[roofs by form: exterior shape]butterfly roofsflat roofspitched roofsrainbow roofssawtooth roofsumbrella roofsconical roofsphaṁsa-kapōtasamakṣiptasūcikaxiēshān zhuǎnjiǎobù shàliǎngtóucuánjiānshàliǎngtóuyìngshānxiēshānchūjìroofs by form