TFP uses a default framing structure (wood), but of course, you can customize the options.
Walls: right click on the exterior walls => Framing Properties => select the desired options.
Roofs => in order to create trusses => use one of the ready to use shapes (first icon in the Roof tab) => right click on the roof => Framing Properties => select the desired options.
If you have the Professional or the Deluxe versions, you have additional Framing options and tools in the Framing tab.
If you are interested, my eBooks include an entire chapter about Framing => see link below (in my signature)