Bug : Roof exported as thin layers
- Dominant language
- C#
- Stars
- 637
- Forks
- 225
- PR merge metrics
- No merged PRs in 30d
Description
# System info
Revit 2021.1.1
Revit IFC 21.1.0.0
Windows 10
IFC schema : IFC4
MVD : Reference View
# Description of the issue
Multilayer Roof exported as thin layers :

Also roof do not provide any IfcRelSpaceBoundary when it bounds a space.
# Minimal file which produces the issue
Attached file contains both .rvt and .ifc file : [RoofBug.zip](https://github.com/Autodesk/revit-ifc/files/5498238/RoofBug.zip)
Contributor guide
Research direction
Start with the attached RoofBug.zip, comparing its .rvt input with the exported .ifc under the stated Revit and IFC versions. Done means the multilayer roof retains correct layer thicknesses and provides an IfcRelSpaceBoundary when it bounds a space.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- csharp
- Domain
- desktop
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100