
Nailing baseboard trim to a baseboard is a crucial step in the installation process. While it is often overlooked, it is important to note that walls are rarely perfectly straight and corners are not always at the intended angles. To nail baseboard trim to a baseboard, you will need a few tools and supplies, including a miter saw, a brad nailer or nail gun, a caulk gun, and wood glue. The process involves cutting and measuring the trim to fit the baseboard, using adhesive or glue, and nailing the trim to the baseboard at the studs. Filling nail holes with spackling paste, wax filling sticks, or wood filler and touching up the seams with paint can help create a smooth and professional finish.
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What You'll Learn

Use a nail gun for efficiency
Using a nail gun is the easiest and most effective way to nail in baseboards. Finish nail guns, also known as trim nail guns, are ideal for installing baseboards. They are relatively inexpensive, ranging from $80 to $200, and will last for years. They can also be used for other home improvement projects. Finish nail guns are designed for shooting 15-gauge or 16-gauge nails and use finish nailheads, which are easily identifiable by their angled storage on the nailer.
Before nailing the baseboards to the wall, it is important to locate the studs using a stud finder. When attaching baseboards, use 8d finish nails, driving them at a slight downward angle near the top and bottom edges of the board. For a cleaner finish, use a nail set to drive the nail heads just below the wood surface. This allows for a secure hold and easy removal if needed.
When installing baseboards in long runs or around corners, you will need to join pieces together seamlessly. For inside corners, simply butt the baseboard ends together and nail them to the wall. For outside corners, miter the ends of both pieces at 45 degrees to ensure a snug fit. For added strength, use wood glue and biscuit joints to reinforce the connection. Remember to dry-fit all pieces before final installation to ensure a perfect fit.
To fill in the nail holes, you can use spackling paste, wax filling sticks, or a water-based wood filler if your wood will be stained.
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Survey the wall before nailing
Before nailing on your baseboards, it is important to survey the wall. This is because it will help you decide on the length of your baseboards and avoid unsightly seams. For instance, if you cut your baseboards to 16', the joint may land under a wall sconce that lights up the seam. On the other hand, if you cut it to 13', the seam may be hidden behind a recliner. Therefore, it is important to plan the placement of your baseboards before nailing them to the wall.
Another reason to survey the wall is to locate the studs. When attaching baseboards, it is recommended to use 8d finish nails, driving them at a slight downward angle near the top and bottom edges of the board. For added strength, use wood glue and biscuit joints to reinforce the connection. For a cleaner finish, use a nail set to drive the nail heads just below the wood surface. This will provide a secure hold while allowing for easy removal if needed in the future.
Additionally, surveying the wall will help you identify any wall imperfections that need to be addressed before installing the baseboards. Accurate measurements and precise cuts lead to a more professional-looking installation. Carefully measure the length of each wall section where the baseboards will be installed, accounting for any wall irregularities. For outside corners, add a few extra inches to allow for miter cuts. Number each wall section and write corresponding numbers on the back of the cut baseboards to keep everything organized.
Furthermore, the wall survey will help you determine the highest point of your floor using a 4-foot level. This will be your reference point for maintaining a consistent height throughout the room. Mark this height on the wall and use a chalk line to snap a level line around the room's perimeter. This line will guide the top edge of your baseboards, ensuring they remain level even if the floor isn't.
Finally, when installing baseboards, it is important to consider the type of corners you will be working with. For inside corners, simply butt the baseboard ends together and nail them to the wall. For outside corners, miter the ends of both pieces at 45 degrees, ensuring they fit snugly together. Dry-fit all pieces before final installation to ensure a perfect fit. Test pieces of baseboard molding can be used to prepare inside corners and ensure tight joints before nailing anything to the wall.
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Use a nail set for a cleaner finish
Using a nail set is a great way to achieve a cleaner finish when nailing baseboard trim to the baseboard. A nail set is an attachment that can be used to drive the nail heads just below the wood surface, resulting in a secure hold while also allowing for easy removal if needed in the future. This method is particularly useful for inside corners, where you can simply butt the baseboard ends together and nail them to the wall.
To use a nail set effectively, follow these steps:
- Locate the studs on the wall using a stud finder or a knock test to identify the empty spaces between the studs.
- Prepare the baseboard trim by cutting it to the appropriate size, ensuring that it fits well with the baseboard.
- Apply adhesive to the back of the baseboard trim and the molding, distributing it evenly with a caulking gun.
- Attach the baseboard trim to the baseboard by securing it with finishing nails and a hammer. Drive the nails at a slight downward angle near the top and bottom edges of the board.
- Use the nail set to hammer the nails in at a steep angle, ensuring that the nail heads are just below the wood surface.
- Fill the nail holes with wood glue or wood filler and let it dry.
- Use sandpaper to smooth out the filled nail holes, creating a seamless and clean finish.
Using a nail set in conjunction with finishing nails provides a strong and secure hold for your baseboard trim while also maintaining the aesthetics of the wood. This method is especially useful if you ever need to remove the trim in the future, as it allows for easier nail removal compared to other methods.
While nailing by hand is an option, using a nail gun is the easiest and most effective way to nail in baseboards. Finish nail guns, in particular, are ideal for this purpose and are relatively inexpensive, making them a great investment for home improvement projects. However, if you don't have access to a nail gun, you can still achieve a clean and secure finish by following the steps outlined above and using a nail set.
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Use the right size nails
Using the right size nails is crucial for nailing baseboard trim to the baseboard. The size of the nails will depend on the type of baseboard you're installing and your personal preference for tools.
If you're installing a stain-grade baseboard, you'll want to use a water-based wood filler to fill any nail holes. In this case, it's best to use smaller nails to reduce the amount of filler needed and make the process easier. For baseboards that will be stained, Mohawk offers a range of wood fillers and products that can be used to fill nail holes.
For a standard baseboard, 8d finish nails are typically used. These nails are driven at a slight downward angle near the top and bottom edges of the board. A nail set can be used to drive the nail heads just below the wood surface for a cleaner finish. Finish nail guns are ideal for this purpose and are relatively inexpensive, ranging from $80 to $200. They can also be used for other home improvement projects, providing a great return on investment.
When nailing baseboard trim, it's important to ensure that the nails go through the drywall and not through the air. This means that the nails should be long enough to penetrate the baseboard and reach the stud behind it. A stud finder can be used to locate the studs and mark their positions before nailing.
Additionally, when joining two pieces of baseboard in the middle of a wall, it's important to nail the joint over a stud to keep the ends tight. The first trim board should be cut about 1 inch short of a stud with a 30-degree bevel facing the room. It can then be nailed into all the studs. The second board is cut with the same bevel but in the opposite direction, and wood glue is applied before nailing the overlapping piece into the stud near the joint.
In summary, using the right size nails for nailing baseboard trim involves considering the type of baseboard, the tools available, and the need to reach the studs for a secure hold. Smaller nails are preferable for stain-grade baseboards, while 8d finish nails are standard for typical baseboards. Finish nail guns are a popular choice for driving nails at the proper angle, and stud finders ensure nails reach the studs for stability.
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Fill nail holes with wax filling sticks
Filling nail holes with wax filling sticks is a common method used to fill nail holes in trim and cabinets. This method is not suitable for walls as paint does not stick to wax.
There are several different wax fillers available. Some wax filling sticks do not require any heat to melt the stick. These sticks are designed to be used like crayons, where you simply scribble over the hole to fill it and then wipe off any excess wax with a cloth rag. This method is not suitable for natural-finish trim as it may leave a waxy halo around the nail hole.
Another method is to use a heat gun, paint thinner, or a lighter to soften the wax stick before applying it to the nail hole. This can be done by swiping the nail hole with paint thinner to melt the wax and then rubbing the surface smooth with a cloth. Alternatively, you can use a small flathead screwdriver to scoop out a small amount of wax and insert it directly into the hole. Any excess wax can be scraped off with a small plastic scraper.
It is important to select a wax filling stick that matches the colour of your stain or paint. These sticks can be purchased from hardware stores, but they tend to be pricey. As a more affordable alternative, you can use a crayon in a matching colour to fill the nail holes. Simply apply firm pressure and rub the crayon over the nail hole, and then wipe off any excess with a dry rag.
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Frequently asked questions
You will need a miter saw, a brad nailer, a caulk gun, cartridges, and wood glue. A nail gun is the easiest and most effective way to nail in baseboards. If you don't have a nail gun, you can use a hammer and nails.
Before nailing, measure the perimeter of the room and each wall at least twice, accounting for any wall irregularities. Cut the baseboards to size, leaving a little extra material so you can adjust as needed. Apply adhesive to the back of the baseboard and the moulding.
Use finishing nails and a hammer to secure the baseboard moulding to the wall at the studs. Insert two finishing nails into each stud at the base of the baseboard. Use a nail set to drive the nail heads just below the wood surface.
Fillers come in a variety of colours, but you can also use a furniture marker to colour match the nail hole. Spackling paste is a good option as it is designed to form and stay in place.









































