Mould can form anywhere in a home. The most common problems are mould in the bathroom, bedroom, or cellar. Moulds develop in a damp area and need nutrients to survive. Plaster on the wall, but also the ceiling, wallpaper, wood, or fabrics are nutrients for mould in the home. For your bathroom, we recommend to warm up the bathroom before showering or using the bath and make sure the bathroom is well ventilated.