Maund said the expansion includes additional flex space to build its machines. He said Demco, which employs 16 people, renovated a building next to its existing location. Maund, who bought Demco in 2010 following the death of its founder, David Duemler, said the company's 15,000-square-foot expansion gives it 35,000 square feet. The expansion includes manufacturing assembly bays, laboratory space and offices.