- Galvalume® – The core substrate of Galvalume is steel, a rust-prone material, but it is continuously hot-dipped with 55% aluminum, 43.4% zinc, and 1.6% silicone. This coating combines the strength and cost-effectiveness of steel with the rust resistance of aluminum.
- Many of the old rusty roofs that people see out there are traditionally older galvanized roofs (cold-rolled) or COR-TEN®, which are materials designed to rust. Galvalume is created to have self-healing characteristics that regular galvanized roofing does not.
- Any steel roof, including Galvalume, can rust quickly if it’s scratched, perforated, or not properly maintained, especially where there are cut edges without proper hems.
- Copper – Copper doesn’t rust, but it will develop a protective covering called patina, which develops due to oxidation and sun exposure. There’s not an exact science to when patina will show up or what color it becomes; it can range anywhere from a dark bronze to a blueish-green covering.
- Zinc – Zinc is another material that doesn’t develop red rust. In fact, when zinc is exposed to carbon dioxide and moisture (present in our atmosphere), it forms its own protective patina layer called zinc carbonate, which helps further resist corrosion.
- Stainless steel – This steel alloy is made up of at least 10.5% chromium, which makes stainless steel rust-resistant. That being said, there are architectural stainless steels specifically formulated to develop a patina similar to zinc.
Why barn metal over a span of a thousand screws was a few that aren’t fastened correctly will lead to leaks.
This is what happens over time…
There are several ways to install a barn metal roof. However, finding the right contractor that will install the metal roof correctly is far few and in-between.