How To Paint Galvanized Steel Roofing Panels

How To Paint Galvanized Steel Roofing Panels

Galvanized steel is often used as roofing panels because it is so highly durable and resistant to water damage. Some people will leave a galvanized metal roof as is, whereas others prefer to paint it. However, if you have to repair your galvanized metal roof anyway it might be a great visual decision to paint it afterwards. Read on to learn how to paint your galvanized steel roof and, if necessary, repair it.

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How to Paint Galvanized Steel Roofing Panels

Materials That You Will Need:

  • Rust Inhibiting Exterior Metal Primer
  • Acrylic Exterior Paint
  • Paint Tray
  • Paintbrush
  • Paint Roller/Handle
  • Ladder/Broom
  • Rag/Bucket
  • Scrub Brush
  • Pressure Washer (optional)
  • Sandpaper
  • Handheld Electric Sander
  • Trisodium Phosphate or other Cleaning Agent
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1.  Prep

  • Pick a nice partially cloudy day with no chance of rain to start off this project. You’ll need to be outside most of the day, so weather with cloud breaks will help prevent accidental sunstroke. Be sure that you do not pick a day when you notice environmental debris is circulating in the air (leaves, weeds etc.) or else it will ruin your galvanized roof paintjob.

2. Repair

  • If you find any spots that have rusted you’ll need to sand them down with a handheld electric sander. It shouldn’t be too hard to repair this because galvanized steel roofing is treated with zinc oxide to prevent destructive rusting.
  • Set up your ladder and start by brushing the roof clean of any dirt or debris with a scrub brush or broom. If you feel it’s necessary use a pressure washer to clean the surface area as well. You can also use a bucket of cleaning agent for galvanized steel roofing and a rag to ensure the roof is very clean. Then let dry.

3.  Prime

    • Get your rust inhibiting primer ready in a paint tray and, using a paint roller, apply the primer to each steel roof panel. Make sure you cover the roof entirely. The primer will protect the steel roofing and allow optimal results when you apply the paint.
    • Using a paintbrush, paint in any spaces that were left untouched by the roller (screws and cracks will need to be primed over). Allow primer to dry as instructed on the primer can.

4.  Paint

  • Using your exterior metal acrylic based paint, using the same paint tray that has been emptied of any remaining primer, begin to apply the paint with a roller directly onto the galvanized steel roof panels, in the same order you applied the primer.
  • Be sure to cover the entire surface so that you cannot see any primer left. Allow to dry. Usually leaving it overnight will ensure it has dried completely.


  • Using a drop cloth or tarp, it’s a good idea to cover the area around the roof that you don’t want paint to fall on.
  • If your roof has a steep slant it is best to have another person assist as a safety precaution.

How To Paint Galvanized Steel Roofing Panels Image Gallery

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Now that you have learned how to paint your galvanized steel roofing panels and repair any minor rust damage, you’ll have a very unique looking steel roof that will turn every head on the block! But if you can’t find the time to complete this project on your own, or your galvanized steel roof is too dangerous to attempt to paint, why don’t you call Home Painters Toronto and we’ll do it for you! Call us NOW at 416-494-9095 or [email protected].

Brian Young - Home Painters Toronto

From The Owner & Founder


Hello and welcome!

I’m both deeply honoured and flattered you are considering using our services.

Since 1987 when I was at York University simply earning my way through school, I’ve had the privilege to meet and work with thousands of amazing homeowners like yourself.

Besides the birth of my daughter, there is nothing more satisfying than seeing a homeowner’s life change when we have transformed their dream home into a masterpiece. For that reason, we take our jobs very seriously and are committed to our cause.

At Home Painters our mission is to paint homeowners’ dreams, and make your painting experience last a lifetime!
I look forward to hopefully meeting you one day, as it brings me tremendous joy to make homeowner’s dreams come true.