Main page content

Entity view (Content)

Entity view (Content)


Cross-laminated timber (CLT) solutions are an excellent substitute to the more traditional fossil fuel-intensive construction materials. Nevertheless, the use of mass timber poses some rather unique challenges in terms of acoustics.

This course presents the airborne sound reduction and impact noise isolation of lightweight floating floor systems and confirms that CLT-assemblies can provide satisfactory sound insulation. Results of lab measurements on different types of floor setups are shown, including floor solutions using discrete bearings with various thicknesses and/or different void depths and resilient mats and strips; and different floating floors such as plywood, particle and cementitious boards, with and without the use of constrained layer damping technique, as well as gypsum topping.

Learning Objectives

  • Understand lab test protocols for impact and airborne noise insulation

  • Know how variables like floor mass, type of board used, type and thickness of resilient support used, spacing between bearings, air void height and use of damping layers dropped ceiling influences the performance of CLT floor/ceiling assemblies

  • Identify main advantages of lightweight floor systems on CLT and understand if this type of solutions is the one that best suits a specific project

  • Interpret results on high-impact sound-insulating and airborne sound-insulating assemblies for CLT, [test done only considering direct transmission (Dd) and not considering flanking transmission (Df, Ff and Fd)]

  • Identify the acoustic limitations of using a “lightweight” structure

  • Design highly reusable/recyclable assemblies, in order to cope not only with the different acoustical requirements but also other criteria, such as aesthetic and functional criteria (e.g., fire resistance, compatibility with type of floor covering expected – deflection criteria, compatibility with use – like humid environment, integration with other building services, stability/structural integrity, desire to leave a building’s structure exposed as finish)

Note: webinar sessions will be held at fixed intervals depending on the number of people signing up. Registrants will be notified of the exact event date by email.