In a previous post we talked a little bit about the 5 Benefits to Metal Roofing. We discussed the durability and protection it provides, how it is energy efficient, and about the aesthetics. But, what material options are available for your metal roof?
In this post we will delve into a few of the metal roofing products that are used and some of their specifications.
Metal Roofing Materials
Let’s start with some of the more well-known types of metals first.
Aluminum comes in a variety of different alloys and finishes. At OFR Metals, we offer 3003 H14, 5052 H32, painted aluminum, and anodized aluminum for roofing needs. Aluminum is the most common metal material used for roofing due to its corrosion resistance and formability.
You can learn about how aluminum is made here.
Stainless steel is typically used when corrosion resistance is a primary requirement. Types 304 2B and 316 2B provide excellent corrosion resistance which extends the lifespan of the roof. Stainless steel has greater mechanical properties than other roofing metals so it is important to have plenty of horsepower and tooling to form it.
To learn about how stainless steel is made, check out our blog post.
A606 steel is a High Strength Low Alloy (HSLA) steel, also known as a weathering steel. The material composition leads to the development of an orange-brown oxide film (rust) on the steel that aids in the resistance from corrosive elements.
For roofing, cold rolled steel is a bit easier to form than A606 and produces a similar rustic, non-reflective appearance.
Galvanized steel is another of the more common metals used for metal roofing applications. Just like aluminum, galvanized is not only found in the roofing panels, but is also used for roofing applications such as chimneys, gutters, etc. It is resistant to corrosive environments and lends itself to most fabrication processes. It is also readily paintable, which makes it ideal for roofing applications.
Many people know galvanized steel by its spangle finish, but do you know how it gets that finish? Find out here.
Galvalume® is a carbon steel that has been coated with aluminum-zinc alloy after going through a continuous hot-dip process. The coating composition is 55% aluminum and 45% zinc. It is ideally suited for most types of roofing and siding applications due to its versatility, ease of use, and long-term performance.
Galvalume® looks similar to galvanized steel, but the spangle pattern is smaller and closer together which gives it a smoother appearance.
Paintgrip is galvanized steel that has been put through a phosphate bath, or bonderized, that adds a coating over the zinc. It also has a layer of Chromate applied. The coating preps the surface for painting without further preparation. It can also be used without the paint to allow for it to weather.
Kynar 500® is a resin-based coating that provides protection to aluminum and coated steel. It is a high-performance fluoropolymer resin that keeps the paint on roofing and siding systems vibrant. It also offers fade resistance.
Siliconized Modified Polyester (SMP) is close to Kynar in durability. It is a two-coat finish for aluminum and Galvalume®. The coating provides excellent scratch resistance.
For more information on both products check out our metal roofing products page.
So, as you can see there are a lot of options to consider for your next roofing project. Each brings a specific quality to the table, whether you need corrosion resistance, a rustic aesthetic, or a long-lasting finish.
OFR Metals stocks all of these products, however, availability may vary depending on location. For more information on what products are offered near you, contact your local sales representative.