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Forums >> Revit Building >> Technical Support >> Roof Slope and Tapered Insulation

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Wed, Aug 12, 2009 at 2:47:54 PM | Roof Slope and Tapered Insulation

#1

haywood


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I am having trouble showing the tapered insulation correctly on a sloped roof.  When the roof is sloped using the slope arrow, I am not able to add points and adjust the heights.  I made a sloped reference plane thinking I could make an extruded roof and set it to the sloped plane, but I can not select that plane as an option.  Attached are images of what I'm trying to achieve.

 Any suggestions would be greatly appriciated.

 



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64312_Section.JPG64312_Plan.JPG

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Wed, Aug 12, 2009 at 3:05:01 PM | Roof Slope and Tapered Insulation

#2

haywood


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I see a bunch of these posts with no answers to them.  This is a basic function in building construction that is made extremely difficult in Revit.

 Update:  A friend of mine just did it in Archicad in two minutes and is now laughing at me.


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Wed, Aug 12, 2009 at 3:36:23 PM | Roof Slope and Tapered Insulation

#3

WWHub


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Do you want to model it or just change the profile in section?

 


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Wed, Aug 12, 2009 at 5:54:43 PM | Roof Slope and Tapered Insulation

#4

haywood


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I would like to model it, but I took a different approach and faked it.  On the roof plane, I drew model lines for the crickets and drains.  Then in the section, I drew in a filled region so the roof and joists are sloped correctly and then faked the tapered insulation.

I like to draw things correctly, so modeling it would be ideal, but after some thought, you would never see it unless in a perspective view from above or maybe a section box view.  For what I need, faking it worked out, but if you have modeling suggestions, I'm all ears.


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Wed, Aug 12, 2009 at 6:39:05 PM | Roof Slope and Tapered Insulation

#5

WWHub


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You didn't need the filled region in section.  Learn to use your edit cut profile tool for this model section.  You can edit the insulation layer to show exactly what you needed.

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Wed, Aug 12, 2009 at 6:52:32 PM | Roof Slope and Tapered Insulation

#6

haywood


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Wow, that's huge.  I only that on walls.  Never thought to try it on anything else.  That looks a lot cleaner and was a lot faster.

 Thank you very much.


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Wed, Aug 12, 2009 at 7:08:21 PM | Roof Slope and Tapered Insulation

#7

dgcad


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Modeled in under 1 minute. See attachment.

 

Tell your Archicad buddy any time any place : )



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64334_Tapering_Roof_with_Tapering_In-Place_Drainage.png

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Wed, Aug 12, 2009 at 7:19:30 PM | Roof Slope and Tapered Insulation

#8

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I model all my crickets, roof drains and piping. this is 1/4" slope on all roofs and crickets.

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Wed, Aug 12, 2009 at 7:54:49 PM | Roof Slope and Tapered Insulation

#9

haywood


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Thanks dg.  That's the look I was going for.  I'm obviously missing something because I can't get to modify points on a sloped roof, only on a flat roof.

Could you give me a quick lesson on how you did it?


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Wed, Aug 12, 2009 at 8:03:16 PM | Roof Slope and Tapered Insulation

#10

dgcad


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It's actually quite easy.

 

The main sloping roof is just a flat roof with slope arrow. That's no problemo.

 

The tapeing part is a single in-place family, roof category, solid 'sweep blend' then mirrored. Then join geometry or use linework tools to get rid of the seam line. 

(TIP: When roofs get tricky, break them into smaller more manageable parts)

 

Hold tight for video link. . . .


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Wed, Aug 12, 2009 at 8:30:18 PM | Roof Slope and Tapered Insulation

#11

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Figured you used an in-place ... because I thought I saw a membrane going through your wedge section Daryl ... would just have to edit cut profile that out.

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Wed, Aug 12, 2009 at 8:58:11 PM | Roof Slope and Tapered Insulation

#12

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Mines a little more tricky but functions quite nicely. I create my main roof deck with a 1/4 slope, then i create my crickets as a flat roof with variable insulation and modify my points to the correct elevation/slope. Lastly I have an inplace family in the roof category that cuts the slope out of the bottom of the crickets. I just keep the inplace family in a workset that is only opened with modifying that element. As a result I get perfect crickets and no of my coworkers are aware of the hidden inplace family.


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Thu, Aug 13, 2009 at 7:10:10 PM | Roof Slope and Tapered Insulation - Video Tutorial Added

#13

dgcad


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Ok below is a video explainng how to use a blend sweep to create the tapering roof condition.

 

Detail video > http://www.CADclips.com/downloads/Tapered-roof-insulation-with-sweep-blend.wmv

Click the link above to play the video online or right click and 'save targetr as..' to down the file.

 

Youtube version. . . a little slicker production > http://www.youtube.com/watch?v=qnqljpl9QEU 

 

One of the interesting things that hit me as I setup this video is if you start the in-place family 'sweep blend' in a particular view then switch views the 'workplane' does not switch. The workplane from the original view is persistant. I always knew this but never quite demonstarted it before. So you should always 'show' your workplane and confirm it is where you think it is as you model.

 

The bottom line is the 'workplane' stays from the 'original view' as you change your view from various plan views or 3d views etc. as you model. In regular project modeling when you switch to say 'Level 1 plan view' the workplane follows you. For in-place families it does not.



Edited on: Thu, Aug 13, 2009 at 3:42:45 PM

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Thu, Aug 13, 2009 at 8:12:19 PM | Roof Slope and Tapered Insulation

#14

haywood


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Thanks DG, that was awesome.  I never thought of the sweep blend.  Was trying sweep and getting my teeth kicked in.

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Thu, Aug 13, 2009 at 8:58:57 PM | Roof Slope and Tapered Insulation

#15

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Sweep blends are cool. It's getting the geometry straight in your head that can be tricky. Then it's all about managing your workplane(s).

 

Save yourself some headache and get used to always knowing what your workplane is, in each view, in project mode and family editing mode. Get used to creating reference planes and naming them so you can use them as work planes. It's like named UCS's back in the DWG. It was a happy day when they eventually brought in the DUCS !

 

I have edited my post above to include a Youtube version of the same topic. A little slicker and more concise video that can be easily linked. 

You can search Youtube for 'CADclip' and I have lots more videos up there.

 

My best advice with modeling REVIT roofs is when it gets too tricky break it down into smaller pieces. It doesn't matter it the roof is flat, sloped by footprint, by extrusion or by Face. Break it down if it's giving you trouble. Then you need to become the master of using 'join geometry', 'roof join' and 'Attach' top / bottom to bring it all together and cleanup.


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