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Tool Guides · 2026-06-03 · 9 min
Why Your Revit IFC Export Breaks (and How to Fix Each Cause)
The geometry exported fine last week. This week elements are on the wrong floor, walls are missing, and the whole model is sitting in the wrong place. Revit IFC exports break for a handful of predictable reasons — here's how to identify which one bit you, and fix it.
Why Your Revit IFC Export Breaks (and How to Fix Each Cause) — IFC Viewer Online article cover
"My Revit IFC export breaks" is the single most common complaint in BIM forums, and it's frustrating precisely because it's vague — 'breaks' can mean geometry on the wrong level, missing elements, distorted shapes, or a model sitting kilometres from where it should be. Each of those has a different, identifiable cause. This is how to tell them apart and fix the right one instead of guessing.
Start by confirming what actually broke. Open the exported IFC and look: is the geometry distorted, or just in the wrong place? Are elements missing, or just on an unexpected storey? The answer points straight at the cause.
See what a clean export looks like
Open the buildingSMART duplex to see correct geometry and spatial hierarchy, then open your own broken export and compare — the difference usually makes the cause obvious.
IFC2x3 · 2.4 MB
Open the interactive IFC viewer
Cause 1: Geometry Lands on the Wrong Level
If an element sits on a Revit level that isn't marked as a Building Story, the exporter pushes it down to the next story below — which is why things appear on unexpected floors. Revit only treats levels flagged as Building Story as real storeys in the IFC spatial hierarchy.
Cause 2: You Opened the IFC Instead of Linking It
When you open an IFC in Revit, it tries to recreate native Revit elements from the IFC geometry. That works for simple walls and quickly falls apart on complex geometry — curved surfaces, intricate families, anything non-trivial gets mangled. When you link an IFC instead, Revit uses the translation framework to create a clean reference model, and you can update the link when new files arrive.
- Open (Import): use only when you genuinely need editable native Revit elements and the geometry is simple.
- Link: use for coordination and review. The geometry stays clean and updates non-destructively.
Cause 3: The Whole Model Is in the Wrong Place
If the exported model sits far from the origin — or the geometry looks subtly distorted — it's a coordinate problem. IFC is imported according to Revit's Internal Origin regardless of the Project Base Point and Survey Point, and geometry placed far from the world origin can distort due to floating-point precision. This is its own deep topic; the short version is to export with Shared Coordinates and keep the model near the origin.
For the full survey-point / base-point / georeferencing breakdown, see IFC Coordinates Are Wrong in this blog.
Cause 4: Elements Are Missing or Became Proxies
Two related failures. Elements can vanish if they lost their host storey on export (they become orphans most viewers skip). And Revit families without an IFC class mapping export as IfcBuildingElementProxy — they're technically present but typeless, so downstream tools treat them as generic blobs. If more than a few percent of your model is IfcBuildingElementProxy, your export mapping table needs attention.
Cause 5: Properties or GUIDs Came Across Wrong
If the geometry is fine but the data is wrong, you're looking at the two other classic export failures: missing property sets and regenerated GlobalIds. Both are common enough to have their own guides — see IFC Properties Missing After Export and Why IFC GUIDs Change on Every Export in this blog.
The Diagnostic Workflow
- Export to a local folder — never straight to the CDE.
- Open the IFC in a validator and look at the 3D result before anyone else does.
- Wrong floor? Fix Building Story flags (Cause 1).
- Mangled geometry on import? Link instead of open (Cause 2).
- Model far away or distorted? Shared Coordinates + near origin (Cause 3).
- Missing elements / too many proxies? Fix the IFC mapping table (Cause 4).
- Run validation, target Health Score ≥ 80, then deliver.
Why Your Revit IFC Export Breaks (and How to Fix Each Cause)