Why do houses in Tibet use iron sheets?

Mainly iron roofs, iron walls are generally very temporary or it is cheaper and more convenient to use iron.

In the past, it was inconvenient to enter Tibet for materials, and the weather and technical reasons could not burn tiles like those in the mainland. At the same time, the use of prefabricated components or field components is not mature in technology, which is easy to delay the construction period and has poor quality, so the iron roof is adopted. At that time, iron sheet was the most easily available material in Tibet, and the construction period of iron sheet was shortened and it was relatively strong. It is easier to replace when needed and can be reused to reduce some costs.