Korean Apartment Soundproofing: How to Reduce Floor Noise (층간소음) Yourself
Floor noise between apartment units is one of the most charged household problems in Korea. Koreans call it 층간소음 (cheunggan soeum) — literally "between-floors noise." It causes thousands of neighbor disputes a year, and it has a body of national law, a government mediation center, and a whole shelf of products built around it.
Floor noise between apartment units is one of the most charged household problems in Korea. Koreans call it 층간소음 (cheunggan soeum) — literally "between-floors noise." It causes thousands of neighbor disputes a year, and it has a body of national law, a government mediation center, and a whole shelf of products built around it.
This guide translates what Korean homeowners and renters actually do about it: the mats they buy, the underlay they install, and the small, rental-safe fixes that calm a downstairs neighbor before a complaint ever happens. We pull the numbers straight from Korean government tests, the national noise law, and Korean interior platforms like Ohouse (오늘의집). Where a number isn't backed by a real source, we leave it out.
Quick Answer
- A mat helps, but less than you'd hope. Korea's Consumer Agency tested 8 floor-noise mats in 2025 and found heavy-impact noise (walking, jumping) dropped only about 1–2 dB(A) — light-impact noise like dropped objects falls more.
- Thicker or double-stacked mats barely add anything. Korean media tests show stacking layers does little, because low-frequency "heavy" noise travels as vibration through the concrete slab, not through the air.
- Renters: stick to peel-and-stick fixes. Felt pads under furniture legs, noise-blocking slippers, a thick rug with a felt underlay, and EVA mats — none of these touch the structure, so your deposit is safe.
- Korea's legal floor-noise limit is 39 dB daytime / 34 dB nighttime for direct-impact noise (강화 기준, in force since Jan 2, 2023). The free 이웃사이센터 (1661-2642) will mediate and measure.
Disclosure: This article may contain affiliate links. We only recommend products and sources we have verified. Brand and price details come from official Korean sources cited inline. Always confirm current pricing and specs on the seller's page before buying.
What Exactly Is 층간소음 (Cheunggan Soeum)?
층간소음 is noise that travels between apartment floors. In a country where most people live in concrete-slab apartments (아파트) and officetels, the floor of your home is the ceiling of someone else's. Sound moves easily through that shared concrete.
Korean law and acoustics split it into two kinds. The split matters, because the fix is different for each.
| Noise type | Korean term | Real-life example | Frequency | How easy to block |
|---|---|---|---|---|
| Light-impact noise | 경량충격음 | Dropped spoon, dragged chair, falling toy | High | Easier — a mat helps a lot |
| Heavy-impact noise | 중량충격음 | Walking on heels, a child jumping or running | Low | Hard — travels as vibration through the slab |
| Airborne noise | 공기전달소음 | TV, music, loud talking | Mixed | Separate problem (walls, not floor) |
The hard truth: the complaints that escalate into disputes are almost always heavy-impact — footsteps and jumping. And that's the kind a DIY mat barely touches. According to a 2024 report citing KAIST researchers, low-frequency heavy-impact sound moves through the concrete structure itself, so "just laying down cushioning won't reduce the noise" unless the material's composition, thickness, and bonding are engineered together (Unicorn Factory, 2024).
Knowing this saves you money. You stop chasing a mat that "blocks everything" — there isn't one — and you focus on the layered approach that actually moves the needle.
How Much Noise Does a Mat Actually Block?
This is the question everyone gets wrong. So let's use real test data, not marketing.
In December 2025, the Korea Consumer Agency (한국소비자원) published a formal comparison test of 8 floor-noise reduction children's mats (4 cm thick, folder-type) and measured how much each cut impact noise (Consumer24, 2025). Here's what they found.
| What they measured | Result | What it means |
|---|---|---|
| Heavy-impact noise (2.5 kg rubber ball, 1 m drop) | Dropped about 1–2 dB(A) | Walking and jumping noise barely improves |
| Noise reduction across products | "Similar level" across all 8 | The expensive mat isn't quieter than the cheap one |
| Folder-type vs roll/puzzle | Folder-type performed best | Shape matters more than you'd think |
| Durability (cover + filler) | Big differences between products | This is where price actually buys you something |
The takeaway from Korea's own consumer testing body: buy a mat for the light-impact noise and the durability, not for a miracle on footsteps. Coverage in Kyunghyang Shinmun summed it up plainly — "noise-reduction effect is similar; check durability instead" (Kyunghyang, 2025).
Separate Korean media testing has put light-impact reduction higher — on the order of 16–17 dB(A) for dropped-object type sounds versus only a few dB for heavy-impact (SBS News, 2024). That gap — big help on light noise, small help on heavy noise — is the single most important thing to understand before you spend money.
Does Stacking Mats or Going Thicker Help?
Short answer: barely. And this surprises almost everyone.
Korean broadcaster SBS ran a test laying mats in 2 and 4 layers and found the noise numbers came out about the same as a single layer (SBS News, 2024). The Consumer Agency's 2025 test pointed the same direction: the 4 cm folder mat reduced heavy-impact noise only slightly more than thinner 2–2.5 cm mats.
Here's why. Heavy-impact noise is mostly low-frequency vibration. That vibration travels through the floor slab and walls, not through the cushion on top. Piling on more foam blocks the air path you've already mostly handled, while doing little about the structure path that's actually carrying the footstep noise.
So the smarter play isn't "thicker." It's "layered and combined":
- Base sheet (전지) on the bare floor
- Non-woven fabric (부직포) over the base sheet
- High-density EVA mat on top
That three-layer order is the standard install Korean parents use, and it gives you a clean, stable surface with the cushioning that does help on light-impact sound (SBS News, 2024). For deeper material context, see our Korean flooring materials guide, which breaks down what's under your feet in a Korean apartment.
What's the Legal Floor-Noise Standard in Korea?
Korea is one of the few countries with a national, numeric floor-noise standard written into law. If you've ever wondered whether your neighbor's noise "counts," there's an actual threshold.
The rule is the 공동주택 층간소음의 범위와 기준에 관한 규칙 (Rule on the Scope and Standards of Apartment Floor Noise), a joint Ministry of Environment / Ministry of Land regulation. The thresholds were tightened by 4 dB and took effect January 2, 2023 (Korea Law Information Center, law.go.kr).
| Noise type | Measurement | Daytime (06:00–22:00) | Nighttime (22:00–06:00) |
|---|---|---|---|
| Direct-impact (1-min equivalent, Leq) | 1-minute average | 39 dB | 34 dB |
| Direct-impact (max, Lmax) | Peak | 57 dB | 52 dB |
| Airborne (5-min equivalent, Leq) | 5-minute average | 45 dB | 40 dB |
The old direct-impact limits were 43 dB day / 38 dB night, so the 2023 change made the standard stricter by 4 dB each (Seoul Economic Daily, 2023). Older buildings (approved before mid-2005) get a transitional add-on — a few dB added to the table above during a phase-in period (law.go.kr).
Why this matters for a DIY fix: if you're the one being blamed, getting under these numbers is your goal — and a mat plus rugs plus slippers can be enough to keep a normal household below the complaint line. If you're the one suffering, these numbers are what an official measurement checks against.
Who Do You Call? The Free Government Mediation Service
Before any dispute turns ugly, Korea gives you a free, neutral middleman. It's run by the Korea Environment Corporation (한국환경공단) under the Ministry of Environment, and it's called the 층간소음 이웃사이센터 (Floor Noise Neighbor Center).
| Service | Detail |
|---|---|
| Phone | 1661-2642, weekdays 09:00–18:00 |
| Online request | National Noise Information System (noiseinfo.or.kr) |
| What you get | Phone counseling, an on-site visit, and noise measurement |
| Cost | Free |
You file a request online or by phone, and center staff can visit, mediate between neighbors, and measure the actual decibel level against the legal standard (floor.noiseinfo.or.kr). It's the calm, paper-trail path — and Korean tenants are often told to use it before confronting a neighbor, because direct retaliation (like banging the ceiling back) can get you in legal trouble instead.
This service is the reason a DIY approach is so worthwhile. A reasonable, good-faith effort — visible mats, slippers, a polite note — plus the center's mediation usually resolves things without lawyers.
What Are the Best Rental-Safe DIY Fixes?
If you rent — and especially if you're in a 전세 (jeonse) or 월세 (wolse) lease — your fixes have to be reversible. Nothing glued to the structure, nothing that scars the floor. Good news: the most effective everyday fixes are all rental-safe.
Here's the priority order, cheapest and easiest first.
1. Felt pads under every furniture leg
The dragged-chair screech is pure light-impact noise — the kind cushioning crushes best. Self-adhesive felt pads (펠트 패드) peel and stick to chair and table legs in minutes and peel off clean when you move out. This is the single highest return-per-won fix in the whole list.
2. Noise-blocking indoor slippers
Heel strikes are a top heavy-impact complaint. Soft EVA or cushioned noise-reduction slippers (층간소음 방지 슬리퍼) absorb the strike at the source — your foot — before it reaches the slab. Korean furniture retailer Hanssem sells cushioned indoor slippers marketed specifically for living-room and floor-noise use (Hanssem Store). Cheap, instant, zero install.
3. A thick rug with a felt underlay
A wool or thick-pile rug (러그) over a felt rug pad does double duty: it muffles light-impact sound and adds a cushion layer underfoot. On Ohouse (오늘의집), rugs and floor mats are a top-searched 층간소음 category for exactly this reason. Pair the rug with a felt underlay rather than a thin anti-slip mesh — the felt is what adds the acoustic mass.
4. EVA mats in high-traffic and play zones
For families with kids, a 4 cm folder-type EVA mat in the play area is the workhorse. Korea's Consumer Agency found folder-type performed best of the shapes tested (Consumer24, 2025). Established Korean mat brands include Parklon (파크론), a long-running mat specialist (parklonmall.com), and Soriana (소리안나), which makes EVA floor-noise mats (soriana.co.kr).
For a full walkthrough of deposit-safe projects, see our guide to Korean rental-friendly DIY projects that won't lose deposits and the broader Korean rental apartment interior rules.
Rental-safe vs structural — a quick map
| Fix | Rental-safe? | Best for | Effort |
|---|---|---|---|
| Felt pads on furniture legs | Yes | Light-impact (chairs) | 10 min |
| Noise-reduction slippers | Yes | Heavy-impact (footsteps) | None |
| Rug + felt underlay | Yes | Light-impact + comfort | 30 min |
| EVA folder mat (4 cm) | Yes | Play areas, light-impact | 30 min |
| 3-layer mat install (전지 + 부직포 + EVA) | Yes | Whole-room light-impact | 1–2 hr |
| Floating-floor acoustic underlay (차음재) | No — structural | Heavy-impact (true fix) | Hire a pro / owner only |
The bottom row is the only thing that meaningfully attacks heavy-impact noise — and it's a construction job under the finished floor, not a renter's project. That's the honest ceiling on what DIY can do.
How Do You Combine Fixes for the Best Result?
No single product wins. The households that actually quiet down stack the easy fixes so each one covers a different gap. Think of it as a layered defense.
The combined plan most Korean families use:
- Slippers on, always. Stops heel strikes at the source — the cheapest heavy-impact win available.
- Felt pads on every chair, table, and stool leg. Kills the dragging screech.
- EVA mat or rug in the play and walking zones. Soaks up light-impact and dropped-object noise.
- Felt underlay beneath rugs for extra mass.
- House rules at night — no running or jumping after the 22:00 nighttime threshold kicks in, since the legal limit drops to 34 dB then.
- A short, polite note to the downstairs neighbor showing you've made an effort. In Korea this gesture defuses a huge share of disputes before they start.
This combination won't make a concrete slab disappear. But it reliably pulls a normal household's footprint down toward the legal line, and — just as important — it shows good faith if the 이웃사이센터 ever gets involved.
For more on living gracefully within Korea's apartment norms, our overview of Korean apartment culture: jeonse, move-in traditions, and interior covers the etiquette side, and the LH and SH public housing self-interior rules guide explains what you can and can't change in government housing.
Are EVA Mats Safe? The Phthalate Question
One caution before you buy a stack of cheap mats. There's a real safety issue Korean media and researchers have flagged, and it deserves a straight answer.
Some low-grade EVA and PVC mats can release phthalate plasticizers — chemicals used to soften plastic that are studied as endocrine disruptors. A peer-reviewed study of children's products purchased in Korea found plasticizers above detection limits in a large share of products tested, with DEHP and DINP the most common (Int J Environ Res Public Health, 2020 — PMID 33227952). Korean reporting has separately warned that worn, older mats with damaged surface coatings can show elevated plasticizer levels.
How to buy safely:
- Choose mats certified for children's products (KC safety certification in Korea) and check for phthalate-free or low-VOC labeling.
- Replace worn mats. Once the surface coating is scratched or peeling, retire it rather than keep using it.
- Air out new mats. The Consumer Agency's 2025 test found one product exceeded the safety limit for a volatile organic compound, so ventilation after install matters (Consumer24, 2025).
Health note: This section summarizes published research and government testing for general information only. It is not medical advice. The cited 2020 study (PMID 33227952) examined plasticizer migration in children's products; it does not test any specific brand named here. If you have specific health concerns, consult a qualified professional and check current KC certification on the product you're buying.
Where Koreans Shop and Get Ideas
If you want to see real Korean homes solving this, two platforms dominate.
Ohouse (오늘의집 / ohou.se) is Korea's biggest interior inspiration and shopping platform. Users post their actual apartments, tag the exact mats and rugs they used, and you can buy the same products. Floor-noise mats are a perennial top category there. Our explainer on how Ohouse became Korea's interior inspiration hub covers how to navigate it.
Brand and retailer pages worth knowing:
| Source | What it is | Link |
|---|---|---|
| Parklon (파크론) | Long-running Korean mat specialist | parklonmall.com |
| Soriana (소리안나) | EVA floor-noise mat maker | soriana.co.kr |
| Hanssem | Furniture retailer with noise-reduction slippers | store.hanssem.com |
| Danawa | Price-comparison search for floor-noise mats | search.danawa.com |
Use Danawa to compare current prices across sellers, and use Ohouse to see how the product looks installed in a real Korean apartment before you commit.
Frequently Asked Questions
How much noise can a floor mat actually reduce in a Korean apartment? For light-impact noise (dropped objects, dragged chairs), Korean media testing has measured reductions on the order of 16–17 dB(A). For heavy-impact noise (walking, jumping), Korea's Consumer Agency measured only about 1–2 dB(A) in its 2025 test of 8 mats. So a mat helps a lot with high-pitched, sharp sounds but very little with footsteps.
Does stacking two mats or buying a thicker one block more sound? Not meaningfully. SBS News tested 2 and 4 layers and got results similar to a single layer, and the Consumer Agency found a 4 cm mat only slightly outperformed 2–2.5 cm mats on heavy-impact noise. Heavy-impact noise is low-frequency vibration that travels through the concrete slab, which extra foam on top can't stop.
What is Korea's legal limit for floor noise? Since January 2, 2023, the direct-impact standard is 39 dB during the day (06:00–22:00) and 34 dB at night (22:00–06:00), measured as a 1-minute equivalent level. Airborne noise limits are 45 dB day and 40 dB night over 5 minutes. These are set by a joint Ministry of Environment / Ministry of Land rule.
What can I do as a renter without losing my deposit? Stick to non-structural fixes: self-adhesive felt pads under furniture legs, cushioned noise-reduction slippers, a thick rug over a felt underlay, and EVA folder mats in high-traffic zones. None of these attach to the building structure, so they peel up clean at move-out. True structural underlay (차음재) under the floor is an owner-level renovation, not a renter project.
Who do I contact about a floor-noise dispute in Korea? Call the free 층간소음 이웃사이센터 (Floor Noise Neighbor Center) at 1661-2642 on weekdays 09:00–18:00, or file online at the National Noise Information System (noiseinfo.or.kr). Run by the Korea Environment Corporation, it offers counseling, on-site mediation, and official noise measurement against the legal standard. Use it before confronting a neighbor directly — retaliation can get you in legal trouble.
Related Reading
- Korean Rental-Friendly DIY Projects That Won't Lose Deposits
- Korean Rental Apartment Interior Guidelines
- Korean Flooring Materials Guide: Jangpan, Maru, and Tile Specs
- How Ohouse Became Korea's Interior Inspiration Hub
- Korean Apartment Culture: Jeonse, Move-In Traditions, and Interior
Sources: Korea Law Information Center (law.go.kr, 2023), Korea Consumer Agency / Consumer24 (2025), Floor Noise Neighbor Center & National Noise Information System (noiseinfo.or.kr), Kyunghyang Shinmun (2025), SBS News (2024), Seoul Economic Daily (2023), Unicorn Factory (2024), and Int J Environ Res Public Health (2020, PMID 33227952). Product details from Parklon, Soriana, and Hanssem official pages. All links verified live at publication.
-- The Self Interior Team