Soundproof Interior Doors

Things To Know Before You Buy Soundproof Interior Doors

Music, video, or home appliances can disturb the neighbouring rooms most of the time. Sometimes there may be some people having a conversation in the living room or kitchen, but the sound transmission is such that another person cannot even sleep in the bedroom. 

There are numerous ways to reduce sound transmission in your interior spaces. The most common, most straightforward, yet consistently overlooked is getting a soundproof door. This can be the first step to achieving a quieter house. Here are a few things to consider before buying a soundproof door.

Know The Basics of Sound Transmission in The House

The sound within a house can sometimes be subjective and fraught with emotions. You need to develop an objective way to measure and understand the issue, and benchmarks are a perfect way. The Sound Transmission Class (STC) ratings can help you measure and know the acoustic performance of a wall, door, or any other household material. When the STC is higher, that indicates that a particular part of the house can better block sound.

Some of the standard STC ratings include: 

  • STC 25 – this means you can easily understand everyday speech.
  • STC 30 – this means you can understand a loud speech, but normal speech can be heard but not understood
  • STC 35 – a loud speed is audible but cannot be understood.
  • STC 41 – a loud speech can be heard only as a murmur.
  • STC 45 – a loud speech is inaudible
  • STC 50 – you cannot hear a loud musical instrument.

Know the STC Ratings for Doors and Walls

If your interior walls are a weak barrier against sound within your home, any wall penetration will only promote sound transmission. Doors are the weak link in sound transmission in a home, especially the hollow-core doors. Here are some STC ratings against the house elements:

  • STC 20 to 25 – almost all the indoor hollow-core doors. 
  • STC 30 – particleboard core or solid doors
  • STC 33 – a standard interior wall with 0.5-inch drywall on either side and 3.5-inch
  • STC 39 – interior walls with 3.5 inches of space with insulation and 0.5-inch drywall on both sides
  • STC 45 – a 3.5 inches space filled with insulation and 0.5-inch drywall on both sides
  • STC 55 to 60 – these are for solid wood doors

Doors – An Important Soundproofing Factor

The sound transmission in a house usually occurs because the walls’ ceilings and drywall are too thin. Please note that the interior doors take up a larger wall space than you might think they do. For instance, if a wall that adjoins the area where much noise is coming from is 80 square feet, the door takes up 20% of that area.

The door is usually the weak spot on a wall for sound transmission. This is more so when you use hollow core doors, the most standard doors in new constructions or most homes. However, as per the STC numbers above, you can easily improve any of your walls’ soundproofing by replacing a hollow-core door with a solid wood slab door. 

Replacing your standard door with a soundproof door from TOSTEM is an excellent way to reduce the sound transmission between different rooms. These doors are integrated with EPDM gaskets. These are primarily found in automobile doors and windows. EPDM gaskets play a crucial role in protecting space from noise intrusion. For instance, these doors and windows can reduce the sound by 25 dB with a single glass. You can increase the glass thickness to improve the sound insulation quality further. 

Replacing your standard doors with a soundproof door is an easy exercise. Keep the pointers outlined in this post and consult with a window consultant to make an informed decision. 

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