I’ve traced a plan with the intention of extruding the walls and making a 3D model. Im a beginner at Sketchup and have made a few 3D models before but not in this way. I’ve got stuck and can’t seem to find a way forward. When i’m looking at the plan from the top, the inside of the room is highlighted too, and whereas normally I can select it and delete it, this time it selects the walls too. I presumed that this was because somewhere the walls aren’t meeting properly but I’ve had a good look and can’t figure it out. I’ve attached the model and would be so grateful for any help.
Download link: https://we.tl/41epVadbio