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IFC export from SketchUp - Best Practices

3D models from SketchUp Pro are exported to IFC as a set of IFC objects. In order to become an IFC object, surfaces and edges should be grouped or combined into a component. A group or a component should have an IFC type assigned (for example IfcSlab). 3D geometry that is not grouped or made into component, and lacks the IFC classification will not be included in exported IFC file.

If the object or group has a classification assigned, customised Description and Name properties will export to IFC.

2D lines and 2D objects without any face don’t export to IFC; objects must be created with a face and it is important that the exterior of the modelled object consistently consists of the ‘front’ (white) face.

By default, SketchUp will export your IFC with one-sided surfaces. If complex geometry or intersecting volumes are involved, the normals of surfaces might get random directions, which would appear as “holes” after export. With each new export of the same file, it might randomize normals again.

 

To prevent this from happening, click “Options…“ when exporting the IFC file, and make sure you have “export double-sided surfaces“ checked.

To access the First Person view in Tridify Viewer, exported IFC file should contain objects with IfcSlab and IfcBuildingStorey classification.

If you want to partially export your SketchUp project to IFC, first hide irrelevant elements and then when exporting, make sure “export hidden geometry“ is not selected.

For best results in IFC export from SketchUp consider using IFC Manager Plugin

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