The front door, i.e. a movable outer element, which closes the opening in the front wall of the building. Thanks to it, we can freely enter and leave the building, illuminate or ventilate it, as well as lock it. Detached houses are usually equipped with single leaf doors, which are sometimes partially glazed. Sometimes they have a small door for a cat or a slot through which a postman puts letters. A bell or a knocker are placed on the door or placed near it. The house entrance should be properly illuminated for safety reasons. During the Christmas period, you can decorate the door with a wreath and place a doormat with a funny inscription underneath it.