Over the years, many people have had issues with using wood in their bathrooms as however well you coat it, paint it or varnish it the constant expansion and contraction coupled with the moist air conditions means that eventually the surface will break down and need maintenance.
Any easy way to overcome these issues while retaining the appeal of a wood finish is to install a wood effect ceiling panel.
Ceiling panels are made from PVC so do not suffer any of the problems associated with wooden ceilings. They are easy to install and can even be put up over your existing bathroom ceiling so there is no fuss and no mess.
These ceiling panels are also totally unaffected by water so they can be used over showers without having to worry about any water damage.