Since 1999, we have been supplying the mid-south area with all their insulation and garage door needs. Locally owned and operated, our owners have over 25 years of experience in the building industry. In addition to insulation and garage doors, Mason Dixon Gutter Co., Inc installs gutters and leaf protection for your home or business. We strive to provide a high level of courteous, professional service. Contact County Line Insulation, Inc today and schedule an appointment for any or all of our services. Garage Doors