Galvanized Vs Painted Steel Roof

Both types of steel can be painted to improve durability.

Galvanized vs painted steel roof.

Steel is a tensile metal meaning that it has a high strength to weight ratio making it easy to work with. The pros cons of steel bare painted and galvanized. Final thoughts on galvalume vs. 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.

Steel is used in fabrication projects primarily for its durability and strength. Paint on the top side will interfere with shear bond and inhibit composite action. That coating isn t as dense. Underneath a painted metal roof there is a galvalume coating.

Technically yes however hot dipped galvanized steel resists corrosion in numerous environments for much longer than uncoated steel. 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. Therefore it should not be specified. The rust on galvanized will just continue to spread and get worse because it doesn t have that self healing property.

The standard is a 55 a z coating underneath the painted metal is a 50 a z coating. Since steel is highly versatile it s often coated with other. As far as the warranty goes metal roofs hold up great and. With that being said the painted metal roof has a 40 year warranty on the paint and 30 year fade warranty.

Whether it is paint or galvanised steel any coating is designed to protect the base material. It can also be painted and comes in many different looks. All coated steel materials however are vulnerable to corrosion at field cut edges although galvalume is the least affected table 2 10 below click to enlarge any image lists the advantages drawbacks compatibility and life expectancy of galvanized steel roofing aluminized steel roofing galvalume aluminum copper and zinc metal. There are slight differences between stainless steel and galvanized steel.

Galvanized steel is more durable than most other material utilized for building. The coating corrodes instead of the core material. In short this is what is meant by the term galvanized it takes its name from the italian scientist luigi galvani. Bare steel top painted bottom and galvanized top galvanized and painted bottom.