08-18-2024, 01:05 AM
I don't think there is a single answer to this. If they are regularly cleaned and repainted when necessary I've heard of them lasting up to 70 years, a theoretical figure considering they are guestimating on newer products that haven't been around that long. On the other hand, there were people complaining that the acid rain and fumes from the Leilani eruption were causing a chemical reaction with the galvanizing.
And then you have to consider that 10 or 20 years from now somebody may come out with a new product that adds even more life to them.
I saw an older, neglected, galvanized steel roof in Volcano where much of the paint was gone and the metal was rusting. The owner paid somebody who cleaned, treated, and repainted it and it looked like new. I can't remember how much they told me it cost but I do remember being very surprised at how affordable it was. I saw the same roof about 9 months later, still looked brand new, but whether the miracle coating will really last, I don't know.
We're in the process of getting someone to clean and inspect our roof (15 years old so overdue) now.
And then you have to consider that 10 or 20 years from now somebody may come out with a new product that adds even more life to them.
I saw an older, neglected, galvanized steel roof in Volcano where much of the paint was gone and the metal was rusting. The owner paid somebody who cleaned, treated, and repainted it and it looked like new. I can't remember how much they told me it cost but I do remember being very surprised at how affordable it was. I saw the same roof about 9 months later, still looked brand new, but whether the miracle coating will really last, I don't know.
We're in the process of getting someone to clean and inspect our roof (15 years old so overdue) now.