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Dishwasher Sound Insulation: Complete Soundproofing Guide

Silent Home Hub Dishwasher Sound Insulation

Your home should be a place for peace and relaxation.

Instead, you’re distracted by the noise from neighbors, the whirring from your washing machine, or a noisy dishwasher.

In many cases, your dishwasher is the real culprit behind the noise. This is especially true if you have a full load of dishes.

That’s why dishwasher insulation is key to make your home nice and quiet.

In this article, we’ve listed EASY-TO-FOLLOW steps to soundproof a noisy dishwasher. Let’s get started!

Table of Contents

How Can I Soundproof My Dishwasher?

There are 3 easy ways to soundproof a dishwasher.

It’s best to tackle it from the front, middle, or back.

  1. Front: Use a soundproofing material
  2. Middle: Replace your dishwasher insulation blanket
  3. Back: Attach soundproof matting

Read the steps below to find out how!

Use a Soundproofing Material

Materials you’ll need to soundproof a dishwasher:

  • Screwdriver
  • Tape measure
  • Utility knife or cutter
  • Soundproofing material of your choice

1. Unplug the Dishwasher From the Power Source

For safety reasons, step 1 would be to turn off your dishwasher’s water source.

Then, make sure to turn off the power supply.

2. Remove the Front Panel

For this step, prepare your screwdriver. Depending on your dishwasher, you might need a Torx or Phillips Head screwdriver.

Open the dishwasher door. Use the screwdriver to remove the screws along the inside of the door panel. Before you remove the screws, make sure you know where to set them aside so you won’t lose them.

Afterward, close the door carefully. Then, remove the front panel.

3. Measure the Front Panel

Get your tape measurement for this step. Measure the length, width, and depth of the front panel.

Take note of the measurements so you’ll have an idea of what size to get for your soundproofing material.

It’s very likely your soundproofing material won’t be a perfect size. Get something close to your measurements so you’ll have a lesser workload later on.

Pro tip: Focus on the depth. You can easily cut down on the width and length, but the depth will be much more difficult.

4.  Insert the Soundproofing Material

Buy the material of your choice using the measurements taken in Step 3. You could use a sound-absorbing panel or sheet or some anti-vibration pads.

You’ll probably need to cut the material to make it fit your panel. Use a utility knife or cutter to trim it down.

An electric carving knife will make your job easier, in case you own one.

But keep in mind that it’s a bit different from a regular knife; you don’t have to force the blade.

Once it’s the right size, attach the insulation material to the front panel.

5. Place Back the Front Panel

After you’ve attached the soundproofing material, install the front panel back into the dishwasher.

Make sure the screws are tight and secure.

Replace Your Dishwasher Sound Insulation Blanket

Materials you’ll need to soundproof your dishwasher:

  • New dishwasher insulation blanket
  • Pin or needle plier

1. Unplug and Detach All Lines

Like the first option, you’ll have to unplug your dishwasher from its power source for safety purposes.

Then, disconnect all the water lines from the dishwasher.

Pull the dishwasher out from the cabinet. You can use the dishwasher door to pull it out.

Drag it out until you see the whole length of the insulation blanket.

2. Remove the Old Dishwasher Insulation Blanket

Your dishwasher is most likely equipped with an insulating blanket.

This dishwasher insulation blanket goes on top of the dishwasher and over the sides.

If you’ve had your dishwasher for a while, chances are this dishwasher insulation blanket isn’t effective anymore.

Or even if it’s new, you could always upgrade it to lessen the noise.

You’ll notice that the insulation blanket is attached to the dishwasher with some rivets. To remove the dishwasher insulation blanket, use a pin or needle plier.

Discard the old insulating blanket.

3. Attach a New Insulation Blanket

Get a new insulating blanket. Most dishwasher manufacturers use fiberglass to insulate the machine.

Attach the new insulation blanket to the rivets.

For this step, you won’t need any tools. Simply push the blanket into the rivets, and it’ll fasten onto the frame.

4. Place the Dishwasher Back

Once you’re done, push the dishwasher under the cabinet onto its original place.

Re-attach all water lines.

Ensure all plugs are connected properly, and then plug the power source back on.

Attach Soundproof Matting

Materials you’ll need to soundproof a dishwasher:

  • Household adhesive
  • Soundproof mats (or mass loaded vinyl)
  • Tape measure
  • Scissors or utility knife

1. Unplug and Detach All Lines

As always, for safety reasons, make sure to unplug the power source from your dishwasher before starting.

For this one, you’ll also have to disconnect all water lines too.

Carefully pull the dishwasher out of the cabinet. This time, you’ll need to pull it all the way out so it’s away from the wall.

The idea is to soundproof the back of the dishwasher.

Why? Your dishwasher shakes and vibrates while in operation. This can cause noise when the back of the dishwasher hits the wall behind it.

2. Attach Soundproofing Matting

Using scissors or a utility knife, cut the soundproof matting into smaller strips.

If you prefer, you could also use mass-loaded vinyl. Similarly, cut it into smaller strips.

The idea is to cover the edges of the dishwasher. Cut strips that match the vertical and horizontal length of your dishwasher.

The ideal size of each strip is about 1-2 inches wide. For this step, use a tape measure to make it easier.

Attach these strips to the back of your dishwasher. Use a strong household adhesive to do so to ensure they’ll stay in place.

2.5 Bonus: Put Foam Mats Under the Dishwasher

Want to make sure your dishwasher is super quiet? Follow this bonus tip.

If not, jump straight to Step 3.

All you need is a foam mat for this one. Since your dishwasher is already facing away from the wall, you won’t have to go through all the steps again.

Foam mats are similar to anti-vibration pads in a way that they absorb the noise coming from your dishwasher.

Alternatively, you could also use any other insulating material. This includes a soundproofing blanket or rug.

Just keep in mind to leave ample space for your dishwasher.

3. Place the Dishwasher Back Into the Cabinet

Once you’re done, slide and place the dishwasher back under the cabinet.

Re-attach all the water lines. Make sure all hoses are properly connected. Afterward, plug the power supply back on.

Why Is My Dishwasher Loud?

A dishwasher normally makes noise because of the water rushing through the valve OR the slight humming when it’s operating.

But if it’s unusually loud, it’s time to worry AND INSPECT.

  • If you hear a grinding noise, there might be some chunks of food or dirt stuck in the chopper blade.
  • If your wash pump and drain pump are the noisy parts, it might need some repairs.
  • Last but not least, the dishwasher might not be properly secured causing it to bump on the sides of the cabinet while it’s operating.

What to Do if Your Dishwasher Is Still Noisy

Man and woman fixing a dishwasher

After following any of our tips above, your dishwasher should be ready to start again. But this time, with less noise!

But what if your washer is still making a rattling or grinding noise?

It might be a sign of something more serious. Consult your washer manual (if you still have it), or read the top 3 reasons below.

Broken Bearings or Loose Seals

The bearings and seals found in your dishwasher are usually made of plastic.

So it could easily get loose or break. This is usually the case if you hear a rattling noise from your dishwasher.

The good news is that it’s easy to replace the parts. You could use websites such as PartSelect to purchase replacements.

Consult a technician if you’re unsure which one to buy.

Malfunctioning Pump

The pump is one of the most important parts of your dishwasher. It’s responsible for forcing water into the spray arms and directing the water towards the drain hose.

The pump has a filter on it, so check for any foreign substances there. Food waste or dirt from the dishes could clog the pump, causing strange noises.

Similar to the bearings and seals, it’s easy to fix this on your own. Clean the pump and make sure there is no debris.

Or you could also replace the pump.

Before you do so, check out websites such as HomeAdvisor to see how much a repair will cost. This will also help you decide if it’s better to repair or just buy a new dishwasher for your house.

Broken Spray Arms

Your dishwasher’s spray arms are connected to the pump. They’re responsible for directing the water source onto the dishes to get rid of food waste and dirt.

If they’re broken or worn out, the spray arms won’t be able to rotate properly and will create noise while it’s running.

Similarly, you could opt to replace these.

Spray arms are cheaper than a pump (around $75 to $150), but it’s still worth checking how much it will cost.

Final Thoughts

Woman using a dishwasher

Soundproofing your dishwasher can be done in 3 easy ways—without the hefty price tag.

With these easy-to-follow steps, you can finally have some peace and quiet in your home.

Which one was your favorite? Do you have some tips that you use for your home?

Whichever method you go for, we hope we helped solve your noise problems!

If you think it’s time to replace your dishwasher, here are our recommendations for the Best & Quietest Dishwashers.


Changelog:

July 12, 2021 – removed 2 external links, removed 1 affiliate link

June 30, 2021 added changelog, fixed and updated article formatting and content

About the Author

andrea_adams

Andrea has always been bombarded by the hustle and bustle outside her home. Living in the city doesn’t get any quieter. The never ending noise from construction, traffic, and dogs barking on the streets day in and day out drove Andrea to a breaking point.

For 3 years, Andrea committed herself to studying DIY hacks, performing soundproofing experiments, and installing noise-free solutions. Now, she lives a quiet life free of the stress from noisy environments.

She hopes to share this knowledge so that others don’t have to endure the noise reigning in their ears and live a peaceful, stress-free life.