Metal roofs are known for their durability and longevity, but even they can benefit from a fresh coat of paint every now and then. However, painting a metal roof isn’t just a way to give your home a new look—it can also extend the life of your roof. If you’re wondering if you can paint a metal roof, not only can you paint it—you should.
Still, painting a metal roof isn’t as straightforward as it may seem. If you’re new to the process or you’re unsure of what type of paint to use, read on to learn everything you need to know about painting a metal roof.
Why Paint a Metal Roof?
Painting a metal roof is a lot of hard work, but it serves several purposes. Here are some key reasons homeowners choose to paint their metal roofs:
Your Home’s Appearance
One of the biggest reasons for painting any roof is to restore its appearance. Over time, exposure to UV rays, rain, wind, and falling debris can scratch and age a roof prematurely. A fresh coat of paint can instantly liven up your home’s exterior, boosting its curb appeal.
Increased Lifespan
By painting every decade or so, homeowners can extend the lifespan of their metal roofs. Some metal roofing materials can last up to 50 years, and applying the right coating or paint can increase their durability against small debris and weather.
Improved Home Energy Efficiency
Metal roofs are known for their insulation and reflective qualities. Painting your roof according to cool roof EPA guidelines can make your home more energy-efficient. Lighter-colored metal roofs can reduce reflected heat in dense areas.
Types of Paint for Metal Roofs
Not all paints work well with all types of metals, so choosing the right paint is important if you want your roof to look great and function properly. The type of metal roof you have will determine the best paint to use:
For Galvanized Metal Roofs
Most modern homes have galvanized metal roofs. For these, homeowners can use either oil-based alkyd paint or acrylic latex paint. Both options provide excellent coverage and protection against the elements. For more information, check out our tips for painting galvanized metal.
For Terne Roofs
Older homes often have terne roofing, which is a steel metal base with a zinc and aluminum alloy coating. For these roofs, oil-based paint is the best choice for full protection.
How Frequently Should I Paint My Metal Roof?
In most cases, you should plan on painting your metal roof once every 10 years. If your roof is in good condition, you could stretch it a little further. If you live in a climate that’s putting more wear and tear on your roof than normal, you could paint it sooner.
However, instead of painting it like clockwork every 10 years, pay close attention to the condition of your roof. If it needs paint for protection, don’t wait until the next decade to paint it.
How To Paint a Metal Roof
Painting a metal roof is a relatively simple DIY task, but it requires careful preparation and execution. Here’s a step-by-step guide to help homeowners through the process:
Surface Preparation
Before you start painting:
- Choose a dry day with mild temperatures for the project.
- Remove old paint using a power washer or mineral-based solvent.
- Remove rust with paint scrapers, abrasive brushes, or vinegar for stubborn patches.
- Powerwash the roof to remove all debris and dirt.
- Allow the roof to dry completely before moving on to the next step.
Apply Primer
Once your surface is ready, it’s time to add primer. This makes sure that the paint adheres properly to the metal surface.
To apply primer:
- Wait for your roof to dry.
- Apply a thick coat of primer to all dried surfaces using a roller or spray painter.
- Take extra care with hard-to-reach areas near the roof’s peak.
- Allow the primer to dry for about an hour before proceeding.
Apply the First Coat of Paint
Once the primer is dry, it’s time to apply the first coat of paint:
- Begin at the peak of each roof section and work your way down.
- Apply a thick layer of paint using a roller or spray painter, working methodically through each area.
- Be mindful of overlapping sections to make sure there are no missed spots or uneven layers.
- Ensure thorough coverage, as multiple coats will be necessary.
Apply the Second Coat
After the first coat has dried for at least an hour, apply the second coat:
- Follow the same process as the first coat, starting from the peak and working your way down.
- Allow this coat to dry completely before assessing if you need a third coat.
Safety Tips for Painting Your Roof
Safety should be your top priority whenever you’re working on the roof. Here are a few safety tips for homeowners to keep in mind:
Work From a Ladder
Make sure to use an appropriately sized ladder based on your roof height. Don’t use a ladder that’s too short and will force you to reach from the top step.
Use an Anchor
If you need to walk on the roof, anchor yourself to a secure roof fixture like a chimney. Wear a harness with a short lead to the secure point for added safety.
Don’t Work Alone
Many hands make light work. Having an assistant can prevent rushing and ensure someone is there in case of an emergency. When in doubt, the Occupational Safety and Health Administration’s guide on protecting roofing workers outlines all the potential risks and roofing safety tips you’ll need to know.
Roof Maintenance Tips
Regular maintenance can extend the life of your painted metal roof. Here are some tips for homeowners:
Regularly Inspect and Clean Your Roof
Conduct a full inspection of your roof twice a year, at the beginning of spring and the end of autumn. Look for any signs of damage or wear that may need attention. Be sure to fix a leaking roof before it turns into a bigger issue later.
Trim Trees Near Your Home
Keep trees trimmed to prevent damage from falling limbs. This simple step can keep your metal roof from getting dented or scratched.
Clean Your Gutters
Regular gutter cleaning prevents water damage to your fascia boards, soffits, and the substrate under the edge of your roof. Even with the best gutter guards, you should still inspect and clean your gutters several times a year.
Cost To Paint a Metal Roof
According to Angi, homeowners can expect to pay between $1,164 and $3,623 for a professional paint job, with an average cost of $2,394. This equates to roughly $2 per square foot.
However, the paint itself can be pricey as well. DIY costs for paint alone could range from $20 to $70 per gallon for traditional paints and $50 to $450 a gallon for specialty paints. According to Angi’s paint cost data, acrylic latex paint ranges from $20 to $50 a gallon, while oil-based paint ranges from $20 to $80 a gallon.
This five-gallon bucket of Gardner metal roof acrylic coating covers up to 450 square feet of roof while costing $150. With multiple coats, you could pay $1,050 for the paint alone.
While that may seem like a big price range, there’s even more of a disparity with specialty paints. Angi’s paint cost data puts silicone-modified polyester (SMP) paint at about $50 to $150 per gallon, and polyvinylidene fluoride (PVDF) paint at $70 to $450 per gallon.
DIY or Hire a Professional?
While painting a metal roof is within the capabilities of many homeowners, it’s not for everyone. Roofing work can be dangerous, and mistakes can be costly.
If you’re on the fence about whether to do it yourself, it’s probably better to hire a professional. Unless you feel up to the task, it’s not worth the risk. It costs a lot to hire a professional roof painter, but it’s less than the cost of hospital bills for falling off a roof.
Final Thoughts About Painting a Metal Roof
Painting a metal roof is a great way to give your home a fresh makeover, but it’s also a practical decision. Adding a coat of paint to your roof can increase its lifespan and protect it from weather damage. In some cases, it can even lower your heating and cooling costs depending on what color you paint it.
If you’ve never considered it before, it’s probably time for you to think about painting your roof. It may be pricey, but your future self will thank you for keeping your roof in good shape.
