Can't draw strait space separator lines inside walls

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I've done this many times before, not sure if this is some bug introduced in Revit 2025, or I forgot how I did it before.

But anyhow, I'm using spaces to calculate volume of buildings, with space separators placed where law in my country requires it.

But on this project space separators keep moving them selves at an angle once trimmed with other ones. Or  overshoot where they should end.

Here's a video of the issue.

I can't share the entire project, maybe just some walls if you think that would help in diagnosing the issue.

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Bump. Anyone?

[ToanDN]

When you draw the line, untick automatic area rules or something sounds like that.

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@ToanDN wrote:

When you draw the line, untick automatic area rules or something sounds like that.

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Space separators don't have it, just area boundaries.

[azad.Nanva]

could you post this part of your work and what is this element ?

[azad.Nanva]

did you try to unjoin the wall ?

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@azad.Nanva wrote:

could you post this part of your work and what is this element ?

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Here it is. I couldn't get the file bellow 71MB, here's a link on box.com, hope that's OK.

https://app.box.com/s/79e1um53rmui6cyzu0yqsqctmjj1pf8m

If you look at "Volume" floor plan currently one space separator is skewed, I had them all set up properly (with those "overlaps" at lines ends) but it got messed up again because we moved some windows 😕

The element you marked is a concrete column, needed to connect new addition to existing building. Shouldn't have any affect since it's not connected or joined to anything.

I just tried unjoining the walls, doesn't seem to help.

[azad.Nanva]

Why your Spaces are in another phase in Volume ? Why not in New Construction to act as Automatic ? or your Space separated and the wall ? i can not recognize the phases and act of them.

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@azad.Nanva wrote:

Why your Spaces are in another phase in Volume ? Why not in New Construction to act as Automatic ? or your Space separated and the wall ? i can not recognize the phases and act of them.

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Because we are required to have volume drawings as schematic drawings (by law). They have to look like this (with addition of dimensions and tags...).

So the way we do it, to avoid cluttering the model and make plotting easier, is to create two phases before anything else, "Volume" phase on which we create everything for volume and "Volume Demo" phase where we demolish everything to do with volume.

Why not in New Construction to act as Automatic ?

Not really sure, I'm guessing what is automatic in Revit will not be what is required by law in my country. We have different rules if the building is new, if it's existing, if the roof is sloped or flat, if terrace has a roof above it or if it doesn't... Manually placing space separators is the best way to make sure we follow all of them.

[azad.Nanva]

Yes, I agree with you that the view is more for the American and English work style, but I think this is not a good way to manage work, but I am trying to help, so :

the space separation line or room separation line use the rules of wall,this is fault of Revit rules but there is.
why you don't make the Volume after New Construction?or use the Area instead of Space?

[azad.Nanva]

I want to have a clear view of your work!!

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@azad.Nanva wrote:

why you don't make the Volume after New Construction?

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I guess, we could? As long as the phase filter is set to "show new" the resulting drawing should be the same. But would that change anything in terms of space separators behaving erratically?

or use the Area instead of Space?

Areas? But areas don't have volume. We're doing it with spaces because that's the easiest way, that I know of, to get the volume when you have some crazy insane roof. Then just place space bellow it and drag it up above the roof. Roof acts as space boundary and all is well.

[azad.Nanva]

i use the generic model for volume, i think your way for calculate the volume is too hard and have the many effect,i post a video that maybe help,i use the Wall Joins and Disallow Joins and join command in the end. but this is not solution.

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@azad.Nanva wrote:

i use the generic model for volume

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Yes, works for simple buildings, but again, complex roofs are a nightmare to model as a generic models.

[azad.Nanva]

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@azad.Nanva wrote:

i use the generic model for volume

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Yes, works for simple buildings, but again, complex roofs are a nightmare to model as a generic models.

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😂😆

post one of your nightmare model , i can try it.

[azad.Nanva]

for the last try:

if you make the Volume phase after new you can make the space or room to automatic to core layer :

change your phase as :

check your Area and Volume Computations to At wall core layer:

change your wall layer :

and you can have this :

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@azad.Nanva wrote:

check your Area and Volume Computations to At wall core layer:

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Unfortunately can't do that either, I need room area calculation to be at wall finish, and I can't move wall finishes to wall core because we dimension wall cores, and that would make it way harder.

For now i "solved" it by not trimming space separators, leaving them to overshoot one another. Not the prettiest solution, but there it is.

As for "nightmare" roof, they're usually something like attached file, some more complex some little less.

[azad.Nanva]

I don't know your rules for Volume and how you calculate it,but this is not nightmare.just you need to more practice.

 almost in twenty minutes.

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@azad.Nanva wrote:

I don't know your rules for Volume and how you calculate it,but this is not nightmare.just you need to more practice.

Seeing all those voids is enough to make me not want to do it 😄 I hate voids with a passion.

But could you share the model, I'd like to examine how you do it.

almost in twenty minutes.

Ouch, and to think this is literally a five minutes job in 3dsmax.

[Sleepingfish_Kuo]

I had the same problems in my country.

I use areas to count the area in law and rooms to get net area or volume.

To do that more automatically, I create two bool parameters to check each wall is using side/center/not using in the area counting.