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.
A number of factors should be considered when selecting the roofing material for your home. These include the local availability of materials, their climatic suitability, and whether they are suitable for installation on the particular shape of roof you're planning to build. In some circumstances however, societyâs tastes and fashions will have final say over which roof materials are selected.