You can paint a metal roof if the metal is sound and the surface is washed, rinsed, primed where needed and tested for adhesion. Paint will not fix rusted-through panels or leaking seams, and field painting can end a warranty. Coastline does not paint metal roofs, but we can inspect one.
Your metal roof looks tired and someone told you paint would save the cost of a new one. Here is when that holds up and when it does not.
Yes, in many cases, but only if the metal is sound and the prep is done right. Coastline does not paint or coat metal roofs.
A painted metal roof can be repainted. The catch is that the work is mostly prep. Fine Homebuilding magazine, in its guide to refinishing a rusty metal roof, says thorough preparation is key, and a repainted roof should last about 20 years in its example. Other sources give lower numbers for lower-cost paints, so treat any number as an estimate until you see the paint maker's data sheet.
Here is where we stand. Coastline installs metal roofs, and we repair and replace them. We do not paint or coat metal roofs, so this page is here to help you decide what to ask whoever you hire, and when a new roof makes more sense. If you want to know the condition of your metal roof, an inspection with a written photo report is where to start.
Coastline does not paint metal roofs, but we do install, repair and replace them. We can inspect yours and give you a written photo report that shows what condition the metal is really in. Coastline Roofing works all over Florida (license CCC1331076).
The finish and the metal under it decide the answer.
Metal roof finishes get dirty and can chalk (a powdery film) in strong sun. AkzoNobel, a coatings maker, says a good cleaning will generally restore a factory finish and make repainting unnecessary. Wash first before you pay for paint.
If the metal is solid and the finish has only faded, a repaint can change the look. Fade is more common on lower-cost paints. InspectApedia says plain polyester can fade significantly in 5 to 7 years in direct sun.
Small rust spots can be scrubbed, treated with a rust-inhibiting primer and painted, per Fine Homebuilding. Our guide to metal roof rust in coastal Florida explains how to tell surface rust from rust that has eaten through.
Paint is a finish, not a structural repair. Once metal has holes or flaking edges, coating over it hides the problem for a short time. That is when a roof is usually closer to replacement.
Field painting can end warranty coverage. Metal Sales, a panel maker, states its coil warranty does not apply to panels that have been field painted. Check your warranty before anyone opens a paint can.
If water is coming in at a seam, a screw or a flashing, paint will not stop it. Our guide to metal roof screws leaking covers what to check.
The factory finish decides how hard it is to repaint. The most durable finishes are also the slickest to bond to.
Most metal roof panels come with a baked-on factory finish. Here are the three common types, with the numbers InspectApedia reports:
| Finish | What to know |
|---|---|
| Polyester | Lowest cost. Can fade significantly in 5 to 7 years in direct sun. Warranties usually run 3 to 5 years and rarely cover fading or chalking. |
| Silicone-modified polyester (SMP) | Resists fading and chalking better. Warranties against excessive fading and chalking run about 10 to 20 years, depending on the mix. |
| PVDF (Kynar 500, Hylar 5000) | Most expensive and most durable. Warranties typically run 20 years or more, with 10 to 20 years of protection against excessive fading. |
Fine Homebuilding calls PVDF finishes the best and notes they are baked on at the factory, so they are hard to match in the field. It also notes that a water-based PVDF product made for field use exists.
To tell what you have, look at the panel stamp, the original paperwork or the manufacturer. If you cannot find out what the finish is, a painter cannot pick the right primer either.
Wash it, rinse it, treat rust, test that new paint sticks, then coat within the time the maker allows.
This list follows AkzoNobel's care and repaint guide for factory-finished panels and Fine Homebuilding's guide. Your paint maker's data sheet always comes first.
Identify the metal (Galvalume, galvanized steel or aluminum) and the finish. This decides the primer.
Clean off dirt, loose chalk and mildew using the cleaning method in the paint maker's guide. AkzoNobel says an annual wash is the only regular upkeep a baked-on finish needs.
AkzoNobel warns that cleaner left on the surface can damage how the new paint bonds. Rinse with clear water.
Scrub rusted patches with a wire brush and use a rust-inhibiting primer, per Fine Homebuilding. For heavy rust, AkzoNobel calls for brush-off blast cleaning and a maintenance primer made for galvanized steel.
New panels can still carry a factory wax for up to two years, and AkzoNobel says it must be scuffed off with a gray synthetic pad. Do not sand through the factory finish or the metal coating underneath.
Before painting the whole roof, test a small area. AkzoNobel says if the test shows poor bonding, stop and call the panel supplier.
AkzoNobel says to coat within 24 hours after prep. Oil-based alkyd house paint must not go over factory finishes. Exterior acrylic latex direct-to-metal paint is its listed alternative.
Ask what is on the roof now, how they will test adhesion, and what the paint maker will put in writing.
Whoever you hire, a good answer to each question below will be specific. A vague answer is a reason to keep looking. Coastline does not do this work, so these questions come from the sources on this page, not from a sales pitch.
Not always, and a paint warranty does not cover rust on the metal underneath.
Salt makes the finish and the metal work harder. Drexel Metals, a coil maker, writes that a paint warranty does not cover corrosion of the base metal in a saltwater environment, and that scratches and cut edges can start rust. It recommends a periodic fresh water rinse in coastal areas. Our guide to metal roof warranties near salt water shows the distance limits in real warranties.
Be careful with patch products too. InspectApedia warns that some roof coatings and roofing cements sold to patch rusting or leaky roofs contain chemicals that speed corrosion. Confirm that anything you put on the roof is approved for the metal it covers.
One more thing: wet paint on a metal roof is slippery, and InspectApedia lists walking on a metal roof while painting as one of the quickest ways to fall. This is a job for a trained crew with fall protection.
If the panels are rusted through, the fasteners are failing or the roof leaks in more than one place, a new roof usually costs less over time than coating a roof that is wearing out. Our metal roof cost guide and roof cost per square guide explain what drives the price, and roof replacement shows how Coastline handles the work.
"Josh was especially amazing. He was professional, patient, and took the time to explain everything clearly so I felt comfortable and informed throughout the entire process. You can tell he genuinely cares about his customers and takes pride in his work."Madison T.Roofing customer
"Good communication and did a great job."Rick R.Roofing customer, Florida Gulf Coast
"Highly recommend. Great communication. Great quality of work and very personable. Easy to work with. Will use again for home renovations."Justin S.Roofing customer, Florida Gulf Coast
It depends on the paint, the prep and the metal. Fine Homebuilding says a repainted roof should last about 20 years in its example, while other sources cite shorter ranges for lower-cost paints. Treat these as estimates and ask the paint maker what its data sheet and warranty actually say for your roof.
AkzoNobel says oil-based alkyd house paint must not be applied over factory-applied finishes. It lists exterior acrylic latex direct-to-metal paint as an alternative after proper prep. Confirm the exact product against the maker's data sheet, because the right choice depends on your finish.
It can. Metal Sales' PVDF coil warranty says it does not apply to panels that have been field painted. Other makers have their own wording. Read your warranty or call the manufacturer before you repaint, and keep that conversation in writing.
Fine Homebuilding says rusted patches should be wire brushed and treated with a rust-inhibiting primer. For heavy rust, AkzoNobel recommends brush-off blast cleaning and a maintenance primer made for galvanized steel. Heavy rust that has eaten through the metal is a sign to look at replacement instead.
No. Coastline installs, repairs and replaces metal roofs, including 24-gauge standing seam and 5V crimp. We do not paint or coat them. We can inspect your roof and give you a written photo report so you know what you are dealing with before you hire anyone.
Coastline can inspect your metal roof and give you a written photo report with a straight answer on repair, replacement or leaving it alone.
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