Traditional Rendering
To ensure adhesion, the surface to be rendered is initially hosed off to ensure it is free of any dirt and loose particles. Old paint or old render is scraped away. The surface is roughened to improve adhesion. For large areas vertical battens are fixed to the wall every 1 to 1.5 metres, to keep the render flat and even.
Cement render consists of 6 parts clean sharp fine sand, 1 part cement and 1 part lime. The lime makes the render more workable and reduces cracking when the render dries. Any general purpose cement can be used. Various additives can be added to the mix for increasing adhesion. Coarser sand is used as the base layer and slightly finer sand for the top layer.
Read more about this topic: Cement Render
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—Jean Szarkowski (b. 1925)
“How shalt thou hope for mercy, rendering none?”
—William Shakespeare (1564–1616)