Sand the entire metal roof surface very lightly with your wire brush or sandpaper.
Can you paint over a metal roof.
Be extremely careful not to pierce the metal when scraping.
Not using a sealant.
Metal surfaces require specialized primer and paint for good paint adhesion.
To prep metal for paint adhesion you must.
If you choose the wrong paint you are putting your roof at the risk of molding and rotting over time.
You cannot set up roof jacks on a metal roof as you can on a shingled one so if you plan to paint with a brush or roller include a safe way to reach the ridge in your plans.
Before painting you ll still need to do a little.
Water resistant metal roofing paint for example can be of great value if you live in a rainy area.
Due to its slick smooth surface metal can be challenging to paint and that can you ve got sitting around in the garage probably won t cut it.
This is why when you are considering painting your metal roofing it makes sense to go for specific paints for the metal roof.
Whether your roof has been painted previously or not powerwash just before you start painting.
People assume that if they use waterproof paint it will be better for their roof but instead of protecting your shingles it creates a barrier that traps moisture in leaving your home at the risk of molding.
If you have a terne metal roof like this one then it has probably been repainted several times over the years.
However if you want to paint over prepainted metal you re in luck.
Another mistake is to forget or ignore using a sealant before the application of the metal paint.
Try to achieve a slightly abraded texturized finish as this helps your new paint bond with the roof finish.
Although it isn t recommended to use a metal implement to scrape the roof it was the only way to remove the loose rust and old paint.
Prepainted metallic surfaces can be treated almost like any other basic latex or oil painted surface.