nail paneling?

[källare]

I'm going to replace the paneling on my house gables. I will be installing tongue and groove paneling. Now to my question.
Should there be any space between the panels, or should they be installed tightly against each other?

 

[Immobil]

An air gap between the panel and the windbreak is never wrong.

 

[Wodie]

Voting for air gap !

 

[andersmc]

Air gap is the accepted term.

 

[Sowerhill]

Air gap and 1 nail/panel board on each stud...
When nailing tongue-and-groove paneling, it is important that it has the ability to move, so do not use more than 1 nail at each fastening point on the panels. This is to minimize cracking!