Why screws instead of nails

[Jody]

What is correct when installing Vinyle siding in a mobile home. I know with regular homes roof nails are used. What we've found is that when contractors didn't hit the studs for the insulation it worked out within a day. With a mobile home and movement I'm concern if the final product will with stand using roof nails? Any information would help. Thank you!

[Eugene]

First, you are mistaken regarding roofing nails for vinyl siding. Roofing nails are for roofing, A proper vinyl siding installation will use Aluminum nails that may look like a roofing nail.
When you hammer a roofing nail in place, you knock off the galvenized coating and the nail will rust.
The manufactured housing industry generally uses corrosion resistant staples. these will do just fine.