Hey all. I'm in the process of redoing all the exterior trim on my house, which we had "professionally" done last year. Horrible gaps, angles, etc are the issues I'm correcting. I've done the entire inside trim but this is my first attempt at exterior. Two questions; 1 - what size/type of fasteners to use? The contracter used trim nails (same as I use on the interior trim) which I then started with, but now I question their integrity for exterior trim use. 2 - what type of caulking to use? DAP exterior was used last year, and already it has shrunk tremendously to the point of exposing gaps. Most of it was not painted over, does this make a difference? Thanks!