Usquare Feder

For the project Usquare Feder in Brussels, BC materials developed an acoustic earth plaster which absorbs sound. For this project a plaster mix was conceived with soft granulates such as hemp and cork enrobed by earth from Brussels’ excavated sand and clay.

A room with 80m2 of wall surface was prototyped with contractor Het Leemniscaat. The bottom 2m are finished in a base earth plaster and above 2m in acoustical earth plaster. Sound absorption was subsequently tested in situ by VK engineers to arrive at an absorption coefficient of α = 0,35. This value situates the acoustic earth plaster in the midrange of market alternatives such as acoustic PUR-foam panels. However, with the added benefit of direct wall surface application compared to a selected number of panels, the acoustic earth plaster achieves superior sound absorption. Currently, contractor HC renovation is assigned to execute 2000m2 of acoustical earth plaster in the project.

Location
BrusselsBelgium
Client
VUB,ULB, SAU / MSI
Concept
2019
Architect
evr-architecten + BC architects & studies
Contractors
Het Leemniscaat HC renovation
Restoration
Callebaut architecten
Type of act
Consulting & development