When doing carpentry and woodworking projects, selecting the right finish nailer can have a big impact on the quality of your work. From installing trim and molding to assembling cabinets, each nailer serves a specific purpose. This Old House expert, Chris Ermides, demonstrates various finish nailers and explains their different uses, helping beginners and professionals understand which tool is best for certain tasks.
Types of Finish Nailers
Finish nailers come in different gauges, which refer to the thickness of the nail. Higher numbers indicate thinner nails. Knowing the differences between these gauges can help you decide which nailer to use for your project.
Pro Tip: The most common finish nailer gauges are 15, 16, 18, and 23. A 15-gauge nailer fires a larger nail with substantial holding power, available from 1¼ inches to 2½ inches long, making it ideal for heavier trim work like hanging crown molding or running baseboard. An 18-gauge brad nailer, on the other hand, shoots nails as short as ⅝ inch for detail work and up to 2 inches, which is better suited for small or delicate trim pieces. When it comes to trimming windows, running base, hanging crown, or tackling a delicate woodworking project, one gun can’t do it all—each is designed to accomplish an individual task.
15-Gauge Finish Nailers
A 15-gauge finish nailer is the heavyweight of the bunch, shooting thick nails between 1 1/4–2 1/2 inches long. These nailers are best for installing large interior and exterior casing, hanging pre-hung doors, securing stair treads and risers, and attaching baseboards and crown molding.
Nails fired by 15-gauge nailers have a larger head for better grip and stability. However, they do leave a noticeable hole that requires attention. These nailers are durable and strong, making them fit for heavy-duty carpentry tasks.
Pro Tip: Because 15-gauge finish nails leave a visible hole, proper technique matters when sinking them. As This Old House general contractor Tom Silva advises for finish nails: “If you try to drive them flush, you’ll scar the wood. Drive them to head level, then sink them with a nailset.” Once set, fill the hole with putty for a clean, professional look.
16-Gauge Finish Nailers
The 16-gauge finish nailer is often considered the most versatile option. It strikes a balance between holding power and minimal wood splitting. These nailers typically shoot nails ranging from 3/4–2 1/2 inches long.
Their applications include installing interior trim, attaching baseboards and crown molding, securing stair risers, and nailing down tongue-and-groove flooring near walls or in tight spaces. Their middle-ground gauge size makes them flexible for different types of wood and trim, making these nailers the right tool for a range of projects.
18-Gauge Brad Nailers
An 18-gauge brad nailer is the go-to choice for delicate trim work and woodworking projects. They fire thin nails between 3/8–2 inches long, depending on the model. These nailers are best for attaching casing to windows and door jambs, installing stop moldings and base shoes, and securing cove moldings and chair rails.
The small head of the nails leaves a minimal hole, reducing the risk of splitting thinner wood. This makes 18-gauge nailers a good fit for more intricate work while still providing a strong bond.
Pro Tip: This Old House general contractor Tom Silva recommends brad nailers for cabinetry, furniture, and delicate trim: “The thin, 18-gauge nails that brad nailers shoot have less chance of splitting or marring the wood surface than the thicker 15- or 16-gauge nails that finish nailers use, and brads leave a much smaller hole to fill. That can be a real advantage when installing small or delicate trim pieces like shoe or crown molding.”
23-Gauge Pin Nailers
The 23-gauge pin nailer is designed for fine detail work and typically fires headless pins or very small-headed pins. These nailers are fit for attaching mitered returns, securing thing moldings, adding decorative details to woodwork, and installing beads and thin stops.
Pin nailers are often used with wood glue, acting as a temporary clamp while the adhesive sets. They leave virtually no visible holes and require minimal to no filling.
Pro Tip: This Old House general contractor Tom Silva advises: “Pin nails are prone to bending and blowing out the side of your work. To keep that from happening, hold the gun in line with the grain of the workpiece.”
Pneumatic vs. Cordless Nailers
Finish nailers are available in pneumatic and cordless configurations, each with its own advantages. Choosing between pneumatic and cordless options often depends on your specific needs and work environment.
Pneumatic Nailers
Pneumatic nailers are powered by compressed air delivered through a hose from a compressor. They’re lightweight, well-balanced, and fast at firing. However, they require a compressor and air hose, which limits mobility. Despite this, many professionals prefer pneumatic nailers for their consistent power and speed.
Cordless Nailers
Cordless nailers come in two main types: battery-powered with gas cartridges and battery-only models.
Battery and Gas Cartridge Models
These nailers use a rechargeable battery and a fuel cartridge. They’re portable and convenient without the need for air hoses or compressors. However, they require more maintenance and have ongoing fuel cartridge costs. Also, if you use them frequently, the cost of fuel and maintenance can add up over time.
Battery-Only Models
The latest cordless nailers run solely on battery power. They provide good portability and minimal maintenance without needing to replace fuel cartridges. While they can be heavier than other options, they offer great power and convenience. Advances in battery technology have made these nailers more popular, making them more powerful and durable.
Advantages and Disadvantages of Different Finish Nailers
Understanding both the advantages and disadvantages of different nailers can help you make the right choice.
Advantages and Disadvantages of Pneumatic Nailers
Pneumatic nailers, also known as air nailers, are ideal for professionals and large-scale projects. They’re powered by compressed air, providing a consistent and powerful driving force. This makes them highly effective for driving nails into hard materials such as hardwoods. These are also more lightweight due to not having an onboard battery or motor, and they don’t require ongoing costs with fuel cartridges. Plus, they fire rapidly, so you can do extensive jobs more quickly. Pneumatic nailers are typically cheaper upfront and have a longer lifespan thanks to their durability.
However, pneumatic nailers are limited in mobility by the need for a compressor and air hose, requiring more set-up time to connect these parts. Air hoses can also create tripping hazards on job sites. These nailers do require some ongoing upkeep, such as oiling, to stay in good condition.
Advantages and Disadvantages of Cordless Nailers
Cordless nailers are much more portable and convenient, as they don’t require a compressor or air hose. Since there’s no need to connect to an air compressor or set up hoses, you can start working immediately, saving time on setup. Cordless nailers are powered by rechargeable batteries, eliminating the need for external power sources or air compressors. This makes them ideal for small jobs or projects where speed and convenience are priorities.
However, cordless nailers are generally heavier because of the battery components, requiring regular battery charging and potential fuel cartridge replacement. Often, these nailers are more expensive upfront compared to pneumatic options.
Choosing the Right Finish Nailer
When selecting a finish nailer, consider your project type, material, portability, and budget. If you’re primarily doing trim work and can only choose one nailer, the 16-gauge model offers the best versatility. For woodworking, an 18-gauge nailer might be the best choice. Professional carpenters may benefit from having multiple nailers to choose from and cover all applications.
