Can I use a siding nailer for framing?
Keeping this in consideration, what type of nail gun do I need for siding?
Nails Used Framing nailers use 3- to 4-inch nails made for piercing and joining lumber. A siding nailer uses shorter nails -- typically 1 1/4 to 2 1/2 inches, often with wider heads. Some siding nailers are designed for use with aluminum nails which work better with aluminum siding.
Consequently, can a roofing nailer be used for framing?
Answer: Most framing nailers have a minimum fastener (nail) length of 2". Whereas, roofing nails are typically 1 1/4". Siding nails require a smaller head than roofing nails, so you'll have to check with your local building center to see what's available for the roofing nailer you're going to use.
You can use a roofing nailer (1-3/4" galvanized nails) to install siding if you "blind nail" them, so you won't see the nail head at all. James Hardie's website has instructions on their website how to install their siding using roofing nails or a roofing nailer.