_ The roof is asbestos shingles. What if I want to leave a ventilated hole?

You can leave a skylight for ventilation.

Asbestos cement tile is a kind of waterproof material for floor roof, which takes asbestos fiber and cement as raw materials and is pressed by plate making. It can directly make a hole in the roof.

Asbestos tiles are internationally recognized as obsolete building materials, and the harm comes from their fibers, which are very small and almost invisible to the naked eye. When these tiny fibers are released, they can float in the air for a long time and be inhaled into the human body. Inhaled asbestos fibers can accumulate in the human body for many years, attach and deposit in the lungs, causing lung diseases.