25 years didn't look right to me so I did some googling. Apparently in US people tend to use asphalt shingles which indeed last 20-25 years[0] [0] https://en.

25 years didn't look right to me so I did some googling. Apparently in US people tend to use asphalt shingles which indeed last 20-25 years[0] [0] https://en.wikipedia.org/wiki/Asphalt_shingle https://en.wikipedia.org/wiki/Asphalt_shingle