> Brick is just siding. What's the frame made out of?
For brick an mortar houses, the "frame" is also made of brick[1]. All the walls are load-bearing, so there is no actual frame + siding: just brickwork. You have a concrete foundation, then you lay your double-thick brick-walls (for all load-bearing sections - all of the outer walls that are expected to support roofing trusses). Internal walls can be a single-brick wide. The only place timber is used is for roofing.
For brick an mortar houses, the "frame" is also made of brick[1]. All the walls are load-bearing, so there is no actual frame + siding: just brickwork. You have a concrete foundation, then you lay your double-thick brick-walls (for all load-bearing sections - all of the outer walls that are expected to support roofing trusses). Internal walls can be a single-brick wide. The only place timber is used is for roofing.
1. https://en.wikipedia.org/wiki/Brickwork