Depends what they are used for in dream. Can be security in life if flooring – or sense of losing basic support if rotten floor. See: floor under house and buildings. If for making something: Ones potential; the materials you have for undertaking a project or ‘making something of oneself’. If nailed above one: Feeling of being trapped, fear of death; setting up ones own death, in the sense of killing ones chances in work or relationship. See: fence; coffin; wood.