I'm totally new to this Revit modelling so please bear with me.
I have to model an existing building to include some refurbishment elements and an extension.
I can model the extention easily but am struggling with the refurbishment part. At the moment I have attached the 2D cad survey (no point cloud survey I'm afraid) and added my refurbishment elements in Revit so they are 3D. Is this good practice? There is no time available to model the building in 3D from the existing 2D Cad data.
Any ideas guys? I probably spend 50% of my time working on existing buildings with often 2D surveys so I would appreciate any thoughts or comments if I've taken a wrong turn somewhere.
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Off hand - I think you are working just fine.
If you don't have time to redo the entire existing building in 3D - stick with doing the referb portion in revit and using the 2d cad imported in.
If they want all of the building in 3d - then you can add that to the timeline and cost.
I agree with Lisa on how you are handling it now.
We do the same thing here. Link or Import CAD files into Revit and only draw 3D items close to the addition or remod area.
I also have placed room separation lines over the cad file so I can get room tags in Revit to look the same.