Since 1920, M-D has been inventing, developing, manufacturing and distributing quality products for building, decorating and ... weatherproofing your home. M-D Building Products, Inc. has a rich history of product development and manufacturing expertise. This history spans almost a century of designing and manufacturing products demanded by our customers. Our products are industry leaders or contend for industry leadership in every category. M-D has five manufacturing locations in the United States. These manufacturing facilities are located in: Oklahoma City, OK, Gainesville, GA, Brooklet, GA, Woodburn, OR, and West Columbia, SC. read more