Painting A Rusty Galvanized Metal Roof

After you ve sanded away the rust apply 2 coats of a rust inhibiting primer to prevent rust building up underneath the paint.

Painting a rusty galvanized metal roof.

Wait a full 24 hours for the roof to dry. Paint over the primer with a water based metal roof paint that contains rust inhibitors. Choose a type of paint you may or may not need to prime the surface depending on the type of paint you choose. Allow the first coat to dry completely before applying a second coat.

Link to product info on amazon first might be a good idea. After noxyde is applied. If it s a newer roof the galvanizing can definitely cause you adhesion problems. 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.

Instructions on how to paint over rust. Scrape rust from the roof using a wire. You can wash it by hand using a sprayer attachment to a garden hose or a power washer. Water blast clean the prepared surface to remove all remaining dust and contaminants leaving a clean dry surface.

Access the rusted galvanized metal roof using an extension ladder. How to prepare a rusted galvanized metal roof for painting step 1. The acidity of the vinegar will react with the metal treating the surface to promote paint adhesion. Wash the metal roof using trisodium phosphate in water at a ratio of 1 cup tsp per 1 gallon water.

If it s quite old and rusty any primer for metal followed by any outdoor paint designed for metal is probably okay although a rust converter affil. Hand or power tool clean the rusty metal to remove any flaky rust and unsound paint. Then apply 2 coats of a water based enamel acrylic paint to bring out the color. Wait for the roof to dry completely before proceeding.

All you have to do is simply apply the vinegar to a clean rag and then wipe down the galvanized surface.