The first trick to corrugated metal roof is to not paint a dirty metal roof.
How to paint rusted corrugated iron roof.
If crawling around on a metal roof in the hot sun does not.
Instructions on how to paint over rust.
This will inhibit any more rust from spreading and will form a strong bond between the metal and the paint.
Now that your roof is cleaned and primed you can start painting.
Apply the sherwin williams paint and primer to a galvanized roof with a paintbrush or a roller specifically designed for corrugated metal.
Hand or power tool clean the rusty metal to remove any flaky rust and unsound paint.
Scrape rust from the roof using a wire brush.
If your roof is unpainted prime it with a metal primer.
Again work from your ladder as much as possible.
Wait a full 24 hours for the roof to dry.
Water blast clean the prepared surface to remove all remaining dust and contaminants leaving a clean dry surface.
Step 2 maintain the roof.
Apply a primer to the roof using a wider sponge roller brush or a paint sprayer.
Let the roof dry out thoroughly before applying noxyde coating.
Apply a generous amount of paint across the entire roof.
Allow the primer to cure according to package instructions before proceeding.
Use a power washer or brush with a mild cleaner to remove grime and debris.
Wash the galvanized metal using a pressure washer.
Use a primer that is designed for metal and prevents rust.
Access the rusted galvanized metal roof using an extension ladder.
How to prepare a rusted galvanized metal roof for painting.
Apply a coat of paint to the entire roof.
Wash the brush or roller you used for the primer or get a new one.
If your roof is painted but has bare patches from rust removal apply a primer to those areas too.