Mainly because gable roofs are very simple, they're often accompanied by dormers, which rise vertically with the roof slopes to develop far more living Place and architectural curiosity. Multilayer technique: the addition of the plastic movie was the initial step to produce brick containers impermeable to liquids and heat-sealable. From https://share.evernote.com/note/1b425331-5c83-7454-6c1f-1b19e8da7916