External walls, especially older ones, are often made of brick or stone. These brick and stone facades are great because they are easily repaired and parts of them can be replaced. However, they are not always the best insulators. Bricks and stones don’t make great insulators because they are sometimes made in irregular shapes, which means they won’t fit together perfectly, leaving space for draughts. Furthermore, the mortar holding bricks and stones together can dry out and begin to crumble over time. Older walls are particularly susceptible to these problems. You can fight this decay with quality external rendering.
- Rendering is the process of applying a smooth paste to an uneven surface to create an even facade.
- The rendering plaster itself is typically made of cement and a binder.
- The plasterer will apply the plaster to the outside of the walls and scrape it until it is smooth, creating a smooth surface to the building and helping to preserve it.
Preserving the Building
Rendering the walls serves two distinct purposes: It offers an extra layer of cement to hold the wall together beyond only the mortar between bricks, and it also seals up any gaps that might be occurring in the wall. Sealing up those gaps helps to create a better insulated wall. A rendered wall is smoother than brick, which often means that water will slide off it quicker. Walls that dry faster and insulate better will help lower your heating costs.