1) In general, an intermediary is a person or service that is involved as a third party between two or more end points in a communication or transaction.n the World Wide Web, the role of an intermediary is sometimes said to be no longer necessary as, for example, when you look up legal or medical information directly yourself or when you share files with other Internet users directly (see peer-to-peer).
A roof covers a building or home structure, protecting any belongings found within. There are a large number of materials that can be used to roof a building or home, including several types of metal roofing materials. These materials include steel, aluminum, copper and tin.
Â­When you think of a metal roof, you might have an image of a dilapidated old lean-to with a corrugated tin roof. Today's metal roofs, however, are a far cry from that image. Today roofs are usually made of an asphalt/fiberglass combination or wood shingles. Some small, flat roofs are done with tar, while rubber is quickly becoming another easy roofing option.