Should tongue and groove siding be caulked?
are you talking about vertical planks?
if so it's not going to be terribly weathertight. if it were my house, first of all i would replace with a horizontal clapboard or something more effective at keeping water out (not caulked), but if i had to use t&G i would probably caulk.
if this were a shed or a clubhouse or something i wouldn't bother caulking.
it all depends on your construction, what kind of vapor/water barrier is behind it, what kind of overhangs you have, what kind of insulation, etc...
FYI - i just spent a week replacing rotten board and batten siding all around a house on the bottom few feet. this was built in the 60s. i think any kind of vertical siding like this is asking for trouble.
only place it's appropriate is barns and sheds.
Last edited by wombosi; 08-15-2010 at 12:50 PM.