Are you going to be framing a door in an interior wall? You’ve gotta check out this detailed tutorial about how to frame the studs on an interior wall around a door opening. We will also explain how to calculate a door rough opening!
When we purchased our fixer upper, part of the renovation plans included transforming a second living room into a nursery, walk in closet and bathroom. That meant that we need to add new interior walls! Last week we shared a basic guide for how to build a wall and kept it to the basics, while promising we would give you more details if you needed to frame a door in your new interior wall.
As a follow up to our how to build a wall guide, we’re going to show you how to arrange the framing of the studs in your interior wall to account for a door. If you haven’t read the how to build a wall article, be sure to go back and start there first!! Today, we’re going to jump right in and talk about framing a door. Don’t worry, we’ll be sure to define all of the “lingo” and explain how to calculate your door rough opening!
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Keep reading if you are going to be framing a door in your interior wall!
Calculating your door rough opening
When you frame a space for a door in a stud wall, it is called a rough opening. Now let’s talk some “lingo” for a hot second. Doors are measured feet first and then inches second. For example: a 32″ wide 80″ tall door like we used is actually a referred to as a “2/8 door” or 2 feet + 8″ = 32″.
When calculating your door rough opening, you always add 1 1/2″ to 2 1/2″ for the height (depending on the flooring) and 2″ for the width. So the rough opening for the door we were installing was 81 1/2” – 82 1/2″ tall and 34″ wide.
Important note here about the height of the door rough opening, you should add 2 1/2″ if you are going to be adding flooring and 1 1/2” if you’re going to be using the original hardwood floors like we were. With the door we were installing, 82 1/2″ is assuming that you’ll be putting flooring in. In our case, we were going right over our hard wood floors we were going to restore so Logan framed the door rough opening at 81 1/2″.
Framing studs for door in wall
Next step when you are framing a door on a new interior wall is adding the studs for the door frame. You need to consider the jack studs, the king studs, and the header (which all make up the framing necessary for a door). The king studs go from the base plate and top plate (the base and top plate is just what 2×4 studs on the bottom and top of your wall are called).
If you’re lucky, the king studs will line up with the studs that will already be in the wall for your 16” on center studs in the interior wall framing. But if they don’t line up perfectly, then they may have to be added.
Next you’ll attach the jack studs, which are what you’ll be placing the header on (see photo above). The distance between your jack studs need to be equal to the rough opening width for your door, in our case this was 34″.
Now the jack stud will be sitting on top of the base plate, so don’t forget to account for the thickness of the base plate before you cut the jack stud. 2×4 studs are 1 1/2″ thick so your jack stud will need to be cut at 80″. Important note here about the height of the door rough opening, 82 1/2″ is assuming that you’ll be putting flooring in. In our case, we were going right over our hard wood floors we were going to restore so Logan framed the rough opening height at 81 1/2″.
Now that the king and jack studs are accounted for, it is time to consider the header of your door opening. When adding an interior wall, chances are that it is not going to be load bearing wall so the headers don’t need to account for any weight of the house. (If you do end up putting up a load bearing wall look up your local codes and be sure to frame accordingly.) This just means you can slap two 2×4 studs together that are cut to a length that will sit on top of your jack studs and between the king studs. The header should always be 3″ longer than your door rough opening width to sit on top of your jack studs, which are both 1 1/2″ thick.
You may notice that in our picture we didn’t use two 2×4 studs put together for the header. We actually had an old 4×6 lying around that was completely dried out, so Logan decided to use this instead. Whatever you do, don’t buy a new 4×4 or 4×6 and use them as headers. They will most likely twist and mess up your drywall later as wood fresh off the rack still has some moisture content. Once that moisture leaves the beams will twist. You don’t have to worry much about this with 2×4 studs because they are already kiln dried.
When building your wall the king studs will be worked into the framing of the wall. When you’re ready to start framing your door, cut your jack stud to the proper length and nail it to the base plate. Now add your header by putting it on top of the jack studs and nail it to both the jack studs and king studs. You can cut three or four 2×4’s to fill any space you may have between the header and top plate and nail in place. Place two these filler pieces on either side of the header and one or two in the middle evenly spaced.
If you’re building a wall, don’t forget to check out this post first for a basic guide on how to build a wall. If you need to a door to the wall, now you know how to frame it out and calculate your rough opening too! Next up you’ll hang your door and we’ve got a whole post about how to install a prehung door here!
Did you learn a lot from this tutorial on framing a door??
Let me know in the comments below!!
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