solver

You might begin by watching the last video I linked above. Start by creating an accurate model of the existing house. All you need are walls and roof. Resist the urge to fill it up with cabinets, cars, pictures on the wall, electrical etc. Once this is complete, copy it and add the structure of your addition. I'd learn manual roofs and not try to use the automatic roof builder. See the links above and I have a Roofs playlist on my YouTube channel, and David Potter has many more on his channel.

Holding Control while dragging overrides movement restrictions.

Changed material: Untitled 5.calibz Watch on YouTube: http://youtu.be/ql8jSsRed1I?hd=1

And add a saved camera that i can use to see the problem.

Draw a new, one room plan using your problem floor material. Attach it (close Pro first) and I'll have a look.

If you tell us what you are doing, and show a screen capture of "all weird and funky" someone might be able to give you some suggestions. See the links posted above for articles and videos, and i think I have a shed dormer video on my channel. The simple answer is with Pro and its roof tools (auto and manual), what you show should be simple.

Built roof framing, increased the size and length of a rafter. You get proper grain patterns if that's important.

It would help to have pictures showing what you are trying to model. Have you considered a Sloped Soffit? They are often used for exposed beams. Check Help, the HD website etc for more info.

You can edit the size and shape. Open it and change parameters, or view in elevation and make changes. No moving to a different layer in Home Designer.

Try modifying a rafter or other auto generated framing member.

Talk to whoever approves your plans about garage floor heights. Here they need to be dropped and sloped.

Even Suite lets you Include/Exclude a room for the living area calculation.

Don't see the plan file. Need to close Suite before attaching.

Don't give the garage a room type of Garage.

You just need to read/watch videos etc on how to set the pitch in wall specifications.

You need a Material to represent the soldiers. See the website for how to articles. Use a Custom Backsplash or Soffit as a base for your new material.

I'm guessing you have an image of your lot that you want to trace. You need to scale the image first. Go to the Home Designer website and search for trace. Temporary dimensions are not disabled in the trial. Here is a video that goes over using temporary dimensions to draw a plan. Watch on YouTube: https://youtu.be/Po5mVf5QnO0

Draw a wall in plan, open it an go to the Roof panel, review the various settings.

Yep.

If you are doing manual roofs, the Baseline is something you need to understand -- where it is, what effect it has on how the roof builds etc. Geometry, probably. And your roof should easily auto build -- have you tried?

Watch on YouTube: http://youtu.be/xKylhyQBKyA?hd=1

Attach the plan file.

Select a roof plane, look in the Edit Toolbar.

That's what you do. It's common to show the outline of exterior walls in a light color, main layer only, no fill etc, or even dashed too.