Galvanized Vs Painted Metal Roofing

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.

Galvanized vs painted metal roofing.

2 a new bare galvanized or galvalume roof will reflect more solar energy than most painted colors. That s the normal length of warranty on kynar 500 paint finish. The big difference is that aluminum will oxidize chalk if exposed to the elements but the aluminum will not look unsightly and continue on with a rapid oxidation process deterioration rust as steel will. Galvanized steel is more durable than most other material utilized for building.

Both types of steel can be painted to improve durability. Should i buy galvalume metal roofing or should i buy painted metal roofing. Galvalume is a sheet steel product covered with an aluminum zinc. Technically yes however hot dipped galvanized steel resists corrosion in numerous environments for much longer than uncoated steel.

We get this question a lot. In short this is what is meant by the term galvanized it takes its name from the italian scientist luigi galvani. Paint adheres better to galvanized steel than to galvalume so it requires repainting less often. Galvanized steel metal roofing system properties.

Aluminum roofing comes with paint finishes as well and have their own warranties. The answer to the question isn t always an easy one. It can also be painted and comes in many different looks. The rust on galvanized will just continue to spread and get worse because it doesn t have that self healing property.

The heavier the zinc coating the longer the protection. Paint finish warranties are key to understanding the expected longevity of a galvanized or galvalume metal roof. 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. 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.

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. There are slight differences between stainless steel and galvanized steel. 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 coating corrodes instead of the core material.

Lets dive in a little. Painted metal roof vs. So what exactly is galvalume anyway. Paint does not adhere as well to galvalume so the aesthetics may not be as good.

Final thoughts on galvalume vs.