Painting A Rusty Galvanized Metal Roof

How to prepare a rusted galvanized metal roof for painting step 1.

Painting a rusty galvanized metal roof.

A power washer may remove more of the rust for you. Wash the galvanized metal using a pressure washer. If it s a newer roof the galvanizing can definitely cause you adhesion problems. After noxyde is applied.

Choose a type of paint you may or may not need to prime the surface depending on the type of paint you choose. Wait for the roof to dry completely before proceeding. 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. Water blast clean the prepared surface to remove all remaining dust and contaminants leaving a clean dry surface.

All you have to do is simply apply the vinegar to a clean rag and then wipe down the galvanized surface. Hand or power tool clean the rusty metal to remove any flaky rust and unsound paint. You can wash it by hand using a sprayer attachment to a garden hose or a power washer. Wait a full 24 hours for the roof to dry.

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. Instructions on how to paint over rust. Access the rusted galvanized metal roof using an extension ladder. You can also use oil based alkyd paint but.

Wash the metal roof using trisodium phosphate in water at a ratio of 1 cup tsp per 1 gallon water. Scrape rust from the roof using a wire. Paint over the primer with a water based metal roof paint that contains rust inhibitors. Allow the first coat to dry completely before applying a second coat.

The acidity of the vinegar will react with the metal treating the surface to promote paint adhesion.