Since starting out over 90 years ago as a small, family-owned Hilo lumber mill, HPM Building Supply, now 100-percent employee-owned, has grown to include three full-service building supply centers and four lumber yards on the Big Island. The company manufactures pre-engineered trusses and wall-panels, metal roofing and pre-hung doors, and treats its own lumber. HPM also provides lumber, building supplies, home planning and custom metal roofing to Oahu, Maui and Kauai.