To become a certified plasterer, the tradie would have been under apprenticeship for several years and earned a Certificate III in Solid Plastering. The total time depends on the employer and exact type of certification they want to achieve.
Being a plasterer is a skilled trade and some qualities are needed. They often work under aggressive deadlines and need to have attention to detail to avoid mistakes and subsequent delays. They also need to be physically fit to keep up all day at the worksite.
Plaster is picky with how it is applied and dries. Cracking can be caused by coats that are too thick or thin, moister loss, and uneven drying. Minor cracks can be fixed with a gap filler and some paint, but sometimes cracks can be too large to patch. When plaster shows evidence of cracking and
The intended surface needs to be prepped before plaster can be applied. Remove anything like wallpaper and poor paint with a scraper or sandpaper. PVA or a textured tape can also be put on the surface to increase the surface area for plaster to bind to.