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Modify Sub-Elements on pitched Roofs/Floors

Flat roofs are often installed on pitched decks so that the majority of insulation is of continuous thickness.  Crickets are created around the perimeter by tapering the insulation layer for drainage and wrapping the membrane over the wall.  Revit however does not allow for modifying sub-elements on pitched roofs.

 

This sticks us with the task of modifying the entire roof from flat for both crickets and the primary pitch.  What's wrong with that?

 

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That's what's wrong with that.  Because parts of the roof end up below the base level NONE of the layers can be variable, so the rigid insulation can't be shown tapering properly.  We're left with an air space under the cricket that has to be filled in graphically.  Joins with walls also cause errors that can't be fixed by changing the join order.  Even if you try to build the roof out of individual segments you can't taper a layer from both sides. 

 

We need the ability to establish a base slope for the whole roof with the option to thicken portions where needed.

Comentarios
Enthusiast
Enthusiast

I just ran into this same problem.  I have a roof where the structure slopes in one direction and that slope is fine for the majority of the roof but I still need to add crickets to divert water around some parapet walls.  I hope Autodesk will correct this issue.  For now, I will just have to draw in crickets on my roof plan with lines.

Anonymous

This is crucial for tapering down rigid insulation when the roof extends beyond the conditioned building.

Participant
Participant

@Anonymous any help to problems above? This seems like simple stuff that should not require custom in place modeling, but I don't see any other solutions at this point since we cannot modify sub elements of a sloped roof.

 

The number of things I have to model in place due to Revit's limitations limits the ability to model parametrically, becoming harder to justify using system families in more and more of my projects.

Explorer
Explorer

We need to export in IFC 4 all materials included in the roof’s packaged and their own width.

this can be possible only with the creation of the parts inside the model, infact For FLAT roof (Without slope) it is possible to create the parts and each material and its width is exported , while if we apply a slope (by modification of Sub Elements and entering a variable thickness)  or if we create a pitched roof it is not possible to create the parts  and consequently we cannot export the width of each single material. for our work process this is a big limitation.