I have drawn an existing building thats needs a renovation. In the project i need to add 100mm insulation to the external side of the outer walls. Are there any way that i can add theese 100mm to my existing walls but only show the new 100mm in new construction ?
You need to create the 100mm wall type and then locate adjacent to the existing wall type. you may have to join the two walls with the join command so that the existing openings, if any, cut through the new wall.