Open a new door with the help of one of these experts on our directory. Whether you need a new door hung or installed, or just want to buy a new one, the names on this list are the best in Long Island. No need to look online and sift through reviews, we've done that work for you! Every door retailer and expert on this list has been rated at 3 stars or higher. Here you will find only the top-rated door experts on all of Long Island.