If you’ve ever stepped into a home sauna and been jolted by a door that slams too loud, a vent that rattles when the heater kicks on, or a neighboring family member knocking because the steam room is too loud, you know how much a lack of soundproofing can ruin the relaxation you’re there for. As a home sauna supplier, I work with hundreds of homeowners every month who fall in love with the idea of owning their own sauna—until they realize their current space or existing model isn’t as quiet as they thought. Soundproofing a sauna isn’t just a luxury for people who live in apartments or close quarters; it’s about preserving the calm, immersive experience that saunas are meant to deliver. After years of installing, troubleshooting, and refining sauna builds for customers across the country, I’ve learned that successful sauna soundproofing is less about guessing what works and more about matching solutions to the unique quirks of your space, your sauna type, and your noise concerns. Below, I’ll break down exactly how I walk customers through this process, step by step, with science-backed tips that actually deliver results. Home Sauna
First, it’s critical to understand what makes saunas different from other rooms in your home. Unlike a bedroom or a living room, a sauna operates at extremely high temperatures—typically between 150°F and 195°F for traditional saunas, and up to 120°F for infrared saunas—and has high levels of moisture in traditional models. That means any soundproofing material you use has to be heat-resistant, non-toxic, and able to hold up to consistent humidity; many standard soundproofing products will warp, off-gas, or even melt in sauna conditions, so that’s the first rule of thumb I share. I also tell customers to map their specific noise pain points first, because not all sound problems are the same. Do you hear outside noise (traffic, neighbors) seeping in? Is sound from the sauna (the heater fan, door slams, steam hissing) escaping to the rest of your home? Or is there echo or reverb inside the sauna itself that makes conversations or quiet relaxation hard? Mapping these issues early saves you from wasting money on solutions that don’t target your exact problem.
Let’s start with the most impactful area for soundproofing any sauna: the door. Sauna doors are the biggest weak spot for sound transfer, because they have to remain airtight to keep heat in, and gaps or flimsy panels let noise pass through easily. A lot of budget saunas come with thin, hollow doors that cost next to nothing but do almost nothing for soundproofing. The fix here is two-fold: first, upgrade to a solid, thick door made of wood or heat-rated composite (I recommend doors that are at least 1.75 inches thick; thicker is better, up to 2 inches for maximum impact). Solid wood doors, especially those made of cedar or basswood, are ideal because they’re dense enough to block sound and also resistant to the high temperatures and humidity of saunas. But even a solid door won’t work if it doesn’t seal properly. That’s where high-temperature door gaskets come in. Standard rubber gaskets will melt in a sauna, so you need to use closed-cell foam gaskets rated for use up to 200°F, designed specifically for sauna doors. These gaskets create an airtight seal when the door is closed, which not only locks in heat and moisture but also stops sound vibrations from passing through gaps. Another trick I share with customers who already have a solid door but still hear noise: add a secondary door. For saunas located near living spaces or shared walls, a second, slightly offset door creates a sound deadening air gap between the two doors, similar to how double-pane windows work. This setup is especially effective for infrared saunas, which produce a consistent, low hum from their heating elements that can carry through thin walls.
Next, wall and ceiling soundproofing, which is another key area. The walls of a home sauna need to be insulated to retain heat, so adding soundproofing insulation to that layer is a natural double win—no need for a separate insulation layer and soundproofing layer. But again, not all insulation works for saunas. Fiberglass insulation can off-gas when exposed to high heat, and mineral wool insulation is too dense and can hold moisture, leading to mold growth. Instead, I recommend using closed-cell polyisocyanurate insulation or aerogel insulation, both of which are heat-resistant, moisture-resistant, and have excellent sound blocking properties. For customers who already have a sauna installed and can’t rework the wall insulation, adding a layer of mass-loaded vinyl (MLV) over the interior wall panels is a great option. MLV is a thin, flexible, heavy material that blocks sound vibrations, and it’s rated for high temperatures up to 225°F, making it perfect for saunas. Just make sure to seal all the seams of the MLV with high-temperature silicone caulk to prevent sound leaks. For ceilings, many homeowners forget that sound travels upward, especially from the sauna’s heater unit. If your sauna heater is mounted on the ceiling, adding a layer of acoustic ceiling tiles rated for heat (not standard ceiling tiles, which will warp) or a layer of MLV above the ceiling panels will stop that low hum from spreading to upper floors of your home.
Then there are ventilation and heater components, which are often overlooked sources of noise. Saunas need ventilation to control moisture and air quality, but a poorly designed vent can create a constant hissing or whistling sound that’s impossible to relax around. If your sauna has an external vent, make sure it’s fitted with a sound attenuator— a small, pipe-shaped device lined with sound-absorbing material that traps sound waves before they exit the vent. The attenuator needs to be heat-resistant, so avoid plastic models; metal attenuators lined with mineral wool (sealed to prevent moisture damage) work best. For the sauna heater, electric heaters produce a low hum that can transfer through the wall or floor if the unit is not isolated. If your heater is mounted on a wall, install it on a vibration-damping pad made of heat-resistant rubber, which absorbs the vibrations from the heater and stops them from traveling through the wall structure. For floor-mounted heaters, use a raised wooden platform made of thick, solid planks to elevate the heater, adding a layer of MLV between the platform and the floor to block vibrations from seeping into the lower level.
Inside the sauna, echo and reverb can make the space feel loud, even if there’s no external noise. Traditional saunas lined with cedar panels have a smooth, hard surface that reflects sound, creating a hollow echo that amplifies even quiet sounds. Infrared saunas have similar issues with their smooth interior panels. The fix here is to add sound-absorbing surfaces that are still safe for sauna conditions. I recommend using heat-rated acoustic panels made from natural wood fibers, wool, or mineral wool, all of which are non-toxic, moisture-resistant, and designed to withstand temperatures up to 200°F. Unlike standard acoustic foam, which can melt or off-gas in saunas, these panels are made specifically for high-humidity, high-temperature spaces. Place the panels on the walls opposite the door, along the ceiling, and above the heater to break up sound waves and reduce echo. For customers on a budget, another option is to hang thick, heavy cotton curtains (treated with a water-repellent coating to resist steam) on the walls— they absorb sound and add a cozy, traditional feel that fits the sauna vibe.
Now, I want to address a common myth I hear all the time: “You can’t soundproof an existing sauna.” That’s not true, but it does require working with the space you have, rather than tearing everything out and starting over. For customers who have an old sauna that’s already built into a corner of their garage or near a shared wall, I walk them through incremental upgrades. First, swap out the door and gasket, which is the cheapest and most impactful fix. Then, add MLV to the interior walls (you can remove a small section of the paneling to tuck it behind, or even adhere it to the inside surface of the paneling if you don’t want to cut into the wood). Next, add a vent attenuator for the ventilation system. For infrared saunas, many customers don’t realize that the heating element’s hum is the main noise culprit— so upgrading to a quieter, insulated infrared heater can cut internal noise by up to 50%, with minimal installation work.
I also can’t skip over space-specific considerations. If your sauna is in an apartment, the rules change a little, because you’re dealing with shared walls and floors. For apartment saunas, I recommend a combination of the double door trick, wall insulation with closed-cell foam, and underlayment under the sauna floor made of MLV to block sound from traveling down to the unit below. For saunas in small bathrooms, where space is at a premium, compact sound-absorbing wall panels and a tight-sealing door are the best bets— you don’t have room for a double door, so maximizing seal is key.
As a home sauna supplier, my number one goal is to make sure every customer’s sauna is a retreat, not a source of stress. I’ve seen customers skip soundproofing, only to end up moving their sauna to a different part of the house or adding awkward sound-dampening solutions that ruin the look of their space. Taking the time to plan for soundproofing during the initial build, or even upgrading it after installation, is worth every penny for the long-term enjoyment of your sauna. If you’re considering adding a sauna to your home, or you already have one and are struggling with noise issues, my team and I can walk you through every step— from measuring your space to recommending the right materials, and coordinating installation to make sure your sauna is as quiet and relaxing as it should be.
If you’re ready to create a soundproof home sauna that fits your space and your needs, get in touch with our team to discuss your project. We offer customized solutions for new saunas and retrofits, with products rated for all sauna types and conditions. Don’t let noise ruin your sauna experience— reach out to learn more.
Infrared Sauna Shower References:
- ASHRAE. (2021). HVAC Applications Handbook: Sauna Ventilation and Thermal Design. American Society of Heating, Refrigerating and Air-Conditioning Engineers.
- Noise Control for Residential Spaces. (2020). National Institute of Building Sciences.
- Sauna Construction and Material Standards. (2019). International Sauna Association.
- Mass-Loaded Vinyl for Thermal and Acoustic Insulation. (2022). Journal of Building Physics.
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