The Role of Polystyrene Insulation in Soundproofing Your Home

Polystyrene Insulation

At some point, most homeowners find themselves in need of soundproofing their homes. Whether it’s to block out outside noise or to minimize noise transmission within the house, soundproofing can make a significant difference in the overall quality of life at home. There are several ways to soundproof a home, but one of the most effective methods is through the use of insulation. In this article, we will discuss the role of polystyrene insulation in soundproofing your home.

What is Polystyrene Insulation?

Polystyrene insulation is a type of rigid foam insulation that is made from polystyrene beads. The beads are heated and then expanded with steam to create a foam board that is used for insulation purposes. Polystyrene insulation is available in two types: expanded polystyrene (EPS) and extruded polystyrene (XPS).

EPS insulation is the most commonly used type of polystyrene insulation. It is a lightweight material that is easy to install and provides excellent insulation value. EPS insulation is made up of small beads that are fused together to create a foam board.

XPS insulation, on the other hand, is a more dense material that is used in applications where higher compressive strength is needed. It is often used in commercial construction and roofing applications.

How Does Polystyrene Insulation Help with Soundproofing?

Polystyrene insulation is an excellent soundproofing material because it has a high-density level that makes it an effective barrier against sound transmission. When sound waves hit the insulation, the foam board absorbs the sound waves and converts them into heat energy. This conversion of sound waves into heat energy reduces the amount of sound that is transmitted through the insulation, effectively reducing the level of noise that is heard in the room.

Polystyrene insulation is particularly effective in blocking out low-frequency sounds such as traffic noise, machinery noise, and low-frequency music. It is also effective in minimizing noise transmission within the house, such as the sound of footsteps or voices in adjacent rooms.

Installing Polystyrene Insulation for Soundproofing

Installing polystyrene insulation for soundproofing is a straightforward process. The insulation is cut to size and then installed between the wall studs or ceiling joists. The foam board is then covered with drywall or other finishing material.

When installing polystyrene insulation for soundproofing, it is essential to ensure that there are no gaps or spaces between the insulation and the walls or ceiling. Any gaps or spaces can allow sound waves to travel through the insulation, reducing its effectiveness as a sound barrier.

Benefits of Using Polystyrene Insulation for Soundproofing

There are several benefits to using polystyrene insulation for soundproofing your home. These benefits include:

  1. Excellent Soundproofing Properties – Polystyrene insulation is an effective soundproofing material that can significantly reduce the amount of noise that is transmitted through walls and ceilings.
  2. Easy to Install – Polystyrene insulation is easy to install and can be done by homeowners with some basic DIY skills.
  3. Lightweight – Polystyrene insulation is a lightweight material that is easy to handle and install.
  4. Durable – Polystyrene insulation is a durable material that is resistant to moisture, mold, and pests.
  5. Energy Efficient – Polystyrene insulation provides excellent thermal insulation, which can help reduce energy consumption and lower heating and cooling costs.


Polystyrene insulation is an excellent choice for soundproofing your home. It is an effective sound barrier that can significantly reduce the amount of noise that is transmitted through walls and ceilings.

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