I can draw the roof but cannot get it to raise. it is not a pyramid hip roof, as there is a straight spot 10’ feet long in the middle.
Select only your middle ridge line, and with the ‘Move’ tool… Move the line UP along the z-axis (blue-axis).
In it’s simplest form, just use the follow me tool. Make a face with the desired roof pitch and use the tool as below.
All about roofs…
Roof Modeling Video Tutorials by Aidan Chopra
Complex hip roofs and the Follow Me tool
Using Intersect with Model to make roofs
Making hip roofs
Creating eaves for buildings with pitched roofs
Constructing gabled roofs
Building flat roofs with parapets
Cheat, save yourself, get the Valli Architects’ “Instant Architecture”. There are more steps than shown below in other responses. You can pretty easily do it yourself, too. Eh, practice both. Instant Roof is part of Instant Architecture (as is instant window, instant door, instant road, instant fence/wall and others). Go to extensions and type “Instant Architecture”.