Compared with detached houses, apartment living makes it easier for neighbors' daily noise and footsteps to develop into disputes. To choose a property with strong sound insulation, it is important to assess three points carefully: the structure, the layout, and the floor level.
What is the noise level of everyday sounds? Start by understanding the benchmarks
Sound level is measured in dB (decibels). As a general guide, noise of 50 dB or less is considered suitable for comfortable daily living, and 40 dB or less is preferable during sleep.
| Everyday sound | Noise level |
|---|---|
| Air conditioner | Approx. 41-59 dB |
| Children running | Approx. 50-66 dB |
| Television | Approx. 57-72 dB |
| Vacuum cleaner | Approx. 60-76 dB |
| Piano | Approx. 80-90 dB |
Why does sound leakage happen in apartment buildings?
There are two main causes of sound leakage. When airborne noise (such as voices and television, which travels through air vibration) combines with structure-borne noise (such as footsteps and doors opening or closing, which vibrates the building structure), it creates the kinds of issues commonly seen in multifamily housing.
What is the difference between soundproofing, sound blocking, and sound absorption?
"Soundproofing" is a broad concept, while the practical measures are sound blocking (blocking sound) and sound absorption (absorbing sound). Effective soundproofing is based on blocking sound first, then improving performance by combining it with absorption. Concrete and gypsum are used as sound-blocking materials, while glass wool and urethane foam are used as sound-absorbing materials.
How can you identify an apartment with strong sound insulation?
Structure: Choose reinforced concrete construction
In terms of sound insulation, the ranking by structure is reinforced concrete (RC) ＞ heavyweight steel frame ＞ lightweight steel frame ＝ wood frame. RC buildings are highly effective at blocking everyday noise because concrete is used in the walls and floors, although rents tend to be higher. There is not a major difference in sound insulation between lightweight steel frame and wood construction.
Condominium units generally offer better sound insulation than standard rentals
Condominium buildings are often designed for long-term occupancy with greater attention to sound insulation, so they generally perform better than standard rental properties. If you want stronger sound insulation in a rental, choosing a condominium rental unit is a practical option.
Floor level: Choose based on your priorities
- If noise from the unit above concerns you → choose the top floor
- If you do not want your footsteps to disturb the resident below → choose the first floor
Layout: Storage space helps buffer sound
Layouts with a closet or storage space between your room and the neighboring unit are less likely to transmit everyday noise. If there is storage space between wet areas and living space, plumbing and drainage sounds are also less likely to be disruptive.
If you want to evaluate sound insulation more carefully when choosing a property, see also this guide to choosing a rental property management company.
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Frequently Asked Questions (FAQ)
Q1. Is sound insulation perfect in an RC building?
RC buildings provide better sound insulation than other structures, but they are not perfect. Actual sound-blocking performance also depends on wall thickness and construction quality.
Q2. Is there a way to check sound insulation during a viewing?
One approach is to tap lightly on the wall shared with the neighboring unit and see whether the sound resonates. Visiting at different times of day also makes it easier to understand the actual noise environment.
Q3. How is a condominium rental unit different from a standard rental apartment?
It is a condominium unit offered for rent by its owner. Because it retains the equipment and structural specifications of a condominium property, it often provides better sound insulation and higher-quality facilities.
Q4. How can you reduce footsteps from the floor above?
After moving in, installing soundproof mats or sound-dampening carpet can help. For a fundamental solution, living on the top floor is the most effective option.
