It's a very good progress! Congrats!.
I'm happy you've read and follow my recommendations.
Are reflected on the results.
For the sides of the dormers you need some sloping walls.
You could calculate or you could approximate it visually in 3D view.
Personally I use the approximated measurement for the start and after that I perform accurate calculus.
For the roof windows you could simplify the task using the special library in place to made the hole manually even this it is possible.
I know I've write it in the manual but, meanwhile was released 4.5 and the roof windows library to simplify this task.
Don't let us (GRT) to think we work in vain for this.
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A computer program does what you tell it to do, not what you want it to do. Murphy's Law
When all else fails, read the instructions. Murphy's Law
If you don't like "AS IS", DIY. Dorin's law
