Six fire departments fought a blaze at Dave Lyle's Wholesale's storage building at 2881 Landsford Road.
Lumber was among the damaged materials.
The departments that responded were Riverside Road, Charlotte Road/Van Wyck, Indian Land, Shiloh Unity, Elgin and Antioch.
The Elgin and Antioch departments brought foam and other equipment.
The call came out at about 8 a.m.
Details are sketchy now, and the cause is unknown, but there was a storm shortly before the blaze.