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Indeed, I live and move through areas of intense rain, and sometimes with strong winds, for this reason, months before, cautious people check their roofs, others are caught by the rainy season with its consequences.
Regarding your question, the downspouts are made of metal or planks, as are the channels themselves, or a combination of both; the metal ones are made of galvanized iron due to the rust issue.
I hope I have answered your question.
Greetings, you are very well.

Wonderful! Thank you for the informative update! 😊