Founded in 1982, Darby Doors is a leading manufacturer specializing in doors, millwork, hardware, bath accessories and buildi ... ng specialties. Via Total Trim, Darby Doors' provides customers installation services for the company's products. Darby Doors is a division of US LBM, a leading distributor of specialty building materials in the United States. US LBM combines the scale and operational advantages of a national platform with a local go-to-market strategy through its national network of locations across the country. read more