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How Do You Trim An Interior Door

 
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Old 05-09-2019, 12:25 AM   #1
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How Do You Trim An Interior Door


I do a lot of finish work and I end up trimming a bunch of doors. Same motion every time, mark top corner reveals, pin left leg to jamb right leg to jam, fit header in between, nail off. After 10 doors today I’m wondering how everyone else does it. I’m going to try hanging the header first next chance and see if I like it. Let me hear what you got.
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Old 05-09-2019, 12:40 AM   #2
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Re: How Do You Trim An Interior Door


if the casing isn't pre-built I have always found it easier to to the heads first, it is a lot easier to adjust the sides to the head instead of the other way around

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Old 05-09-2019, 05:39 AM   #3
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Re: How Do You Trim An Interior Door


Yep, heads first.

As a side note, if you had just posted "How to trim an interior door" without a description of how you do it; you would having gotten hazed.

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Old 05-09-2019, 06:28 AM   #4
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Re: How Do You Trim An Interior Door


Quote:
Originally Posted by SSremodeler View Post
I do a lot of finish work and I end up trimming a bunch of doors. Same motion every time, mark top corner reveals, pin left leg to jamb right leg to jam, fit header in between, nail off. After 10 doors today Im wondering how everyone else does it. Im going to try hanging the header first next chance and see if I like it. Let me hear what you got.
I do it your original way. Sides then head.
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Old 05-09-2019, 06:51 AM   #5
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Re: How Do You Trim An Interior Door


How do you folks mark the casing for your cuts? Do you hold it up to your reveal point, mark it (pencil or utility knife), or just take a measurement and go cut some stock?

Do you assume it's always square to the opposing side (after eyeballing it), and just cut 45's?
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Old 05-09-2019, 07:25 AM   #6
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Re: How Do You Trim An Interior Door


I go left to right. Left side first,then top, then right side. That lets me tweak the top left miter to get it perfect before i cut the top right miter. Then i will have about a four foot piece that i do a miter cut on until i get it to fit perfect and then i will cut the right piece to length with the miter on it that i made on my practice piece. If there is carpet going on the floor i will not use the four foot practice piece. I will cut the right side to the floor and get my miter perfect and then cut it to length.
Hope that makes sense.

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Old 05-09-2019, 08:48 AM   #7
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Re: How Do You Trim An Interior Door


If the floor isn't level, you have to do the head first, otherwise it'll come out all crooked.

Yeah, I do a lot of remodel.
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Old 05-09-2019, 08:49 AM   #8
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Re: How Do You Trim An Interior Door


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Originally Posted by MarkJames View Post

Do you assume it's always square to the opposing side (after eyeballing it), and just cut 45's?
If you hung your door level, and your head casing is level, you should have a 45.
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Old 05-09-2019, 09:02 AM   #9
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Re: How Do You Trim An Interior Door


I just did 59 windows, 7 exterior doors and 24 interior doors in a new construction, I always do the sides first and then the tops. Of course it helps that I hung the doors and windows One other thing, all of the windows had 4.5" sills and some were triples and doubles. All were cased with 3.5" pre primed colonial casing.
I make a square block out of 1x stock about 1.5" then rabbet all four sides to a quarter inch for my reveal, I find it easier than using my combination square. The last block I made lasted about 20 years and then suddenly disappeared.
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Old 05-09-2019, 09:22 AM   #10
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Re: How Do You Trim An Interior Door


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Originally Posted by Seven-Delta-FortyOne View Post
If you hung your door level, and your head casing is level, you should have a 45.
Genius!
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Old 05-09-2019, 09:41 AM   #11
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Re: How Do You Trim An Interior Door


Head first, the the sides.

I just mark the reveals with my baby combo square or run it down the sides as I nail.

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Old 05-09-2019, 11:12 AM   #12
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Re: How Do You Trim An Interior Door


I also do heads first then the legs. It’s much easier to fit one miter than two, especially with large architectural moldings. And I don’t use a gauge block, just train your eye for whatever your intended reveal is, sometimes it’s 3/16”, sometimes it’s 1/4” depending on the design. But if you train your eye you won’t be wasting time marking jambs with a gauge block.
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Old 05-09-2019, 11:15 AM   #13
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Re: How Do You Trim An Interior Door


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Originally Posted by Seven-Delta-FortyOne View Post
If you hung your door level, and your head casing is level, you should have a 45.
I hang my doors plumb not level, but it is INCREDIBLY rare to cut all miters at 45 and expect them to fit perfectly. They are almost always 45.5-45.9.
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Old 05-09-2019, 11:57 AM   #14
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Re: How Do You Trim An Interior Door


No one pre-assembles?
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Old 05-09-2019, 12:01 PM   #15
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Re: How Do You Trim An Interior Door


For me it’s pretty rare that I can pre-assemble casing. On 7/16” x 2 1/4” casing sure, it’s a great option because it will flex enough that you can get it tight to drywall and the jamb. But on 3/4” thick x 4-5” casing it’s usually not an option because you can’t get it tight to the jamb and drywall.
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Old 05-09-2019, 08:22 PM   #16
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Re: How Do You Trim An Interior Door


Quote:
Originally Posted by dave_dj1 View Post
I just did 59 windows, 7 exterior doors and 24 interior doors in a new construction, I always do the sides first and then the tops. Of course it helps that I hung the doors and windows One other thing, all of the windows had 4.5" sills and some were triples and doubles. All were cased with 3.5" pre primed colonial casing.

I make a square block out of 1x stock about 1.5" then rabbet all four sides to a quarter inch for my reveal, I find it easier than using my combination square. The last block I made lasted about 20 years and then suddenly disappeared.


I made a similar block. I think my first one ended up in the garbage cleaning up one day. Painted the second one yellow so its easier to not lose.
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Old 05-10-2019, 12:25 AM   #17
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Re: How Do You Trim An Interior Door


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I hang my doors plumb not level, but it is INCREDIBLY rare to cut all miters at 45 and expect them to fit perfectly. They are almost always 45.5-45.9.
How do you do that? 45.9 cuts make a 91.8 angle. With the head jamb being level the bottom of the leg would be 2 1/2" out over 80". . If your jamb is plumb AND level 45 Will be perfect.
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Old 05-10-2019, 06:20 AM   #18
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Re: How Do You Trim An Interior Door


Seems like a good method.


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Old 05-10-2019, 06:48 AM   #19
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Re: How Do You Trim An Interior Door


Did so many of them I don't even remember the pattern

But when doing a whole house, I would mark all the reveals (been using this Kreg's multi-purpose marking and measuring tool for years, the best thing when working with trim, highly recommend for the finish carpentry trade people)...
Mark all the legs and tack them on all doors but still allow play for adjustments...
Get top measurements from the top edges of all legs end to end and for the most part there is no need for another trip to the saw, except a few minor adjustments here and there... but you bang out the entire house fairly quickly and everything is nice and tight, glued miters, etc
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Old 05-10-2019, 07:14 AM   #20
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Re: How Do You Trim An Interior Door


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that is at least 3 trips to the saw for each side of the door, way too many trips

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