the other is responsible the other part.
The very first thing to be set up after the wooden frame is laid down is a leak-proof barrier. Highly efficient leak barriers are placed at the edges, valleys, and peaks of the roof. These areas of the roof are the most susceptible to leaks and other damage, and the barrier helps to keep them sealed securely.
In the next step, you’ll need add an additional layer of safeguarding your roof deck. It is an extremely thin and flexible material that stops rainwater from getting into your home or causing harm.
Over the leak barrier, drip edges made of metal can be installed. The metal drip edges are put on top of the leak barrier in order to protect the edge of the roof, which is the most susceptible to being removed during storms that are heavy. Then, starter strips are installed and then the shingles are placed. The potatoes and the meat form on the roof.
Since the shingles will not fit there securely, additional protection is required on the tops. The chimney and pipes are protected by flashing. To learn more, check out the above video.