Are you asking about crown molding?

Kinda something like this. Not just the molding, but along the sides if possible.

https://goo.gl/images/sHrPpG

Ask your architect.

What is a "half-vaulted great room"? Do you have an architect or interior designer?

@Virgil Carter Fine Art, I have no idea what the industry name for it is, but here's an image of what the room will look like.

A vault or slope going up from 9' to 13.25'. It doesn't go back down, in this room.

http://www.arivehomes.com/wp-content/uploads/2016/08/Kitchen_Dining01-3.jpg

And to everyone, no, I don't have an interior designer or architect. I don't want this to be offensive, but nobody would be on Houzz.com if the site only existed so Pros can come tell everyone to talk to their architect.

I am here for advice. If I paid someone to be my architect, I wouldn't be here asking.

We want a casing

What are you referring to when you say "casing"?

So you now see a benefit of having an architect.

And according to the link you provided, your great room ceiling slopes up at a 3/12 pitch for about 90% of the length of the great room then slopes back down at the same pitch for the remaining 10%. You may want someone there to show you exactly what it is planned to look like, it may look odd to you. Casing will not help.

I totally agree, having an architect there is the way to go, and the way I will go once that time gets closer and more concrete.

I am sure most options would look odd and just wouldn't fit well between the great room and dining room, just wanna get some professional opinions on it since I don't know much about this type of work.

@PPF, by casing I am referring to something like the framing between the great room and dining/kitchen in this image:

https://drive.google.com/file/d/109T8x0aghOFgF3HzkT2BIxlEbKrfR8PA/view?usp=drivesdk

Colby - What you are asking for is a cased opening between kitchen and great room.

I am a non-pro. You mention "having an architect there is the way to go". That is confusing - an architect would be making the plans and you appear to already have plans.

I find the 1/2 vaulted great room awkward. A casing would make it worse. A vault in 2018 is something that should only be done by an architect in an appropriate style house. Otherwise it looks like something shoved in just to be interesting. That is entirely my opinion.

Your plans list C.O. on certain openings and this is "Cased Opening".

It seems to me that if you wanted a cased opening it should have been designed that way from the beginning. Adding trim now won't work unless you do a lot of re-structuring. Just leave it the way it is. Classic trim work on a vaulted ceiling isn't the way to go.

I am confused , an architect is the pro you start with not add one in along the way . I have no idea why anyone would want this style of ceiling to add cost to heating and cooling for no purpose I can see. If you have no architect then where are the plans from? I guess its a good thing you didn’t ask for a critique on the plan that would have really been interesting.

" . . . and the way I will go once that time gets closer . . . "

You have already past that point in time. Take a list of all your wants and needs in a home, a survey of your site, and your spouse to a local licensed architect and start the design process. Do not show the plan you currently have to them, but hide it away. Once you have worked out a design with the architect, compare your original design with the one you and the architect came up with and determine which one you want to live your family's life in.

@Colby I’m not of any help but I will say the ceiling in question is very common for the midwest in tract houses. I would guess because it provides the illusion of space. I have never seen any accented with casing however.

You will likely receive better feedback if people can understand where you are coming from. Are you using a builder with a set plan? Have you started framing already? The approach to your ceiling depends a lot on if it already exists or not.

In my opinion, crown molding doesn’t look very good along vaults. I am in the Midwest, and it seems like a lot of builds skip the crown molding throughout. Think of crown molding as a big piece of jewelry and a vault as another large piece of jewelry. The 2 together become compete for attention.

If you want crown molding, it can be done at an angle to continue along the vault line or it can bypass the vault. Then, it is just a matter of what type of crown molding you use.

I was confused about what you were asking but I think that I get it now?

You want to define the space between the great room and dining room by adding a wall with a large cased opening?

If so, that's really easy to add during the framing stage (although it's easy enough to do even after a house is finished.) With this floor plan, I think it is a really good idea. It will define the space and give you some wall space that will facilitate furniture arranging and areas for art work, etc.

And still feel open-ish and give good flow. (As well as support for the ceiling structure above.)

Minimal expense to frame (but the millwork to case can get pretty expensive.)

Thanks everyone for the comments.

I have a builder, have already completed the design stage with our designer, and am digging the foundation in a few days.

I turned down their casing/molding upgrades because they were so expensive, and am past the point of making changes, so I essentially have nobody to work with, until I hire a pro to come do it afterwards IF I decide to make those additions. Our neighbors did something similar for a better price after their build was completed, though their interior was different.

I think you'd need the 'stub walls'. you can see in these photos to support the casing, but I can't see this with a vaulted ceiling. BTW, uncased doorways will accumulate ugly 'dings' in no time.

This one doesn't show any casing added yet, but it is similar to what I think you want to do. You can have the builder do the drywall and then add casing later yourself.

http://pleighinghouse.blogspot.com/2015/07/ch-ch-ch-ch-changes-cased-opening.html