It will join in the wrong order and you will need to use the drop down menu next to join to switch the join order.
Revit cut roof geometry.
Then from the modify tab on your ribbon use the join geometry command and select the 7 1 2 roof and the wall.
Select the wall and use the attach top base button to attach it to the underside of only the 5 1 2 roof.
You can use model in place when you want to cut system families like roofs or walls.
When you create.
On a small scale side when cutting geometry the application expects faces and edges to be accurately aligned.
When you create a void it affects only existing geometry.
That s more like it.
To enable this open the revit family with unattached voids and click create tab properties panel family category and parameters.
In this case you can use the cut geometry tool to cause the void to cut solids that are created after the void.
Click modify tab geometry panel cut drop down cut geometry.
Another small scale requirement is that geometry cannot be less than approximately 1 32 0 79 mm.
Select the object to be cut.
Open the revit family with unattached voids and click create tab properties panel family category and parameters.
Load the family into the project and place it.
With the cut geometry tool you can pick and choose which geometry gets cut and which does not regardless of when you created the geometry.
Cut geometry with the cut geometry tool you can pick and choose which geometry gets cut and which does not regardless of when you created the geometry.
In the family category and parameters dialog select cut with voids when loaded and click ok.
Load the family into the project and place it.
Please note that this cutting of the geometry was only possible because we checked the parameter cut with void when loaded.
In the family category and parameters dialog select cut with voids when loaded and click ok.