Step-by-step: How to effectively soundproof your washing machine and dryer
Washing machines and dryers generate noise in two ways:
Firstly, through vibrations and structure-borne noise that spreads through floors and walls, and secondly, through airborne noise and resonance that builds up in the room and in cabinets/frames.
Therefore, a single measure is rarely enough if you want to see a clear improvement.
For best results, you need to dampen the sound in several stages – from the machine's contact with the floor to how the sound behaves in the room.
Follow the step-by-step guide below to achieve a quieter, more stable, and more comfortable laundry room.
Each step builds on the previous one, and together they create a comprehensive solution that reduces noise both in the laundry room and in the rest of the home.
Step 1: Identify which noise is most disturbing
Start the machines and listen for what dominates. Here it is important to distinguish between different types of noise, as this determines which measures will have the fastest effect.
– Vibration damping:
Thumping or powerful vibrations during spinning, structure-borne noise via the floor.
This is often the biggest disturbance, as vibrations can spread far in the structure and be heard in other rooms.
– Sound barrier and sound absorption:
Brumming/buzzing, motor and resonance noise. This noise is often amplified by cabinet frames, walls and hard materials in the room.
– Adjustment of location or vibration damping:
Rattling/clinking, loose panels, or contact with furnishings. These are often "small" noises that are perceived as particularly annoying because they are sharp and irregular.
By understanding the type of noise, you know where to start and avoid spending time on measures that do not match the problem.
Step 2: Ensure that the machines are completely stable
A machine that is even slightly out of level dramatically amplifies vibrations.
Even a slight imbalance can make the spin cycle noisier, increase the noise level, and spread the structure-borne noise further throughout the house.
Therefore, stable placement is the basis for all other noise reduction.
– Check that the washing machine and dryer are level in all directions.
– Adjust the feet until the machine is completely stable and does not rock when you press lightly on it.
– Make sure that the machines are not pressed against walls or cabinet sides, as this creates a direct sound bridge for vibrations.
This is often the most underestimated but most effective measure – and it also makes the subsequent steps work better.
Step 3: Dampen vibrations against the floor (most important of all)
Floors and joists are the main sound path in laundry rooms.
When vibrations go straight down into the floor, they spread throughout the building and can be heard as noise in adjacent rooms, on other floors, and sometimes throughout the entire building.
Therefore, you need to dampen the vibrations at the source – under the machine.
– Lay Polaric damping mat as a base to reduce the amount of vibration reaching the floor.
– Combine with Neosound insulation on top for extra absorption, stability, and better decoupling between the machine and the floor.
– In case of clear point vibrations, you can add Dampio vibration plates under the feet to reduce "impact" and hard contact points.
This stops structure-borne noise at the source and reduces noise in the rest of the house.
Many people find that this is where the biggest difference is made – both in terms of noise level and how stable the machine feels.
Step 4: Insulate against resonance in walls and furnishings
If the laundry room has hard surfaces such as tile, concrete, or plaster, sound is easily amplified.
In addition, cabinet frames and thin panels can start to vibrate and act as a "speaker," making the sound seem louder and more intrusive.
To reduce this, you need to both block the sound and remove the resonance that builds up in the structure.
Install an MLV sound barrier on thin surfaces, behind cabinets, and other places that allow sound to pass through. Also, install Polaric as the first layer where the structure vibrates.
– Add an absorbent layer of Egg - Sound Insulation so that the sound that is blocked does not bounce back and build up resonance inside the wall or cabinet system.
This blocks the sound and absorbs it at the same time, instead of it bouncing around in the structure.
The result is a laundry room where the machine noises feel softer and less "tinny."
Step 5: Seal gaps and penetrations
Small gaps act as sound leaks, especially around pipes, penetrations, and cabinet frames.
Sound always takes the easiest route, and even if you have dampened the vibrations, noise can still "escape" through small openings.
Seal joints and penetrations with Seal - Sealing strips that follow movements and do not create hard contact points.
– Check that no panels are loose and that hatches/frames close tightly.
A tight installation prevents sound from leaking unnecessarily and allows the rest of the soundproofing to have maximum effect.
Step 6: Reduce rattling and contact noise
Rattling often comes from the machine hitting the interior or something being loose.
This is a sound that is quickly perceived as particularly disturbing because it is sharp and irregular.
This can make the entire laundry room feel "messy" even if the background noise is not that loud.
Tighten braces, panels, and screws on machines and nearby fixtures.
– Check hoses and cables to ensure that they do not hit the wall or cabinet during operation.
– If the machine is close to a wall or cabinet: create a gap where contact is likely to occur to prevent vibrations from being transmitted directly.
This will eliminate those annoying, sharp noises that are otherwise amplified in the room and make the laundry room feel quieter and more stable.
Step 7: Soundproof the room if it echoes
In many laundry rooms, the noise is perceived as worse because of the echo.
Hard surfaces cause sound to bounce back and forth, creating a reverberation that makes the machine noise feel both louder and more intrusive.
– If you hear a clear reverberation: Install PESsound absorbers on the largest free surfaces.
Focus on surfaces close to the machines and on large flat surfaces where sound would otherwise be reflected directly back, such as the wall or ceiling.
This makes the machine noise seem softer and less aggressive, even if the machine itself is just as loud.
Step 8: Test, adjust, and fine-tune
Run a program and listen again. The difference is often noticeable immediately, but sometimes minor adjustments are required to achieve the final improvement.
– Have the vibrations decreased and does the machine feel more stable?
Has the resonance disappeared in cabinets or walls?
– Does the sound seem softer and less intrusive?
If any noise remains, add more locally where you can still hear the disturbance – often a little extra damping in the right place is enough to get rid of the last annoying sound.
Summary – how to achieve a quieter laundry room
The most effective sound dampening is achieved when you combine stable placement, heavy vibration dampening against the floor, and sound barriers and absorption in walls and cabinets.
When you break the sound path at every point, your washing machine and dryer will be noticeably quieter – both in the room and throughout the rest of your home.