
Nailing baseboard trim is a crucial step in the installation process. While it may be overlooked, it is important to ensure that your baseboards are securely attached to the wall. There are several approaches to nailing baseboards, and the spacing between nails depends on the length of the baseboard and the number of studs that need to be hit. The easiest and most effective way to nail in baseboards is with a nail gun, specifically a finish (trim) nail gun. This project is relatively straightforward, but it is important to take safety precautions when using power tools, such as wearing safety glasses and earplugs.
| Characteristics | Values |
|---|---|
| Importance of nailing baseboard trim | Attaching your baseboards to the wall is a crucial step in the installation process. |
| Tools | A nail gun, preferably a finish (trim) nail gun, is the easiest and most effective tool for nailing baseboards. |
| Nail type | 8d finish nails are recommended. |
| Nail spacing | Nails should be spaced approximately 16" apart, hitting the studs along the way. |
| Filler | Spackling paste is the best filler for nail holes in baseboards as it is designed to form and stay in place. |
| Wood type | Baseboards should be acclimated to the room's temperature and humidity conditions before installation to prevent gaps or warping. |
| Joint type | A scarf joint is used when two boards meet on a long wall or straight run. |
| Corner type | Outside corners require mitering the ends of both pieces at 45-degree angles. |
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What You'll Learn

Nail gun or hammer?
While there are several approaches to nailing baseboards, using a nail gun or a hammer are the two most common methods.
Using a hammer is the traditional way of nailing baseboards. However, it is not recommended for beginners as it can easily damage the baseboard. Hammers require some skill to use effectively, and even experienced users can accidentally dent the baseboard with a misplaced or overly forceful strike. In addition, using a hammer is slower than using a nail gun.
Nail guns, on the other hand, are faster and more efficient than hammers. They are also less likely to damage the baseboard. Finish nail guns, for example, use smaller nails that leave smaller holes, which are easier to fill and conceal with wood putty. Pneumatic finish nailers, in particular, have no-mar tips that press firmly against the workpiece to prevent splintering of wood surfaces. They also allow for more precise nailing, as users can control how far the nail is driven into the baseboard. Finish nail guns are also relatively inexpensive, usually ranging from $80 to $200, and can be used for many other home improvement projects.
However, using a nail gun may require an additional purchase, which may not be ideal for those on a tight budget or who do not foresee themselves using it again. In such cases, borrowing from someone who owns one may be a good option.
Ultimately, the choice between using a nail gun or a hammer depends on factors such as budget, skill level, and the desired speed and quality of the work.
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Spacing nails
For larger baseboards, such as those ranging from 3 1/4 inches to 5 1/4 inches in width, it is recommended to hit the wall studs along the way, a few inches up from the bottom. This involves nailing every 16 inches on the top and approximately every 24 inches on the bottom, ensuring that you hit the bottom plate. It is important to locate the studs before nailing by using a stud finder or measuring 16 inches from a known stud to find the rest.
When installing baseboards, it is ideal to drive nails into the wall studs rather than just the drywall. This provides a stronger hold and reduces the risk of the baseboards becoming loose over time. If you are unable or unwilling to locate all the studs, a closer nail spacing, such as every 12 inches, can be sufficient to ensure a secure attachment.
Additionally, it is recommended to tack the baseboard in place with one nail at each side and then find the studs with a stud sensor, marking their locations on the baseboard as you go. This ensures that you hit the studs with the majority of your nails while maintaining a secure attachment.
It is worth noting that the thickness and weight of the trim should also be considered when selecting nail sizes and spacing. For thicker and heavier baseboards, finishing nails provide better holding power, while brads are more suitable for lighter and more delicate trim pieces.
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Removing old baseboards
Prepare the Area
Before you start prying off the baseboards, it's important to prepare the area. If your baseboards have been caulked, use a utility knife or a razor blade to cut through the caulk along the top edge of the baseboard. This will help prevent the drywall paper from tearing when you start removing the baseboard. You should also do this if there is a build-up of paint along the top—use a sharp knife to cut through it so that you don't pull off large pieces of paint when removing the baseboard.
Start at an Outside Corner
When you're ready to start removing the baseboards, it's generally easier to begin at an outside corner. Inside corners can be more difficult because the miters may lock the pieces more tightly in place.
Use a Trim Puller or Pry Bar
The easiest and fastest way to remove baseboards without damaging your walls is by using a Trim Puller. This tool has a sharp tapered edge and a wedged center that helps push the baseboard away from the wall. It also has a larger surface area that contacts the wall, so you don't need a block of wood to disperse the pressure. If you don't have access to a Trim Puller, you can use a pry bar or flat bar. Work your way slowly along the edge of the baseboard, prying it away from the wall. If you're using a pry bar, consider using a piece of plywood or metal behind the bar to protect the wall and spread the pressure.
Remove Leftover Nails
Once you've removed a section of baseboard, use a hammer to remove any leftover nails. Hold a block of wood near the base of the drywall to support it while you hammer out the nails. You can also use pliers to remove finishing nails.
Label and Store
If you plan to reinstall the baseboards, label or number them on the back and the wall so you know exactly where each piece goes. Store the baseboards somewhere out of the way so they don't become a trip hazard or get damaged.
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Filler for nail holes
When installing baseboards, it is crucial to attach them to the wall, and filling the nail holes is essential to achieving a finished look. While paint may seem to cover the holes, they will often become visible in the form of tiny dimples when the paint dries.
The best filler for nail holes in baseboards is spackling paste. Its texture makes it more amenable to filling holes, and it can be easily cleaned up and sanded for an even finish. If you need to reapply, simply repeat the process of adding more and sanding. Spackling paste can also be used for other situations like drywall, or other trim fillers like scarf joints, inside and outside corners, and bullnose corners.
If the baseboard will be stained, a water-based wood filler is recommended. These fillers come in a range of colours to match common wood species, and can also be mixed to create custom colours. When applying water-based filler, keep a damp cloth nearby to wipe partially dried filler off your finger to ensure consistent application. Avoid pressing excess filler into the holes, as it may not adhere to the wood's surface effectively.
For deeper or larger holes, a putty knife may be required to fill a larger area and create a flat finished surface. Simply scoop up a small amount of filler with the edge of the knife, press it into the hole, and smooth off the top to remove any excess.
If the trim is painted, any colour of wood filler can be used since it will be covered with paint. Caulk can also be used as a quick alternative, but it tends to be messier, shrinks more, and cannot be sanded smooth like filler.
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Baseboard angles
When installing baseboards, it is important to consider the angles at which the baseboards will be joined at the corners. While walls are often assumed to be straight with corners at intended angles, this is not always the case.
There are several methods to determine the appropriate angle for joining baseboards at corners. One common method is to use a bevel gauge to mark the angle on a scrap piece of wood or cardboard. The angle can then be bisected using a compass, and a new line can be marked to set the bevel. Alternatively, a protractor can be used to halve the angle instead of bisecting it. For those seeking a faster and more modern approach, a digital bevel gauge can be used to halve the angle.
Another method to determine the correct angle is by using masking tape or drywall paper tape. The tape is laid against the wall, with the pieces overlapping in the corner. The tape is then folded in half, which bisects the angle and provides the required miter angle.
When cutting the baseboards, it is important to set the miter angle of the saw to 45 degrees in the direction of the running molding. For baseboards coming from the right, the miter angle should be moved to the right (3 o'clock), while for those coming from the left, the angle should be moved to the left (9 o'clock). The bevel angle should also be set to 45 degrees in the direction of the running molding. This ensures that the cut will be on the correct side of the length of the molding.
In terms of nailing the baseboards, it is recommended to use a nail gun, specifically a finish (trim) nail gun. This type of nail gun is relatively inexpensive, ranging from $80 to $200, and can be used for various home improvement projects. When spacing the nails, it is generally recommended to find one stud and then measure 16" on-center to locate the rest of them. Alternatively, spacing the nails every 12 inches would also be sufficient.
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Frequently asked questions
You will need a nail gun, a stud finder, a utility knife, a pry bar, pliers or a nail puller, a sliding T bevel, a tape measure, a compound power miter saw, a finishing nailer, safety glasses, and earplugs.
First, measure the perimeter of the room, rounding up to the nearest whole-foot dimension divisible by two. Bring your baseboards into the installation area a few days before you start the project to allow the wood to adjust to the room's conditions. Then, use a stud finder to mark the stud locations on the wall. Next, tack the baseboard in place with one nail at each side, and then find the studs with a stud sensor, marking on the baseboard as you go. Drive 8d finish nails at a slight downward angle near the top and bottom edges of the board.
Spackling paste is a good option for filling in nail holes as it is designed to form and stay in place and doesn't change shape easily. Wood filler can also be used to fill in nail holes and small gaps between the baseboard and the wall.











































