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Rendering Rendering is another type of external finish. It is like plaster, but for the outside of a building. Render is a mixture of cement, sand, and sometimes lime. Workers apply it to the outside walls in a thick layer. It can be smooth or textured. After it dries, it can be painted. Rendering protects the walls from rain and gives the building a clean, uniform look. It is common on houses in many countries. CONVERSATION 2: Fixing the Render A homeowner is talking to a plasterer.  Ho