In Dataset Explorer copy the slab part to your project dataset, rename it with the suffix _Insulation.
In the Cut Patterns definition:
Tick in the Pattern column
Change the Pattern type to Patterning
Set the pattern cell to 'baten' (this should be available, I think it is in all datasets)
Set the pattern size to maybe 0.25, you will probably need to play around with the size to get it right