Painting Old Metal Roof

The first step in painting any metal roof is determining what substrate and existing coatings you are dealing with.

Painting old metal roof.

Coat the entire metal roof surface with a rust inhibiting primer. Check with your homeowner s association for any painting regulations. Terne is best painted with an oil based paint. A topcoat doesn t eliminate the need for a good primer the topcoat seals your paint but the primer makes the paint adhere properly.

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 metal roofs for an added layer of protection. There are several different types of metals used in roofing applications. Choose a paint that s right for your metal roof. Choose a product designed for use on outdoor metal applications.

I used acrymax from preservation products. I used three coats. Choose a color that goes with the. The first was their basic coating hp 1000 followed by two coats of hp 5000.

Apply the primer with a roller using a paint brush to access. Some historical homes have terne metal roofs and these need to be. Galvanized roofs require the use of a different paint than what is used on terne metal. Oil based alkyd paint may also be used with an appropriate galvanized metal primer.

Painted metal roofs come with a baked on factory finish and you can re coat these as well as paint bare metal roofing with acrylic latex paint. Acrylic latex paint is a good choice for bare metal roofs and to go over old paint. Metal roofs should be coated painted with a specially roof formulated acrylic latex which bonds tightly to metal and becomes a flexible coating 15 20 mils thick.