Restoration Projects February 2021

Restoration Projects

Minneapolis Municipal Building

Minneapolis Municipal Building

Long and Kees Architects, 1887

  • October 2020
  • Custom KEIM coating to match the pattern and appearance of existing granite.
Chicago Gulf Club

(Photo courtesy of

Chicago Golf Club

Jarvis Hunt, 1894


  • January 2016
  • Aggregate and color matching for Custom Type N Mortar.

Promontory Apartments

The Promontory Apartments

Ludwig Mies van der Rohe, 1949


  • September 2020
  • Custom blended concrete designed for form and pour patching on the facade of the building.


SC Johnson Headquarters

Frank Lloyd Wright, 1936

  • July 2020
  • Color match using Jahn M120 marble repair mortar.
  • Wet sanding technique used to hone the stone to the finish of the original.


South Hall at University of California, Berkeley

Farquharson & Kenitzer, 1873

  • July 2020 
  • Repair mortar (JAHN M70) custom matched to green sandstone.
  • Natural speckling added using Keim Design-Lasur coating.

(Photo courtesy of NoeHill in San Francisco)

Pacific Building

Charles Whittlesey, 1907

  • July 2020
  • Match to the entirety of the terracotta masonry units.
  • Keim coating to imitate various shades of green found on cladding as well as white highlights.
  • M100 repair mortar match to the clay component of the masonry.

Hunter-Dulin Building

Schultze & Weaver, 1925

  • June 2020
  • Prepared Keim silicate matches to various terra cotta and glazed brick samples using a custom application method.
  • Developed an M100 color match representative of both the color of the clay as well as the background color of the glaze.
Merchandise Mart Closeup

Merchandise Mart

Graham, Anderson, Probst & White, 1928

  • April 2020
  • Custom-matched patching material using Jahn M70 repair mortar.
Tribune Tower In Chicago Illinois,

The Tribune Tower

Howells & Hood, 1925

  • August 2018
  • ASTM C1324 Testing and Analysis
The Glass House

The Glass House

Philip Johnson, 1949

  • January 2018
  • Custom blended ceiling plaster.
Chicago's Museum Of Science And Industry

The Museum of Science and Industry

D.H Burnham & Co., 1893

  • August 2017
  • Custom blended KEIM coating with mica inclusions to match original terracotta.

The Gage Building

Louis Sullivan, 1898

  • March 2017
  • Custom blended KEIM coating with mica inclusions to match original terracotta
friable masonry lime putty

The Frederick C. Robie House

Frank Lloyd Wright, 1909

  • 2016-2019
  • Custom blended lime putty plaster & custom-blended magnesite flooring
The Rotunda, Michigan State Capitol

Michigan State Capitol

Elijah E. Myers, 1878

  • September 2016
  • Custom blended natural hydraulic lime plaster

(Photo by Eric Allix Rogers, courtesy of OpenHouse Chicago)

UIC University Hall

Walter Netsche, 1963-1965

  • March 2016
  • Custom designed concrete facade repair material poured onsite from our mobile mix truck fleet

Unity Temple

Frank Lloyd Wright, 1908


  • January 2016
  • Custom plaster sand & custom – concrete floor repair material.