This step by step article is about installing door casing. Installing door casing is a fun and easy diy project, provided you have the right tools and materials. Before you begin the actual installation of the door trim, you should measure attentively the perimeter of the door. Nevertheless, when buying door casing, you should pay attention to the following aspect: you should purchase two long trims for the side jambs and a shorter one for the head door.
In addition, we recommend you to buy prepainted door casing, as it will give a professional edge to your door. We don’t say it’s impossible to paint door casing by yourself, but from our experience we assert it’s hard to obtain the same finish as compared to pre-painted trim. Moreover, when buying door casing, you have to check if the trim is wide enough to hide the space between the jamb and the wood studs.
In order to secure door casing, you have to use finishing nails, as they are almost unnoticeable to the human eye and can be caulked easily. Therefore, when buying the nails from your local diy store, make sure you get the ones with small heads and very thin.
If around the door jam there are installed baseboards, you should remove them temporarily, as to be able to install the door casing from the floor up to the door head. After you have installed the door casing, you can secure the baseboards in the remaining spot.
Made from this plan
In order to install door casing, you need the following:
- Door casing
- Finishing nails
- Use a miter saw, to make accurate corner joints
- 30 minutes
Installing door casing
Installing door casing is not difficult nor time consuming, if you use the right materials and tools. Consequently, beside the actual door casing, you also need a spirit level, a hammer, a miter saw and 20-30 finishing nails.
The door casing should match the design and the color of the interior door, consequently you should choose the one which fit your needs and tastes.
The first step of installing door casing, is to mark the cutting lines on the head trim. Consequently, you should use a spirit level over the top casing as to make sure it is aligned. In addition, you should place the casing at about 1/2” from the bottom of the door header.
Make one mark on one side of the casing, just over the corner joint of the door jamb.
Next, you have to use a miter saw to cut the door casing at 45º. Make sure the blade of the miter saw is exactly over the mark, otherwise you will get a wrong cut. We recommend you to make the cut progressively, otherwise you will have to sand the edge.
While you use the miter saw, you have to use safety glasses, as to avoid any possible injuries. In addition, make sure the miter saw is locked into position, otherwise it might move during the process.
After you have made the 45º cut, you should make the mark on the opposite side. Although it is possible to make both cuts from the very beginning, we recommend you to proceed like this, as it is much safe (by making both cuts at once, you can make a mistake much easier).
Make sure you use the spirit level over the top casting, otherwise your joints won’t be perfect.
After you have made the cuts, by using the miter saw, you should secure the casting by driving in several finishing nails. Make sure you use a hammer and a couple of finishing nails, to secure the top casting into position. We recommend you not to tap the nails definitively, but to let 1/4 of them out. In this way, in case the side castings won’t fit, you can remove it without any issues.
When driving in the nails, make sure you don’t damage the jamb.
Next, you have to install the side castings. Consequently, use a spirit level as to make sure it is plumb, and make a mark as to cut it at 45º. In order to get a nice appearance, do not leave any gap between the side casing and the floor. If the casing doesn’t touch the floor, it is very hard to conceal this gap.
It is important to leave the same space around the door jamb on all sides, otherwise you won’t be able to make the corner joints properly.
After you have made the 45º cut, it is time to fit it into position, as to check if it aligns properly. In addition, you also have to use a spirit level, as to make sure the casting is plumb. As you can notice in this image, the casting doesn’t have all sides even, that is why you should pay attention while you make the cuts.
Work with patience as to avoid any mistake during the process. If you set the miter saw at 45º and you take accurate measurements you will get the job done in a professional manner.
In order to fasten the side door casting, you should drive in finishing nails every 10-15”. While you insert the nails, you should use the spirit level, as to make sure the casting is plumb. In order to secure the trim properly, you can insert nails both in the door jamb and in the wood studs.
In this image, you can see how the door casing looks, after you have installed 2/3 of the of the door casing. As you can see, installing door casing changes dramatically the look of your doors and adds personality to your home.
On the market, there are so many options that you can find door casting that will match your needs and tastes. From our experience, if the door is installed properly, it is better to install casting directly on the door jamb, rather than cut them and connect them together.
Next, you have to continue installing door casing on the other side of the door, by using the same techniques as described above. You should drive finishing nails every 10-15” around the door casing, otherwise there might remain gaps between the door casting and the jamb.
After you have inserted the finishing nails you might consider them too noticeable. In this situation, you can caulk them by using a good paintable caulk. After the caulk has dried out, you can paint the small dots with a similar color as the door casing.
Thank you for reading our article on installing door casing, and we recommend you to check out the rest of our projects. Please share our projects with your friends, by using the social media widgets.