- Measure around the edges of the fireplace where the trim will go. Write down the measurements.
- Select a type of trim that will complement the style of the room or that matches the room's molding.
- Measure a piece of trim to the height of the fireplace. Make a small mark with a pencil on the front right side of the trim. Because the trim must extend around the fireplace, you must make 45-degree cuts to it to fit vertical and horizontal pieces together.
- Place the trim face up under a saw and have the length of the trim you will be using extending out to the left. The mark should be closest to you. Adjust the saw to a 45-degree angle cut that will start at the mark and extend up to the right of you. Make the cut.
- Measure another piece of trim for the other side of the fireplace. Place a mark on the front left side of the trim. Place the trim face up under the saw so that the trim you are going to use is extending out to the right and the mark is closest to you.
- Adjust the saw to cut a 45-degree angle cut starting at the mark and extending up to the left of you. Make the cut.
- Measure a piece of trim to go across the top of the fireplace. Make two marks on the front of the trim on one side. Place the trim under the saw so that the marks are closest to you.
- Adjust the saw to make a 45-degree angle out from both marks. The cut on the right side should angle up and to the right, and the cut on the left should angle up and to the left. Both cuts should start from the marks. Make the cuts.
- Place the trim against the fireplace where measured. Hammer 1-inch nails through the trim and into the wall. The angled cuts will allow the pieces to fit together. Sand the cuts down slightly if they are a little long. If a small gap shows, fill it in with wood putty.
Things You Will Need
- Trim strips
- Adjustable circular saw
- Measuring tape
- 1-inch nails
- You can counter sink the nails just below the surface and fill them with wood putty to hide them. It is best to paint or stain the pieces of trim before attaching them around the fireplace.