.

  • Made from flexible and adjustable silicone
  • Three-layer design to block noise
  • Easy to install

The Suptikes Door Draft Stopper is the perfect solution to sealing the gap at the bottom of your interior door.

It is made from heavy-duty, highly durable, flexible, and adjustable silicone material to provide a snug fit without affecting the way your door closes.

This door sweep measures 2″ W x 39″ L and is easy to install.

Measure your door and cut the door sweep to fit.

Clean the area of dust then peel the protective back and apply the door sweep to the door.

It’s that easy to block the gap at the bottom of the door to keep sounds, dust, and cold or hot air from coming in.

2. Use weatherstripping

The next step is blocking the gaps between the door and the door frame.

A soundproof weatherstripping door kit or just a roll of weatherstripping tape is the perfect solution for this.

Weatherstripping tape was made to use around exterior doors and windows to keep out the chill but they work great to keep sounds out too.

The self-adhesive rubber foam tape compresses as you close the door to create an airtight seal which means no air can pass and no sound waves as well.

Installation is easy and requires you to peel off the protective backing to apply it to the door frame.

You can install and then cut the excess so there is no need to measure and cut before which saves you time.

You can start by applying the tape at the top of the doorframe and cut the excess when you get to the bottom.

  • Made from silicone
  • Creates an airtight seal to block noise
  • Self-adhesive

This Kanzzy product is an all-in-one soundproofing door kit that includes weatherstripping tape and a door sweep.

This full get provides 360 degrees for a full door seal to give you some peace in your room.

Installation is easy as both the tape and door sweep feature self-adhesive backing.

Together, they both help to keep sounds, bugs, and dust out while helping you to save on heat and air conditioning.

If the space between your door and door frame is extremely wide, you may have to double up the tape to ensure an air-tight seal is formed to block sounds or try thicker rubber foam tapes.

Look for soundproofing rubber products that are thicker than weatherstripping tape like the one mentioned below.

  • Made from sponge rubber foam
  • Easy to apply
  • Durable

The Frost King Tape is made from an extra tough and durable rubber foam material.

The tape is 3/4″ W X 7/16″ H X 10′ L and is best suited to seal wide gaps that normal weatherstripping tape may be too thin to seal.

This unit has superior shock-absorbing properties and compresses slightly to seal around your door without damaging your door.

3. Caulk around the door frame

Now that we have covered up all visible gaps, it is time to cover up the tiny gaps and cracks that are not that visible.

If you can feel air still coming in from the door frame, there may be small cracks that need filling up.

This can be done using an acoustic caulk like Green Glue.

An acoustic caulk is your best bet since it is super flexible and will be able to withstand the natural shifting of the wall.

Regular caulk dries, hardens, and cracks over time so they aren’t a good solution as acoustic caulk.

To use any type of acoustic caulk, you’ll need a caulking gun to squeeze the product out and apply it without it coming into contact with your hands.

Remember to wear gloves also to prevent any contact.

If there are no visible cracks but you can feel air passing, aim for areas around the door frame.

Apply a small bead of the caulk and smooth it out with a bit of force so if any cracks are present, the caulk can be pushed in.

  • Water-based
  • No high odor
  • Paintable

Green Glue is a high-quality acoustical caulk that was formulated to stop sound leaks.

The product is made from water-based latex and is safe to use in homes around kids and animals.

It has no high odor and remains pliable to ensure it is always performing its function of stopping noise from leaking in.

This Green Glue sealant is white and you can paint it after 48 hours.

If the cracks are too troublesome to fill with caulk, you can opt for expanding foam.

Apply the foam to the gap or crack and watch as the foam expands until the crack or gap is completely filled.

Ensure to read all instructions and follow safety guidelines when using expanding foam.

Wear gloves since this product is meant to fill gaps in concrete and other hard surfaces so you definitely don’t want it on your hands.

Some expanding foam products may require you to wash the area before applying.

To apply, start at the deepest point of the crack and work toward the surface.

Remember to stop and shake the can from time to time as you’re applying.

  • Polyurethane-based
  • Forms a permanent seal
  • Sandable and paintable

To fill gaps more than 1 inch, use the Great Stuff Gap Filler.

This expanding foam product is polyurethane-based and works on a variety of different materials like wood, drywall, and others.

It is installed using the new quick stop straw technology to stop messy foam drips.

Great Stuff Gap Filler gets tacky after 6 minutes and can be trimmed after 30 minutes.

4. Use soundproof curtains to cover the door

After all gaps, visible and non-visible are filled and covered, it is time to create layers to block sound.

Since interior doors have a hollow core, adding layers will block and dampen sounds passing through.

Covering the door with soundproof curtains is one sure way of adding layers.

These units are usually made from thick polyester or a similar type of material featuring a triple weave design that helps to block sounds.

Ensure that the unit you choose completely covers the door and that you have a few inches of the curtain around it.

To install your soundproof curtain, you’ll need a curtain rod.

Attach the rod to the wall above the door and slide your curtain on through whether it’s a curtain that uses grommets or rod pockets.

Along with noise reduction properties, insulating interior doors with soundproof curtains can help keep your room warmer in the cold winter and cooler in the hot summer.

You should also use these on your windows to block sound, light and benefit from thermal insulation.

Soundproof curtains come in different sizes, colors, and patterns to match any decor. 

  • Triple weave fabric
  • Blackout effect
  • Thermal insulation

5. Attach a soundproof blanket over the door

A soundproof blanket or moving blanket works in a similar way as soundproofing curtains.

Soundproofing blankets tend to be made from a thicker and heavier material which means that they’ll be more effective when blocking out sounds.

The only downside is that a soundproof blanket will not look as nice as a soundproof curtain which can come in a plethora of colors and styles.

However, the end goal here is to block sounds from disturbing you and not so much about the looks but you can still make the soundproof blanket look presentable.

You can attach the soundproof blanket in such a way that it can be rolled up when you don’t need it or secure it to the sides.

If you don’t mind the look, you can permanently attach it to the door by nailing it in.

  • Thick virgin cotton batting with polyester binding
  • Durable
  • Multi-purpose

6. Use acoustic panels

Another way to add mass to your doors by using acoustic panels.

There are two types of acoustic panels, namely, foam and fiberglass.

They both work well and provide a great solution to block out sounds.

Foam panels work great at reducing echo and fiberglass panels work well in blocking noise.

Fiberglass panels cost a bit more but they are well worth the price since the block sounds better.

They look even better than foam panels and can greatly enhance the appearance of the room.

Fiberglass panels come in different designs and colors and can match your color scheme.

These panels reduce low-frequency noise and vibrating sounds.

They are also shockproof, moisture-proof, and work as thermal insulators as well.

Fiberglass panels are a bit harder to install and may take some time.

They are not self-adhesive but you can install them using Green Glue or command strips.

Both Green Glue or command strips will securely hold the panels in place but the only difference is when removing them.

It is easier to remove the panels that are attached by command strips than those attached by Green Glue. 

  • NRC value: 0.85
  • Flame retardant
  • Fairly easy to install

The BQLZR fiberglass panels are the best type of panels to use to block out noise effectively.

This particular product has a Noise Reduction Coefficient(NRC) rating of 0.85.

Along with soundproofing properties, these units help with thermal insulation as well.

7. Use a combination of methods

To shut out as much noise as possible, mix and match the various methods above to achieve the best results.

The more layers you add to the door, the better it will stop noise from reaching you.

Blocking all cracks and gaps will restrict airflow as well as sound waves from passing through.

8. Change the door

If you try all these methods and you still hear a lot of noise, then you may just have to change the door and go for a solid core door.

This is going to cost you a fair bit but when it’s all said and done, peace is priceless.

Another annoying issue with hollow-core doors is that they are always slamming shut.

If you have that problem, read here to solve it in this how to stop a door from slamming post.

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