A rendering is a type of plaster and drywall work that covers the exterior walls of a house.
A liquid render mixture is applied to the wall, then usually trowelled or textured to create different finishes according to taste, be it flat render style with its plain finish, possibly covered with wallpaper; corrugated render for an old-fashioned look; or lumpy render perfect for rustic homes.
The render surface could be painted before decoration starts or left unplastered so that decorative paint can take effect. There are various shapes used in render types such as swan necks, hips and ridges which can create interesting effects on this flat surface.”
When render is used on an exterior wall, the surface must be primed with a bonding agent before render is applied. The render mix usually contains sand, lime, and cement. Pigment may also be added to create a desired colour.
The render is applied with a hawk and trowel. A hawk is a metal or wooden tray with a handle. When held at an angle, it allows plaster to be thrown or dragged against the surface of the wall to create render.
The render is then smoothed and left in place until dry and hard (usually within 24 hours). The render may need covering with netting in order to protect it from falling debris in strong winds.