I d say every 10th nail comes out at such an angle to clip the edge of the hole and either crack the siding or just put a hole in the edge that you have to pry out to allow the siding to move.
Installing vinyl siding with nail gun.
The gun should have adjustments so you can change the pressure used based on the type of siding you are nailing into.
The problem should be easy to diagnose.
Use aluminum galvanized steel or other corrosion resistant nails staples or screws when installing vinyl siding.
Aluminum trim pieces require aluminum or stainless steel fasteners.
You cannot use a brad gun for installing siding because the brads leave two holes for each brad and do not hold up as well as siding nails.
You can use a hand powered staple gun but both nails and staples must penetrate the backing.
All fasteners must be able to penetrate a minimum of 1 1 4 32mm into nailable material such as wood sheathing and framing fig.
For this reason manufacturers design it to hang loosely on the nails rather than to be tightly nailed like wood siding.
Because of this a pneumatic nail gun can make the job much easier.
If you are doing regular horizontal siding the trick really is to make sure you are holding the gun square to the siding and to the building.
Vinyl siding tends to expand and contract considerably with temperature changes.
Simply go outside grab the lower edges of a siding course and try to slide it back and forth photo 1.
Installing vinyl siding involves a lot of nailing.
Technique however is critical.
Choose a nail gun that will accept siding nails.