"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.”
Marshall Cohen—researcher and producer, CNN
Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association.
Dubuque was the first city in the United States to utilize cornstalks for the manufacture of insulating boards. Built in Dubuque in the 1920s, the MAIZEWOOD INSULATION COMPANY was operated by the Maizewood Products Corporation of Chicago, Illinois.
After cutting, the material was again washed and then mixed with rosin to give the finished product more water repellency. Two more refining machines were used to remove coarse pieces and leave the material in a silky condition ready for the final manufacturing step.
Production of maizewood was brought to an end with the development of the mechanical cornpicker which left the stalks unusable. In place of cornstalks, wood fiber was gathered by the Celotex Company which purchased the Maizewood Company. Production of ceiling tiles and panels expanded.