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Terrazzo and Acoustics:

Flooring That Hits the Right Note

In spaces where every sound matters, the floor can shape the entire experience. Terrazzo’s dense surface reflects rather than absorbs sound—an advantage in settings where clarity and projection are key. When quieter conditions are needed, terrazzo pairs easily with underlayments or acoustic systems to control impact noise. In every case, it delivers reliable acoustic performance and lasting durability.

St. Joan of Arc Catholic Church

At St. Joan of Arc Catholic Church in Lisle, Illinois, a centennial renovation replaced carpet with a handcrafted five-color terrazzo floor. Architect Douglas Lasch, principal with Faith Environ Studio Architects of La Grange, Illinois, advocated for terrazzo as both a visual and acoustic upgrade.

The hard surface improves clarity and resonance, enriching organ, piano, and congregational singing. “People were amazed by the difference,” said Mr. Lasch. Parish pastor Father Gabriel Baltes added that the enhanced acoustics of the terrazzo improve both music and spoken word, elevating the worship experience. The flowing ribbons of color reinforce the spiritual journey, combining artistry with acoustic effectiveness.

At the University of Minnesota’s Northrop Auditorium, terrazzo played a complementary role in a different acoustic strategy. The 1929 landmark underwent a full interior renovation in 2011 to create a state-of-the-art performance hall, under the direction of Jim Moore, AIA, LEED AP, associate vice president with Hammel, Green, and Abrahamson of Minneapolis.

While nearly everything inside was rebuilt, the original 85-year-old terrazzo in Memorial Hall was refinished and joined by a new award-winning installation in public areas, including upper stories. To prevent impact noise from upper floors and public areas outside the auditorium, the terrazzo was installed over a 3/8-inch resilient pad of recycled rubber. The result is a quiet, durable surface that supports the auditorium’s acoustic goals while preserving historical character.

University of Minnesota
Poured-in-place stairs

Poured-in-place stairs

Whether enhancing resonance in a church or managing noise around a performance hall, terrazzo demonstrates remarkable versatility. Its hard surface can improve sound where desired or work with acoustic systems to soften it. Terrazzo delivers enduring performance—both visually and functionally—for generations.

 

 

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