Galvanized Vs Painted Metal Roofing

2 a new bare galvanized or galvalume roof will reflect more solar energy than most painted colors.

Galvanized vs painted metal roofing.

Final thoughts on galvalume vs. Galvanized steel metal roofing system properties. The problem with galvanized metal painted or not is that once it starts to red rust it doesn t eventually stop as galvalume does. There are slight differences between stainless steel and galvanized steel.

For these reasons galvalume metal roofs are much more popular. With kynar 500 or hylar 5000 paint finish or its equivalent you will not have to paint over your steel roof for at least 30 years. So what exactly is galvalume anyway. Aluminum roofing comes with paint finishes as well and have their own warranties.

To protect against corrosion the steel is bonded to a layer of zinc which works as a sacrificial coating on the surface and also offers some protection to cut edges and nicks by flowing to these areas. The rust on galvanized will just continue to spread and get worse because it doesn t have that self healing property. That s the normal length of warranty on kynar 500 paint finish. Paint does not adhere as well to galvalume so the aesthetics may not be as good.

The answer to the question isn t always an easy one. Should i buy galvalume metal roofing or should i buy painted metal roofing. Paint adheres better to galvanized steel than to galvalume so it requires repainting less often. Galvanized steel is more durable than most other material utilized for building.

The heavier the zinc coating the longer the protection. Also galvalume costs more than galvanized metal roofing but the fact that a galvalume metal roof will last up to twice as long as a galvanized roof of the same thickness could make up the difference. Lets dive in a little. Both types of steel can be painted to improve durability.

We get this question a lot. Painted metal roof vs. Whether it is paint or galvanised steel any coating is designed to protect the base material. The coating corrodes instead of the core material.

Additionally primer and paint adhere better to galvalume coated panels and they carry a 20 year limited warranty while galvanized panels do not making them a smarter long term investment for your customers homes agricultural buildings or commercial properties. Galvalume is a sheet steel product covered with an aluminum zinc. It can also be painted and comes in many different looks. Paint finish warranties are key to understanding the expected longevity of a galvanized or galvalume metal roof.

However over time the reflectance of galvalume drops some but the reflectance of galvanized drops significantly painted roofs have less change in relectance over time.