Painting Old Galvinized Roof

To paint a metal roof you ll need to use an oil based paint if you have a terne metal roof or an acrylic based paint if you have a galvanized metal roof.

Painting old galvinized roof.

Because of its smooth slick zinc coated finish galvanized steel can be tricky to paint. Start by cleaning the. Next question the roof 1918 section galvanized 6 sided high gauge thickness steel shingles which never leaked and in great condition except for surface rust. Discussion starter 1 apr 6 2013.

If you re not sure what kind of roof you have ask a professional roofer to inspect it before you paint it. How to paint galvanized steel. This roof is too huge to wash with household vinegar or tsp or even light sandblasting would take. The roof seems to be in good shape although there are stripes of rust at the seams.

Unfortunately over time this coating can fail leading to minor rust outbreaks. If you are preparing to paint a rusted galvanized metal roof pay special attention to surface preparation or you will have a recurrence of rust and or flaking. I do understand that cheap paint sometimes costs more in the long run any advice. You ll also need to purchase a primer designed for metal roofs.

Terne is best painted with an oil based paint. Many metal roofs are made out of galvanized metal which is a type of metal that has been covered with hot zinc in order to protect it from the weather. Joined oct 14 2008 58 posts. Galvanized roofs require the use of a different paint than what is used on terne metal.

One of my neighbors used an oil based paint as a primer since some of the metal was rusted and then covered the roof with one of the specially formulated roofing paints that is sold by calbar for use on old. We want to paint the existing roof to match the metal roof we put on the addition but our painting contractor says that you can t paint an old metal roof because the paint won t stick. However paint on metal roofs often peels or rusts in which case it is time to repaint it. I have an old worn in need of repair pole barn out at my place.

Before you jump right into it it s critical to prep the nonstick surface so it can hold paint. It has a galvanized metal roof that is about 40 50 years old. Painting a galvanized steel panel roof is not all that different from painting other metal objects but you must ensure that the surface is perfectly clean before beginning the application process. Just before painting wash the roof with a power washer at a pressure of 2 500 pounds per square inch whether it is a new or an old one that requires re painting.