Green Harbor Overhead Door offers garage doors and openers in Marshfield, MA. Call us today. Our goal is to be the overhead door company of choice in the South Shore area. We sell the best products at a fair price. We provide sales, installation and service for garage doors and openers. We are totally committed to your safety and security both in the products and services we provide and in our staffing policies. That is why all of our highly trained service personnel and estimators undergo rigorous background checks and drug screenings and each is fully licensed and insured. Green Harbor Overhead Door has the solution that is right for your unique situation.