Scaffolding, when high up, indicates the dream is about your spiritual side (higher side). Other symbols in the dream give the specific subject matter. This will most likely be given by the building in question. Scaffolding around the education centre of a church is about your spiritual education. Scaffolding at a post office is about channeling and so on.
To be afraid when up high on scaffolding indicates a fear of persecution with regard to the spiritual issues you are delving into. This is common when getting into channeling, for instance.
