I have always thought that the tops and bottoms of doors should not be painted. And this seemed to be confirmed by the fact that almost every door I ever noticed was indeed unpainted top and bottom. (OK, I didn't inspect that many door bottoms - that would be sad.)
But now a new doors warns that it should have the bottom painted before installation - and that the top should also be painted.
Opinions? Is it important?
Isn't this all about the timber absorbing moisture through the end grain and swelling, if unsealed? Therefore, relevant on external doors but not otherwise?
David
Makes sense except for a couple of things. First, these are specifically internal doors. Second, my observation of non-painting has included external doors!
Of course the instruction could be "universal" and unimportant re internal doors.
Important on bathroom and laundry doors.
How much of it is a warning and how much a reminder? Painting the bottom after installation tends to be harder :-)
I used to have a friend who painted his bottom.
Bill
IME paint has a negligible effect on the passage of water vapour in and out of the end grain
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