Duo Fast Cap Nailer DCR175CN

By Robert Robillard on Roofing

DCR175-CN In Line Cap Nailer Review

The folks at Duo-Fast recently sent me their Duo Fast Cap Nailer DCR175CN to review.

The DCR175CN is a pneumatic nailer that is designed to deliver a 7/8 to 1-3/4 inch roofing nail along with a plastic cap to effectively and efficiently install building house wrap, synthetic roofing underlayment and roofing felt.

This cap nailer results in a better more reliable weather seal and install by holding better than older traditional fastening.  The result is a fastener that resists tearing from wind and elements.

First Impression:

The Duo Fast Cap Nailer DCR175CN weighs 8 pounds and is not light but is well balanced.  The “in-line” design means that the plastic caps and nails are stored in line and self feed.

The tool was easy to adjust for nail size as well as load.   It takes a standard  coil of roofing nails and a spool of 240 caps.    The caps come in a carton of 10 totaling 4200 caps.

Using the Duo Fast Cap Nailer DCR175CN:

We used the  on the job site installing Tyvek house wrap.  There is no comparison when you compare the duo-Fast caps to conventional hammer stapler or hand nailing with roofing nails.  Staples just for not hold up to the weather and wind and hand nailing is just too cumbersome and time consuming.  Plus the caps hold the seams of the house wrap tight ensuring that the building envelope stays in tack and the structure dry prior to the siding being installed.

The DCR175-CN also has a depth of drive function that is easy to adjust and worked well.   A switch at the back end of the tool can shut off the caps allowing you to install roofing nails only is desired.


Uses  standard roofing coil nail
In-Line Design provides balanced tool and consistent drive of fasteners (Patented Design)
Protects against tearing and water damage
 Tool Features
Bump and Sequential fire
Nail only fire method ( Button on top of tool to turn off caps)
Tool-less adjustable depth of drive adjustment
Open spool loading
Quick clear nose


Model Number: DF175-CN
Part #: 511300
Weight: 8.23 lbs.
Cap Capacity: 420 caps/Spool
Nails Capacity: 120 coil nails
.120 shank 7/8” – 1-3/4” length
Power: 90-120 psi range
Warranty: 1 year, 90 day-limited


240 caps per roll
10 spools per ctn.
2,400 caps per ctn.

Video of DCR175-CN in use:

Watch my video demonstrating the usefulness of this nailer

If your a roofer or siding contractor the Duo Fast Cap Nailer DCR175CN is a no brain-er and should be in your tool box.

The Duo-Fast cap system uses less fasteners than conventional methods and holds better.  It has quickly become the “best practice” when installing building house wrap, synthetic roofing underlayment and roofing felt.

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About the author

Robert Robillard

Carpenter / Remodeler / Editor

Rob Robillard is “The Concord Carpenter” Rob is a builder, general contractor, carpenter, woodworker, and editor of Concord Carpenter and ToolBoxBuzz As a General Contractor and carpenter, Rob owns and operates Concord Carpenter LLC. A full-service remodeling and construction company. Rob is a recognized leader in home building best practices and a source for how-to information for building professionals. On this website, Rob covers all aspects of home construction, building science, home improvement, woodworking, remodeling, and some of the best product and tool reviews. Rob is in charge of our Tool and Product Review series - Concord Carpenter Videos where we post all of our tool reviews and video tutorials. Rob approaches remodeling and building construction with a pragmatic and problem-solving approach. He enjoys using his knowledge and experience to help and educate building professionals as well as DIYers on best practices in the construction and remodeling industry. He's a strong advocate for "raising the bar" in the construction trades and promoting the trades to youth. #BeAMentor #Green2Great Craftsmanship, quality, and pride guide his journey on this channel The Concord Carpenter's motto: "Well done is better than well said!" : Read more about Rob

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