Forums >> Revit Building >> Technical Support >> @WWHub or @Typhoon -- Dormer cuts - "Not fully defined"

ijustwantalight11

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Hi guys,

I'm having a frustrating problem with Revit dormers and I trust your expertise to work through this.

Basically, I have a shed dormer centered between two gable end dormers (see attached img). This was created as a single roof.

I attach this to the main roof and try to perform a dormer cut. No matter what I do, it seems to tell me it isn't fully defined.

Even trying simple changes, such as flipping the cut the inside or outside of the wall doesn't change anything. I've tried to break the wall up between the first floor & second floor.

I've also tried simply using a vertical cut as a work around, but then I can't join the roofs.

Any ideas?? 

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ijustwantalight11

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*** Revit '16. 

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WWHub

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You are really only cutting the main roof so move the shed and two dormers out somehow then make your cut.  I typically did not use a dormer cut and preferred to cut with a void.

PS - I think you can just add this sketch to your original roof sketch - just set all of your sketch lines for this to be no slope defined.

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ijustwantalight11

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Thanks for answering Hub.

I have tried to change the main roof's sketch but then it yells at me that it misses the face *sigh*

Vertical has the same result. Maybe if I funk with it enough it'll work, but interior geometry is important in this case :/

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WWHub

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"Missing the face" - huh?   I don't see how you would get that message with a roof sketch.  A dormer sketch maybe.

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ijustwantalight11

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Sorry it tripled posted lol.

If I try to use a vertical cut or cut out the profile in the roof sketch with no slopes, I can't join use the join roof tool. That's when it'll tell me it misses the face/target and can't join (I'm selecting lines where they meet & copying to selected levels). 

It's sort of an odd join, but I just don't see why Revit can't do it. I'm getting back into it now so we'll see if I can figure something out.

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ijustwantalight11

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Update:

I got it to cut with the dormer tool with a lesser slope on the shed dormer and just raised the offset from level.

Still constrained but good enough.

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FANJUL78

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Hi,

I came across the same problem: Shed roof in between two gable end dormers - I could not cut the main roof underneath the shed roof because this would unjoin the 3 roofs to the main roof (asphalt).

The only possible solution I have found was to copy and paste the main roof at the exact same location and then convert the original (the one that's joined to the gable end & shed roof) into a "Sloped Glazing roof". That way I can preceed to cut the geometry by using the vertical Opening tool to the new Main roof without unjoining the rest of the roofs. You may use the same tool to cut the portion of the gable roofs under the shed roof as well. The last step will be to set the Sloped Glazing roof type properties to Empty System Panel : Empty

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