Sioux Falls, SD (KWSN) - “What’s the white residue appearing on the outside of our beautiful Denny Sanford PREMIER Center?” If you’ve been wondering about this, here is the answer.
A key architectural element of the Denny Sanford PREMIER Center is precast, colored concrete. The white residue on the colored concrete is a common condition called efflorescence. Efflorescence occurs when salt migrates from within the concrete to the surface and forms a coating.
“The City is fully aware of the white residue on the building. It’s not uncommon to see this issue in the early years of recently constructed buildings. We are finalizing plans for it to be cleaned off the exterior,” says Mark Cotter, Director of Public Works.
The City of Sioux Falls is working with Gage Brothers, the subcontractor that installed the precast concrete, to clean off the residue. The work will take place this spring, when the weather improves.
“This natural process happens with some new concrete, and it’s more obvious here because the concrete is colored,” says Cotter. “It may come back again the next several years to a lesser extent, but over time it will not exist.”