DeWalt 20V Roofing Nailer: The DCN45RN, In Plain English
Updated April 2026 · 8 min read
The DeWalt DCN45RN is the company's only 20V MAX cordless roofing nailer, and for anyone already on the DeWalt battery platform it's the easy pick over pneumatic for service work. Here's what you actually get for the sticker, where it earns the price, and where it doesn't.
What the DeWalt 20V roofing nailer actually is
The DCN45RN is a battery-powered, wire-collated coil roofing nailer. It runs on the standard DeWalt 20V MAX battery — the same one that powers your drills, impacts, and circular saws. Drives industry-standard 15-degree coil nails from 3/4" to 1-3/4", which covers every typical asphalt-shingle job.
Mechanically it's a flywheel-driven gun, not a gas-cell design. That means no fuel cartridges to buy, no cold-weather misfires from gas pressure, and instant first-shot readiness when you pull the trigger.
Specs at a glance
- Battery: DeWalt 20V MAX (any pack, 2.0Ah and up)
- Nail capacity: 3/4" to 1-3/4" wire-collated 15° coil roofing nails
- Magazine: Side-load, holds one full coil (~120 nails)
- Trigger: Bump-fire and sequential, switchable
- Weight: ~7.2 lb with 2.0Ah battery
- Drives per charge: ~750 (2.0Ah) / ~1,500–1,800 (5.0Ah)
Where the DeWalt 20V roofing nailer wins
- No compressor, no hose — walk up the ladder and start working
- Battery shared with the rest of your DeWalt kit — no new platform to buy into
- Consistent drive depth — flywheel sets every nail to the same depth regardless of battery state
- Bump-fire keeps up — fast enough for production roofs, not just service work
- No fuel cells — unlike Paslode, you're not buying consumables
Where it loses to pneumatic
- Weight: 7.2 lb vs ~5.5 lb for a Bostitch RN46. You feel that on a 12-hour roof.
- Cycle delay: there's a brief flywheel spin-up between shots in sequential mode. Pneumatic is instant.
- Cold weather: battery runtime drops 20–30% below 40°F.
- Cost of entry: bare tool versus kit pricing if you don't already own DeWalt 20V.
Battery strategy
Don't buy the kit with one 2.0Ah battery — you'll be charging it constantly. The right setup is two 5.0Ah batteries (or one 5.0 + one 8.0 if you have an 8.0 already). That gets you ~3,500 nails between swaps, which is enough for a small to mid-size roof without thinking about it.
DeWalt 20V vs Bostitch RN46 (pneumatic)
This is the most common cross-shop. The honest answer: if you do mostly service calls, repairs, and one-off shingle work, the DeWalt 20V wins on convenience by a mile. If you do full re-roofs every week, the Bostitch RN46 plus a compressor wins on weight, speed, and total cost. Most pros end up owning both. Full breakdown in our DeWalt vs Bostitch comparison.
DeWalt 20V vs Milwaukee M18 vs Metabo HPT MultiVolt
All three are credible cordless roofing nailers. DeWalt has the largest installed base of 20V batteries, Milwaukee has the slight edge on raw drive power, and the Metabo HPT MultiVolt can run on AC or 36V battery. Pick whichever battery platform you already own. See the full cordless roofing nailers shortlist.
What size nails to use
The DCN45RN accepts standard 15-degree wire-collated coil roofing nails from 3/4" to 1-3/4". For most residential re-roofs over 5/8" sheathing, 1-1/4" is the right call. See the sizing guide for the full breakdown by deck thickness and shingle type.
Bottom line on the DeWalt 20V roofing nailer
Buy it if you're already on the DeWalt 20V MAX platform and want one tool that handles small roofs, repairs, and shingle service work without dragging out the compressor. Skip it if you don't own DeWalt batteries yet and are mostly doing big production roofs — the math doesn't work. Browse the lineup on our DeWalt brand page or read the long-term DCN45RN review before you commit.