Does drywall help insulate?

[Gingerbreadman]

From an insulation point of view, is there much advantage in using drywall rather than installing paneling sheets directly to studs?

[MountainDon]

Not from the point of view of insulation.  But sheetrock with proper taping can help seal a wall against air movement. Of course the real air tightness should be accomplished with the exterior weather resistant barrier.

[Shawn B]

I've been in homes that only had T1-11 siding or similar, no OSB or plywood under-sheeting and they always felt cooler and drafty to me. If one was to install drywall and tape and mud it like normal then install paneling or T&G over that it should cut down on drafts, as Don suggests, and it might just add some intrinsic R value to the structure.

[waggin]

I've been in homes that only had T1-11 siding or similar, no OSB or plywood under-sheeting and they always felt cooler and drafty to me. If one was to install drywall and tape and mud it like normal then install paneling or T&G over that it should cut down on drafts, as Don suggests, and it might just add some intrinsic R value to the structure.

If I can piggyback a question onto the above, are there any moisture/condensation issues with adding paneling or tongue and groove boards onto ceiling sheetrock?