Galvanized Vs Painted Steel Roof

Technically yes however hot dipped galvanized steel resists corrosion in numerous environments for much longer than uncoated steel.

Galvanized vs painted steel 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. With that being said the painted metal roof has a 40 year warranty on the paint and 30 year fade warranty. That coating isn t as dense. As far as the warranty goes metal roofs hold up great and.

The rust on galvanized will just continue to spread and get worse because it doesn t have that self healing property. 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. The pros cons of steel bare painted and galvanized.

Whether it is paint or galvanised steel any coating is designed to protect the base material. In short this is what is meant by the term galvanized it takes its name from the italian scientist luigi galvani. Paint on the top side will interfere with shear bond and inhibit composite action. Galvanized steel is more durable than most other material utilized for building.

Underneath a painted metal roof there is a galvalume coating. There are slight differences between stainless steel and galvanized steel. The problem with galvanized metal painted or not is that once it starts to red rust it doesn t eventually stop as galvalume does. If bare galvanized deck must be field painted ensure that any mill treatment is removed before priming.

The coating corrodes instead of the core material. Since steel is highly versatile it s often coated with other. The standard is a 55 a z coating underneath the painted metal is a 50 a z coating. Both types of steel can be painted to improve durability.

It can also be painted and comes in many different looks. Bare steel top painted bottom and galvanized top galvanized and painted bottom. Therefore it should not be specified. 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.