Galvanized Vs Painted Roofing

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.

Galvanized vs painted 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. In short this is what is meant by the term galvanized it takes its name from the italian scientist luigi galvani. The coating corrodes instead of the core material. The problem with galvanized metal painted or not is that once it starts to red rust it doesn t eventually stop as galvalume does.

Well first lets address a common misconception. Paint adheres better to galvanized steel than to galvalume so it requires repainting less often. Both types of steel can be painted to improve durability. That coating isn t as dense.

Galvalume metal roofing system properties. The rust on galvanized will just continue to spread and get worse because it doesn t have that self healing property. There are slight differences between stainless steel and galvanized steel. With that being said the painted metal roof has a 40 year warranty on the paint and 30.

The standard is a 55 a z coating underneath the painted metal is a 50 a z coating. Galvanized steel is more durable than most other material utilized for building. Technically yes however hot dipped galvanized steel resists corrosion in numerous environments for much longer than uncoated steel. That s the normal length of warranty on kynar 500 paint finish.

Final thoughts on galvalume vs. Whether it is paint or galvanised steel any coating is designed to protect the base material. Why choose a painted metal roof. The metal roofing alliance recommends g 90 galvanized steel for roofing which has 90 ounces of zinc per square foot.

Because of the coating this material is resistant to atmospheric corrosion and can last from 50 to 75 years outlasting comparable galvanized roofing material. Also see complete list of types properties of metals used in roof systemsfor more about galvanized steel roofing. Expands with heating and cooling. Details about galvanized metal roofing are at galvanized steel roofs.

Underneath a painted metal roof there is a galvalume coating. The g 60 refers to amount of metallic finish per sq ft. It can also be painted and comes in many different looks.