solver

It's still important to know which software you are using. You don't raise the height of a wall, you raise -- or lower the ceiling height, and the walls follow. Ceiling height is set in defaults, but may be overridden on a room by room basis. And, if you are on Windows, and a Mac may have the same, you can Sleep or Hibernate you system instead of doing a full Shutdown. This lets you keep your drawing alive instead of starting over each time.

Review Object Information in an items specification dialog. Check the 3D Warehouse or other sites for a symbol of your new radiators, or create one of your own with SketchUp. You cannot draw lines on a soffit, but you could make a very small soffit, give it a unique color if required, and place it against another soffit. If you do this, block the items together for ease of movement.

Not sure which plan you are using, but make sure you are changing the uppermost floor walls.

There is always the option of using solids -- a soffit, slab, or one of the shapes from the library. A fence with 1 window would require 4 pieces. Not difficult to do if you know the dimensions you want.

I'd ask your local code enforcement people. No matter what the code says, they are the ones that will sign off on the plan and construction. https://codes.iccsafe.org/public/

The north side of my house will have snow and ice a foot or so up against it much of the winter. New construction requires siding to be 8" above the earth. In areas prone to termites, an exposed foundation makes their tunnels easy to spot. There are many, many metal buildings where the siding runs to concrete or asphalt. The slab is raised an inch or so forming a rabbit for the siding to sit on.

The floor camera is mostly useless -- read up on it in the documentation to understand how it and the other cameras operate. Use the Full Camera.

I always suggest to someone wanting to learn the roof tools available in Pro to start by experimenting. Draw a one room structure. Auto build the roof, then move the roof planes around. Change the default hip to a gable. Add a room forming an L or T shape structure. Draw roof planes manually and try to connect them to the existing roof. Like a slab, a roof plane is bound by a polyline with edit handles you may grab and move. Work in a camera view so you may see what is happening. I like a Technical Illustration with patterns toggled off (under the 3D menu). As for the video, I was suggesting following it from beginning to the end, as I believe they construct the house before building the roof.

Here are some videos to get you started. https://www.homedesignersoftware.com/videos/watch/10141/home-designer-beginning-roof-design.html?playlist=200 And I'll suggest practice. Draw a one room structure. Draw a gable roof, then a hip roof. Add a room creating an L shape and add a roof over it so it connects to the existing roof. Work in plan and in a camera view -- i do most initial work in a camera view, then cleanup in plan.

There is only the complete plan. https://www.homedesignersoftware.com/videos/watch/10141/home-designer-beginning-roof-design.html?playlist=200 I believe the video shows building the complete house prior to starting the roof training.

The plan you posted does not match the images, but in either case, that's a simple roof to fix manually. You really should take the time to learn the manual roof tools. I'm sure I have linked to the YouTube videos from Chief, and DJP (David Potter) also has a bunch on YouTube.

Import a picture, scale and position as required.

Give what I said above another try. Three invisible walls to form an Open Below room. Short walls set to Full Gable. Set the roof overhang to 1" and adjust the wall so it aligns with the one above.

Don't match how?

Is this wat you want?

You want the small roof section? Roofs build over rooms. Create a room -- invisible walls, open below etc, along the front wall.

Always check the Knowledge Base

Visible where? In plan, in a camera view? What are you trying to accomplish?

You want the jamb to be 2"?

Delete the two highlighted walls and the roof plane goes away.

Yes, posting your plan file is what I was wanting. There are so many interrelated settings it's really the only way to look at many problems. As for your roof. It is caused by the raised ceiling -- above the dining and below the master. I don't know why the roof is generated, and I don't know what you are wanting to model -- your ceiling heights etc, so cannot be much help.

Give your porches a Room Type -- like porch. Then redimension.

Please check you signature -- it's not showing. Start by removing all the roof settings in walls. Edit>Reset To Defaults Start at the left end and one by one, set the walls to Full Gable and High Shed Gable. Drag the wall across to the right to close the gaps. I extended a couple of walls, but not sure it's needed.

You should contact support at Chief Architect directly for this type of problem.