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Foam shape below roof overhang doesn't model correctly as fascia or wall sweep

19 ANTWORTEN 19
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Nachricht 1 von 20
mgmueller
1126 Aufrufe, 19 Antworten

Foam shape below roof overhang doesn't model correctly as fascia or wall sweep

I have a metal insulated roof at 3:12 pitch.  Under the overhang there is a foam shape attached to the wall.  This will not model correctly as a fascia, since the fascia attaches to the end of the roof, not the wall.  So I tried to make it a wall sweep (component).  On eves it looks fine, but on the gable ends it's cocked at an angle.  What's happening and how can I fix it?

 Fascia eave.pngfascia gable.png

19 ANTWORTEN 19
Nachricht 2 von 20
barthbradley
als Antwort auf: mgmueller

"Angle" not working for you?  See Fascia Properties.  

 

Fascia126.png

Nachricht 3 von 20
RDAOU
als Antwort auf: mgmueller

@mgmueller 

 

I would use an Adaptive Component with Orientation to follow "Global Z then Host XY"

 

Otherwise use separate Fascias/Sweeps for the eves and the gables then clean up the corners

 

 

 

 

 

 

 

YOUTUBE | BIM | COMPUTATIONAL DESIGN | PARAMETRIC DESIGN | GENERATIVE DESIGN | VISUAL PROGRAMMING
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Nachricht 4 von 20
mgmueller
als Antwort auf: barthbradley

If you change the angle of a fascia it changes them all, not just the one on the gable end. Besides, I'm not creating this as a fascia, but rather a wall sweep.
Nachricht 5 von 20
mgmueller
als Antwort auf: mgmueller

I'm afraid I don't know how to create an adaptive component and I'm not sure how it applies to my specific need.  I tried to create one but then could not extrude it along the path of the top of the wall at the eave and gable ends.

 

I did make separate sweeps per your suggestion but I don't see how to clean up the corners.  Any further advice you can give me would help.  This is what I have:image_2021-12-07_151341.png

Nachricht 6 von 20
barthbradley
als Antwort auf: mgmueller


@mgmueller wrote:
If you change the angle of a fascia it changes them all, not just the one on the gable end. Besides, I'm not creating this as a fascia, but rather a wall sweep.

 

Okay, so use separate Fascias and then Model In-Place the corner return.  Pretty much how it will be constructed in the field.  Probably going to require a custom pre-fab. That's where you come in with the plans.  

Nachricht 7 von 20
ToanDN
als Antwort auf: mgmueller

Can you share the profile family?

Nachricht 8 von 20
mgmueller
als Antwort auf: mgmueller

OK

Nachricht 9 von 20
ToanDN
als Antwort auf: mgmueller

Like this?  I use a fascia, not a wall sweep.

Revit 2022 file (I don't have 2021).

 

ToanDN_0-1638932783511.png

 

ToanDN_0-1638933302072.png

ToanDN_1-1638933325823.png

 

 

 

Nachricht 10 von 20
barthbradley
als Antwort auf: mgmueller

Nachricht 11 von 20
mgmueller
als Antwort auf: mgmueller

I don't have Revit 2022.  I tried to place the profile as a fascia, attached to the bottom edge of the roof, then moved it horizontally so it's under the eave.  This worked on the gables but not the eaves, where the shape was tilted at the roof slope back into the wall.  How did you get your fascia to do that????

Nachricht 12 von 20
mgmueller
als Antwort auf: ToanDN

I don't have Revit 2022.  I tried to place the profile as a fascia, attached to the bottom edge of the roof, then moved it horizontally so it's under the eave.  This worked on the gables but not the eaves, where the shape was tilted at the roof slope back into the wall.  How did you get your fascia to do that????

Nachricht 13 von 20
ToanDN
als Antwort auf: mgmueller


@mgmueller wrote:

I don't have Revit 2022.  I tried to place the profile as a fascia, attached to the bottom edge of the roof, then moved it horizontally so it's under the eave.  This worked on the gables but not the eaves, where the shape was tilted at the roof slope back into the wall.  How did you get your fascia to do that????


 

- The fascia profile should not have a sloped top.  The sloped top only happens at the eave sides, not the gable sides. 

- Create another roof with a smaller footprint (matching the wall perimeter, no overhang) to host the fascia so that you don't have to move it.  Hide that roof when done.

- if you care about the flat top fascia protruding in the roof above, create a void extrusion in place to shave off the  top portion of the fascia on the eave sides.

Nachricht 14 von 20
mgmueller
als Antwort auf: ToanDN

Thank you, that seems to have worked.  However, it seems to be a workaround.  One would think this would be a pretty basic need in Revit modeling.  

 

Also, I used the "cut profile" command on the view tab, graphics panel to modify the top of the profile at the eave.

Nachricht 15 von 20
ToanDN
als Antwort auf: mgmueller


@mgmueller wrote:

Thank you, that seems to have worked.  However, it seems to be a workaround.  One would think this would be a pretty basic need in Revit modeling.  

 

Also, I used the "cut profile" command on the view tab, graphics panel to modify the top of the profile at the eave.


Yes it is a workaround. 

I forgot to mention that you can keep the 'ghost' roof in a previous phase and demolish it, or move it to a future phase, the fascia still remain independently from that roof.  That would keep you from manually hiding the 'ghost' roof.

Also, Cut Profile is 2D only and per view but if it works for you then that is good.

Nachricht 16 von 20
barthbradley
als Antwort auf: mgmueller

Just make your Roof a Two-Cut Plumb and path the Fascia along the bottom edge of the Roof. Then enter a negative Horizontal Profile Offset value equal to your Overhang.  Bada Bing.

 

It's not a workaround. 

 

BTW: Don't slope the top of the Foam Board Profile.  It's unnecessary and silly.   

 

Fascia 128.png

Nachricht 17 von 20
RDAOU
als Antwort auf: mgmueller


@mgmueller wrote:

I'm afraid I don't know how to create an adaptive component and I'm not sure how it applies to my specific need.  I tried to create one but then could not extrude it along the path of the top of the wall at the eave and gable ends.

I did make separate sweeps per your suggestion but I don't see how to clean up the corners.  Any further advice you can give me would help.  This is what I have:


@mgmueller 

use a void to trim edges at the corner 

RDAOU_0-1639047291146.png

  • You can apply the same principle using Roof Fascia tool -  Dummy roof and/or Plumb Cut Square are not required

Fascia 2.gif

 

 

 

 

YOUTUBE | BIM | COMPUTATIONAL DESIGN | PARAMETRIC DESIGN | GENERATIVE DESIGN | VISUAL PROGRAMMING
If you find this reply helpful kindly hit the LIKE BUTTON and if applicable please ACCEPT AS SOLUTION


Nachricht 18 von 20
mgmueller
als Antwort auf: ToanDN

I've tried all the other suggestions in this thread and yours is the simplest and least time-consuming.  Despite the fact that it's a workaround and it requires creating an element that has to be hidden or demolished. 

 

What I don't understand is why it is not easier to accomplish what seems to me to be a rather simple task.  I can't be the only one trying to make this particular shape perform this way.  Years ago, this kind of thing was simple using out-of-the-box AutoCAD with a sweep and a polyline.  I have been using AutoCAD since 1988 and I don't understand why Revit has to be so complicated and so un-user-friendly.

 

Oh, well, I need a rendering and this is the only way to get it using the tools that cost a small fortune for a small operation.  And going to all this trouble, I want working drawings out of it as well, no questions asked.

 

Yours,

Frustrated Fountainhead

Nachricht 19 von 20
ToanDN
als Antwort auf: mgmueller


@mgmueller wrote:

 

What I don't understand is why it is not easier to accomplish what seems to me to be a rather simple task.  I can't be the only one trying to make this particular shape perform this way.  Years ago, this kind of thing was simple using out-of-the-box AutoCAD with a sweep and a polyline.  


If you want to create it as a continuous sweep, you would need a small horizontal segment to transition the horizontal eave to the sloped gable:  a horizontal eave segment > turn corner > a short horizontal segment > a sloped gable segment.

 

ToanDN_0-1639170839746.png

 

Without the short transitioning segment, the sweep is likely to fail or distorted unless the profile is a simple circle.

 

Nachricht 20 von 20
barthbradley
als Antwort auf: mgmueller


@mgmueller wrote:

I've tried all the other suggestions in this thread and yours is the simplest and least time-consuming.  Despite the fact that it's a workaround and it requires creating an element that has to be hidden or demolished. 

 


 

 

I don't understand why you need a "workaround" when two-cut plumb accomplishes the same thing. Did you read and understand Message 16?  

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