
Wall trim is a great way to add character to your home, and it's a simple DIY project that can provide beautiful architectural detail to any room. Before installing wall trim, it is faster and easier to paint or stain the moulding. When you're ready to install, use a sharp pencil to mark the location of the wall studs. Then, trim the moulding with a miter saw to match the exact length you need. Pre-drill the moulding at each wall stud location, and then nail them into place. You can use a nail gun or a hammer and nail set for this step. For the best results, you may want to pre-drill the holes for your nails to avoid bending them and leaving marks in the trim. Finally, cover any nail holes with wood filler or putty and touch up with paint or stain.
| Characteristics | Values |
|---|---|
| Tools | Hammer, nail set, drill, nail gun, air nailer, compressor, DeWalt DCN680D1 20V brad nailer, sharp pencil, miter saw, coping saw, sandpaper |
| Materials | Paint, finish, wood putty, caulk, adhesives, moulding, baseboard trim, plywood, wood glue, filler |
| Preparation | Paint or stain moulding before installing, cover nail holes with wood putty, fill gaps with caulk, locate wall studs and mark them, trim moulding to required length, pre-drill moulding at each wall stud |
| Installation | Nail moulding into place, use adhesive to install moulding, nail through joints, nail into lower 1½ inch of trim with 2-inch finishing nails spaced roughly 16 inches apart |
| Post-installation | Touch up moulding edges with leftover paint or finish, fill nail holes with wood filler, sand away excess filler |
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What You'll Learn

Prepare the moulding by painting or staining it before installation
Preparing your moulding before installation will save you time and energy in the long run. Painting or staining your moulding before you install it is a good idea, and you should follow the manufacturer's instructions on coats and drying times. Set the mouldings aside to dry in a dust-free space. Keep some of the paint or finish to touch up any edges or nail holes after installation.
If you are installing baseboard trim, you may want to consider using a nail gun, as hand-nailing baseboards can be a laborious task. Using a nail gun will speed up the process, and you can rent one if you don't want to buy. If you are nailing by hand, it is recommended to drill pilot holes first, to avoid damaging the trim. You can also use an air nailer, which does not require a compressor.
If you are installing crown moulding, you will want to nail into the joists and studs at the top and bottom of the moulding. For baseboards, nailing into the lower third of the moulding increases the chance of hitting the bottom plate inside the wall.
If you are installing wall moulding, you can cut the moulding at a 45-degree angle to create outside corners, and fit them together at a 90-degree angle where two walls meet. For inside corners, most professionals prefer the coped method, which involves holding the saw at an angle to back-cut the material slightly, creating a puzzle piece-like fit.
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Use a nail gun to speed up the process
Using a nail gun is a simple and straightforward process that can speed up the process of putting up wall trim. Nail guns can be used for indoor and outdoor building, repair, and woodworking projects. They can increase your speed and efficiency when taking on a DIY task.
Before using a nail gun, it is important to understand its components and how they work. The safety tip of the nail gun is designed to retract into the gun when you press down on the work surface. This ensures that the nail gun only fires when it is pressed down on a surface, preventing accidental firing.
To use a nail gun, first, remove the battery and load nails into the chamber by pressing the magazine release button. Adjust the air pressure dial according to the density of the material surface—denser materials may require higher air pressure. You can twist the depth-of-drive knob to make finer adjustments to the nail depth. Test the nail gun on a piece of scrap wood and make any necessary adjustments.
When you are ready to begin, align the nail gun at a 90-degree angle to your work surface. Locate the area where you want to fire the nail and press down so that the safety tip retracts. Keep your work area free of bystanders, as a nail gun can fire through the other side of a wall.
Using a nail gun can make the process of putting up wall trim much faster and easier. It eliminates the need for manual hammering and drilling, saving you time and effort.
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Drill pilot holes to make nailing easier
Drilling pilot holes is a good idea if you want to make nailing easier when putting up wall trim. It is especially helpful if you don't have the upper body strength to drive in nails or to hold a drill steady to put in a screw. Pilot holes can also be useful if you have very hard trim or if you want to avoid bending nails, which can leave hard-to-fill marks.
To begin, locate the wall studs and mark their locations. Then, hold the trim moulding against the wall and mark the locations for the pilot holes. Use a drill bit that is slightly smaller than the diameter of your nails to drill holes at each marked location. This will ensure that the nails go through the trim effortlessly and that you only need force to drive them into the stud.
When drilling the pilot holes, it is important to drill straight and not at an angle to avoid damaging the trim. It is also a good idea to drill slowly and carefully to avoid drilling all the way through the trim or the wall. Once the pilot holes are drilled, you can simply hammer the nails into the holes, and the trim will hold securely in place.
Additionally, if you are joining two pieces of trim, you can drill pilot holes and use nails to join the pieces together before nailing them to the wall. This will ensure a strong joint that will not separate over time.
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Use a nail set to protect the trim
When putting up wall trim with a nail, a nail set is a useful tool to have. A nail set is a small metal piece with a divot that fits over the nail head. It keeps the hammer away from the trim and prevents hammer marks on the trim. It also helps to drive the nail head slightly below the surface of the trim, giving a clean finish.
To use a nail set, first, pound the nail into the trim with a hammer until the nail head is slightly above the surface of the trim. Then, place the tip of the nail set on the nail head. Gently tap the nail set with a hammer to drive the nail head about 1/8 inch below the surface of the trim. This ensures that the nail holds tightly and securely.
Nail sets are particularly useful when working with thin and narrow trim boards. These boards must be anchored firmly to the wall to prevent them from pulling away or developing gaps between the joints. By using a nail set, you can ensure that the nails are driven into the wall studs securely, providing a strong hold for the trim.
Additionally, when working in tight corners, it is recommended to drill a small pilot hole in the trim before using the nail set. This helps to guide the nail through the trim and into the stud, reducing the risk of bending the nail or leaving marks on the trim. The pilot hole should be slightly narrower than the nail's shank and drilled through the molding piece, but not too deeply into the stud.
Using a nail set is a precise and effective way to protect the trim when installing wall trim with nails. It helps to drive the nails securely into the wall studs while minimising damage and marks on the trim itself, resulting in a neat and sturdy finish.
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Cover nail holes with wood filler
To cover nail holes with wood filler, follow these steps:
Firstly, ensure you have all the necessary tools and materials for the job. You will need wood filler, which can be purchased from any hardware store. It is also recommended to have leftover paint or finish to touch up the wall trim after filling the nail holes.
Before applying the wood filler, it is important to prepare the surface. Locate and mark the wall studs, and use a miter saw to trim the moulding to match the desired length. Pre-drill the moulding at each wall stud location to create pilot holes, which will make it easier to drive the nails in and reduce the risk of bending them.
Once the surface is prepared, you can start filling the nail holes with wood filler. Apply a generous amount of wood filler to each nail hole, making sure it covers the entire hole. Use your finger or a small tool to smooth out the filler and ensure it is flush with the surface. Allow the wood filler to dry completely, following the manufacturer's instructions for drying time.
After the wood filler has dried, lightly sand the area to create a smooth surface. If needed, you can sculpt and shape the wood filler to match the surrounding trim. This step is important to ensure a seamless finish. Finally, apply a coat of paint or finish to match the surrounding trim. It is recommended to use a primer before painting to ensure better adhesion and a uniform finish.
By following these steps, you can effectively cover nail holes with wood filler when installing wall trim.
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Frequently asked questions
To put up wall trim with nails, follow these steps:
- Cut the trim at the appropriate angle, typically 45 degrees.
- Drill pilot holes in the trim to make nailing easier and prevent damage.
- Locate the wall studs and mark their positions.
- Nail the trim to the wall studs.
- Cover any nail holes with wood filler or putty and paint to match the trim.
You will need a sharp pencil, a drill, a hammer, a nail set, and a saw. You may also want to use a nail gun to speed up the process.
Yes, you can use adhesives to install most wall trim. Check with the manufacturer for their recommended adhesive.
Use a saw to cut the trim at the desired angle. A miter saw is recommended for cutting precise angles.
Use finishing nails that are long enough to secure the trim to the wall studs. For baseboards, 2-inch nails spaced 16 inches apart are typically recommended.











































