In this video, you can see how you can play with IFC linked elements inside the Dynamo to find the thickness of the Wall.
You will also be able to see (from the Dynamo side) what difference we have if we are using the Revit linked file of the IFC linked file for the same elements.
The methodology shown in the video I did use in the case when I need to create openings for the MEP elements (in the MEP model) and I can not rely on the IFC element parameters.
Please make sure that before you start using this script you back up your existing project model.
Also, if you want to download this (and all other scripts) with my sample files please visit the Shop page.