A bathroom is the hardest-working room in a house and the one most often got wrong. It takes a few litres of warm water several times a day, holds the moisture in the air afterwards, and is usually the smallest space anyone has to plan.
Most of what goes wrong in one is a ventilation problem wearing a disguise. Black grout, peeling paint, a window running with water each morning and a smell that will not shift are all the same story told four ways.
These pages cover the parts worth getting right, in the order they matter: moving the damp air out, laying the room out so it works, keeping water where it belongs, and dealing with surfaces once they have gone wrong.