Roofing Nailer Troubleshooting

Most roofing nailer problems trace back to three things: air pressure, the nails, or the depth setting. Here are the common issues and the quick fixes, from jams to double-firing.

Nails won't sink flush

• Raise the air pressure toward the top of the gun's range (often ~120 PSI) and increase the depth setting.
• Check your compressor's CFM — a unit that can't keep up starves the gun. See compressor sizing.
• Confirm you're using the correct coil nail length for your deck.

Nails overdriving (sinking too deep)

The opposite fix: lower the pressure and back off the depth dial until the head seats flush. Overdriving cuts through the shingle mat and causes blow-offs.

Jamming

• Clear the driver: disconnect the air, open the nose/magazine, and remove the stuck nail.
• Check the coil is seated correctly and the nails are the right size and not damaged/rusted.
• A drop of pneumatic oil (if your gun takes it) keeps the driver moving freely.

Double-firing

Usually technique: in bump-fire mode, letting the gun bounce fires a second nail. Switch to sequential mode for control, and don't ride the trigger. If it double-fires in sequential mode, the trigger valve or bumper may be worn.

Air leaks

A hiss at the trigger or exhaust usually means a worn O-ring or seal. Keep the gun oiled; if leaks persist, a rebuild/O-ring kit is cheap and brings most guns back to life.

Gun feels sluggish or dry

Add a few drops of pneumatic tool oil into the air inlet, cycle it a few times, and check your hose fittings for restrictions. Dry internals cause weak drives and jams.

Frequently asked questions