Jo_Ann

I would get rid of the terrain walls. Instead, (on level 0) draw 3 solid half-walls, forming a "room" extending off the foundation wall. Open each half-wall and set it's thickness to match the foundation walls. Choose your railing height and then set your wall material. Open the room dbx and set it's room type as a slab (make sure roof / ceiling over this room is not selected). I would also set it's floor C to be about 4" lower than the door in the foundation wall. Add a doorway where the steps will be. Back on level 1, (assuming that is where your terrain perimeter is), draw a terrain hole over the "room" (terrain>feature>terrain hole). Back on level 0: draw a stair landing, and drag it into the doorway (make it look like a slab). You need this landing so that the stairs will snap to it. Add the stairs.

Start with a tall kitchen cabinet. You will need to eliminate the doors and shelves. You will also have to delete the crown molding and the top separation from the cabinet. If you don't want the toe kick, delete that too. Make the empty cabinet the length you want, and then place the long end of the cab slightly extended into the wall. Copy/paste the cab. Rotate the new cab and extend it's end, fully over-lapping the other cab, and with it's long end also slightly extended into the wall. Re-add the crown molding to a soffit sized correctly, OR use a custom countertop with molding added (and then size and shape the countertop to the shape of the tall cabinet). You can block the molding pieces to the cabinet. The only thing left to do, is to add a closet shelf (with pole and hangers). You can block that to the cabinet, too. It might sound like a lot of steps to do, but it really is quick and easy.

All you needed to do was to open the room dbx, and specify "roof over this room".

Is there some reason you're not using the the polygon shaped deck tool, listed under the build>railing and deck> polygon shaped deck?

No.

They are attic walls, and they usually generate automatically.

Here is another example. Once you get familiar with the manual planes and how they intersect / react with the walls, it will get easier to modify your roof. I DO hope that you post a jpg of the finished roof, when you're done.

This is done using manual roof planes. Start practicing. Was the center section intended to be raised or lowered from the sides? Not enough information.

Does this look like what you are trying to do?

It would be beneficial for you to post the plan file.

A "landing" is not a "room", and you can not set it as "open below". Only "rooms" can be set as "open below".

Questions: 1. Is the ceiling height in the main house 9' ? (that is how it is set in your plan) 2. Do both baths in the addition have flat 8' ceilings? 3. What is the roof pitch for the main house (unlikely to be 2.5"/12, more like 6/12)?

Your best option is to manually draw the roof plane, and it will look better too. Start at the back of the house with a plane, then drag/extend the plane to the front of the house. Grab the break line tool (keyboard #3) and start putting break points on the plane, so that you can shape the roof to the house. Remember, the roof HAS to slightly overhang the exterior wall finish! When you're done shaping, open the plane and set the desired pitch. Remember to check that "auto-rebuild attic walls" is working (attic walls in the pic are set to pink, for better visual).

A little bit of re-thinking a plan, goes a long way.

Those plans were all modified by Keith.

The brick material you see isn't being hidden because the crown molding leans outward. There is no 'cap' on the top of the crown molding, and no ceiling to hide what is behind it. Give it a 'cap' with a box shape (blue, in the pic). Don't use a soffit...it will give you trouble.

If you added west and east exterior walls on the 2nd floor showing in your 3rd pic, (completing the rectangle with the 2 existing walls) then you did not form a 'room'. Those 2 existing walls (north & south) are attic walls. Either draw over them, or change their settings.

This seems like such a dangerous staircase. It needs a landing midway, for safety. However, to do what you want...I would 1st make all 3 exterior floor walls invisible, so that you can see what you are doing. Delete the floor 1 stairs. Delete the 2nd floor extended room (used to connect the stairs?). Open the staircase and use the settings that are shown. Move the stairs into the correct position.

By using a combination of cabinets, shelves, and box shapes (open front & back), you can assemble most anything. Once created, use the "edit area" marquee to select and move everything together, OR... In the 3d window, hold down control, select ALL components, and then block them.

1. I see 4 walls (not 3) in my diagram. Upload your plan with your best efforts currently done, so that it can be seen what you have (or have not) done. 2. Solver (Eric) answered your pitch question.

The plan that you posted is incomplete. You created a 2nd floor, but there are no definable rooms. Roof settings on some of the walls are wrong. Initially, temporary ceiling heights determine where the roof eaves sit on the walls. Non of this info is available. This roof is easy to auto-build, when given with the correct information.

If you want help with something, you need to post in Q&A.