Richard Cranium wrote:

I'm going to put crown moulding in the bathroom I'm remodeling. While
I was sanding the moulding I realized I didn't know which way was up.
I've been told that for years but never believed it.

With some styles such as dental moulding it is somewhat clear which
way it should be oriented but with other styles I haven't got a clue.
Is there a rule of thumb to tell which side should be up or is it
primarily what the individual prefers?

Thanks,
R.C.
if you look at the angles on the back side, you'll see that one way will
place the molding more on the wall than the other way. The orientation
that places the molding lower on the wall is the correct way.

"Finish Carpentry: The Best of Fine Homebuilding" is just one of many
books that will help get you up to speed on crown installation.

Dave