How many plasterboard sheets do I need? By the Plankley team · Last checked 19 October 2026 On this pageSizesWalls vs ceilingsOffcutsFire and moisture-resistant boards (sourced)When to hire a plasterer Sizes Walls vs ceilings Offcuts Fire and moisture-resistant boards (sourced) When to hire a plasterer Related pagesPlastering guides SourcesGOV.UK: replace with the specific page; Researcher to verify