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 offset from roof base.
To see the effects of this property more clearly set a value for plate offset from base other than 0.
If you choose truss the plate offset from base is measured from the outside of the wall.
See roof boundary line properties.
I m going to leave mine as it is.
To move the lower boundary above the base level enter a positive number.
Extend into wall to core specifies the overhang dimension from the roof edge to the exterior core wall.
This parameter is enabled when a line is set as slope defining and it is not associated with a wall.
Then from the modify tab on your ribbon use the join geometry command and select the 7 1 2 roof and the wall.
We want to move the ridge by 1 50 meters to left.
Offset from roof base.
Room 2 has a base offset of 1000.
If you want to adjust the height position of your roof then select the roof and in the properties panel you can change the base offset from level to do that.
The lower boundary of the room starts at level 1.
We used the formula.
To fix your roof select the edge of the roof that is lower in the sketch of the roof.
When you are sketching the roof revit assumes all lines of the sketch are at the same height.
For this we have to change the height of the right eave using offset from roof base at a negative value.
Example 1 a roof by footprint with equal slopes of 30 degrees.
Room 1 has a base offset of 0.
Select the wall and use the attach top base button to attach it to the underside of only the 5 1 2 roof.
To move the lower boundary below the base level enter a negative number.
If the eves are at the same height the overhang is the same and the slope is the same the ridge line will appear in the middle of the roof.
It is a matter of geometry.
For example in the following section view.