Painting A Rusty Galvanized Metal Roof

You can wash it by hand using a sprayer attachment to a garden hose or a power washer.

Painting a rusty galvanized metal roof.

Water blast clean the prepared surface to remove all remaining dust and contaminants leaving a clean dry surface. After you ve sanded away the rust apply 2 coats of a rust inhibiting primer to prevent rust building up underneath the paint. 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. Hand or power tool clean the rusty metal to remove any flaky rust and unsound paint.

How to prepare a rusted galvanized metal roof for painting step 1. Scrape rust from the roof using a wire. Link to product info on amazon first might be a good idea. Then apply 2 coats of a water based enamel acrylic paint to bring out the color.

Choose a type of paint you may or may not need to prime the surface depending on the type of paint you choose. 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. Access the rusted galvanized metal roof using an extension ladder. Wait a full 24 hours for the roof to dry.

A power washer may remove more of the rust for you. You can also use oil based alkyd paint but. If it s a newer roof the galvanizing can definitely cause you adhesion problems. Wash the metal roof using trisodium phosphate in water at a ratio of 1 cup tsp per 1 gallon water.

Instructions on how to paint over rust. Wait for the roof to dry completely before proceeding. Paint over the primer with a water based metal roof paint that contains rust inhibitors. The acidity of the vinegar will react with the metal treating the surface to promote paint adhesion.

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