I have just had the ceiling replaced in a bedroom, do I need to undercoat it?

New plaster board (Gyprock) is very porous and usually has the joints between the boards flushed and sanded smooth. An undercoat both seals the porosity and creates an even texture that helps hide the flushing joints.

New plaster board (Gyprock) is very porous and usually has the joints between the boards flushed and sanded smooth. An undercoat both seals the porosity and creates an even texture that helps hide the flushing joints. Undercoating new plasterboard can also help the washability, colour coverage and opacity of you painting project.