Exploring the Common Thicknesses of Cross Laminated Timber for Sound Insulation

When it comes to sound insulation, there are various materials and techniques that can be used to reduce noise transmission between rooms or buildings. One such material that has gained popularity in recent years is cross laminated timber, also known as CLT. This engineered wood product is not only environmentally friendly, but it also offers excellent sound insulation properties.

What is Cross Laminated Timber?

Cross laminated timber is a type of engineered wood product that is made by stacking layers of wood panels at right angles and bonding them together with adhesives. This creates a strong and stable panel that can be used for various construction purposes, including sound insulation. CLT is made from softwood species such as spruce, pine, or fir, which are known for their strength and durability.

The panels can vary in thickness, depending on the intended use and the level of sound insulation required.

The Importance of Sound Insulation

Noise pollution is a growing concern in urban areas, with more and more people living in close proximity to each other. This has led to an increased demand for effective sound insulation materials and techniques. Sound insulation not only improves the quality of life for individuals by reducing noise levels, but it also has a significant impact on the overall energy efficiency of a building. When it comes to sound insulation, there are two main types: airborne sound insulation and impact sound insulation. Airborne sound insulation refers to the reduction of noise transmitted through the air, such as voices or music.

Impact sound insulation, on the other hand, refers to the reduction of noise transmitted through vibrations, such as footsteps or moving furniture.

The Role of Cross Laminated Timber in Sound Insulation

As mentioned earlier, CLT is an excellent material for sound insulation. Its unique construction, with layers of wood panels bonded together, creates a dense and solid panel that effectively blocks sound transmission. The panels also have a high mass, which helps to absorb and dampen sound waves. Another advantage of CLT is its ability to reduce both airborne and impact noise. This makes it a versatile material that can be used in various applications, from residential buildings to commercial spaces.

The Common Thicknesses of Cross Laminated Timber for Sound Insulation

The thickness of CLT panels used for sound insulation can vary depending on the specific requirements of a project.

However, there are some common thicknesses that are typically used for this purpose.


- This is the thinnest CLT panel available and is suitable for low-level sound insulation requirements. It is commonly used in residential buildings where there is minimal noise transmission between rooms.


- This thickness is suitable for medium-level sound insulation requirements and is commonly used in multi-story buildings or commercial spaces where there may be more noise transmission between floors.


- This is the most commonly used thickness for CLT panels in sound insulation applications. It offers a good balance between cost and performance and is suitable for a wide range of projects, from residential to commercial.


- For projects that require higher levels of sound insulation, 120mm CLT panels are often used. These thicker panels are suitable for buildings located in noisy areas or where there are strict noise regulations.


- This is the thickest CLT panel available and is used for projects that require the highest level of sound insulation.

It is commonly used in buildings such as schools, hospitals, or recording studios.

Factors to Consider When Choosing the Thickness of CLT Panels for Sound Insulation

When deciding on the thickness of CLT panels for sound insulation, there are a few factors that need to be taken into consideration:
  • The level of sound insulation required - This will depend on the location and purpose of the building.
  • The type of noise - Different types of noise require different levels of sound insulation. For example, a building located near a busy road will require a higher level of sound insulation than a building in a quiet residential area.
  • The building's construction - The type of construction and materials used in a building can also affect the level of sound insulation required.
  • The budget - Thicker CLT panels may offer better sound insulation, but they also come at a higher cost. It is essential to find a balance between performance and budget.

In Conclusion

Cross laminated timber is an excellent material for sound insulation, offering both environmental and acoustic benefits. The thickness of CLT panels used for this purpose can vary depending on the specific requirements of a project, but common thicknesses range from 60mm to 160mm.

When choosing the thickness, it is essential to consider factors such as the level of sound insulation required, the type of noise, and the budget. With its versatility and effectiveness, CLT is undoubtedly a top choice for sound insulation in modern construction projects.

Samuel James
Samuel James

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