Home Depot announced it is increasing efforts to attract professional contractors to its retail stores. An article published in the Atlanta Journal-Constitution reports on the company’s initiatives to beef-up products and services, including “house calls,” to plumbers, electricians and general remodelers operating as one-man shops. The article says that 35 percent of Home Depot’s retail sales come from only 4 percent of its customers - small professional contractors who were not likely buying supplies at HD Supply, Home Depot’s former wholesale unit that it recently sold to private investors.