Painting a metal roof is a once-in-a-lifetime activity, thus finding the right metal paint is essential. Fortunately for you, I've spent much time researching various roofing paints over the years, so I know what a minefield it can be and how to overcome it.
I've put this knowledge to use while researching the newest paint systems on the market in the United Kingdom. Keep reading to find out which paint takes home the 'best paint for corrugated metal roofs UK' title.
Painting a metal roof is a project you'll only do once or twice in your life, so finding the best metal paint is essential. I've spent hundreds of hours researching roofing paints over the years, so I know what a minefield it can be and how to navigate around it.
This is a relevant topic to us because I've already used it in my research on the UK paint industry. So, read on to learn which paint receives the 'best paint for corrugated metal roofs UK' award.
1: Wethertex CP80 Clad-Seal Steel & Cladding Coating
Wethertex CP80 is a self-priming paint that has exceptional covering power. It dries quickly, so you may apply a second coat in as little as 2 to 4 hours.
The CP80 comes in a variety of standard colors that may be tinted in any RAL or BS4800 color. It's ideal for hiding in with the crowd because it has over 4,000 color options.
Because the 10-liter tubs are heavy (about 13kg), you might want to decant half of it into a smaller container before bringing it up on the roof, especially if you need to reduce it. A mix of CP80 and water should be used to thin it. When applied to bare metal, the 10 m2/liter coverage rate is enhanced even more when CP80 is thinned with 10% water.
The CANICOPIA CP80 is a liquid concentrate that can be used as a spray, roller, or brush. However, keep in mind the weather conditions at the time of application. Don't apply in the heat of summer or when the substrate temperature is more than 30°C. Also, check the forecast for rain; it must remain dry for at least 24 hours.
Avoid sunny days - a sun-drenched day with overcast skies is ideal, so the ideal time for a typical summer's day in the UK is high noon.
The CP80 can endure rust for up to 12 years and is also salt-tolerant, making it perfect for coastal areas. It may be used on a variety of roofing materials, including powder-coated steel, aluminum, copper, and zinc. It's also safe to use on galvanized steel, Plastisol, PVF2.
Read more: What’s The Best Paint For a Roof
2: Rust-Oleum Mathys Metal Cladding Topcoat
This semi-gloss acrylic resin paint is designed for use on all types of metal cladding with a single coat coverage of approximately 8 m2/liter. It's made from 18 different types of cement, is available in an array of RAL and BS4800 colors, and has a 10-year lifespan.
The topcoat can be applied to galvanized steel, aluminum, copper, zinc, and Plastisol coated sheeting for a long-lasting, durable finish. It isn't as quick-drying as Wethertex CP80, but it can be applied to a second coat after 8 hours.
The weather at the time of application, like Wethertex, is important. Avoid applying the paint on hot or cold days, and don't do it if there's going to be rain in the next 24 hours. To apply the paint, use a brush, a short nap roller, or an airless spray gun.
As a professional painter, I often use spray paint. When using a spray gun, one coat should be sufficient. A 10-liter tub of Topcoat covers approximately 80 square meters, but some unpainted surfaces will require a primer. For this, we recommend using the Mathys Metal Cladding Primer from Rust-Oleum. The Suntuf Ultra is a one-coat, waterproof primer that works with most metal roofing materials, including galvanized steel and aluminum. It's ready to paint in just one hour and can cover 125 square meters with a 10-liter tub.
3: Durashield Grey Rubber Based Waterproof Roof Paint
The previous paints are fantastic for big roofs. If you just want to revitalize your garage's corrugated metal roof, this Durashield rubber-based paint is worth a try.
With a brush or roller, you may apply Durashield's flexible elastomeric coating to most surfaces without needing a primer. Furthermore, this paint will last up to ten years without rusting.
The weather in the United Kingdom is also ideal for the dura shield, which may be applied within a temperature range of 5-25°C and even if it rains soon after.
You can't select a different color for the Durashield, but it doesn't have to be grey. If you do not need color, this won't be an issue.
However, don't be fooled by the low price. However, because it's made of rubber, coverage is significantly less than that of water-based paint; in fact, a little 3m x 6m garage only requires five or six 5-liter tins.
You might also want to know: What’s The Best Paint To Paint Colorbond Roof
Final Thoughts
The Wethertex CP80 stands out in this comparison because it offers a 20% longer lifespan than the nearest competition, and when you're doing any roof work, the fewer times you have to do it, the better.
Rust-Oleum is good paint, and while it may require a primer, the topcoat is typically more expensive.
If you don't mind the color and have a small patch to cover, Durashield is worth considering, but know that it has a low coverage rate, which might end up being very costly. If you'd like to learn more about the many forms of paint for metal roofs, Coatings.co.uk has put up a guide on their website, and while this is not specific to any one type of paint, the idea is the same.
The best paint for a corrugated metal roof is going to depend on the type of metal being used. If you have galvanized steel, then you must choose a high-quality zinc coating with an anti-rust agent and rust inhibitor. The most common options are clear coatings or paints in colors like white, black, green, brown, blue, or gray. Some people also opt to use aluminum which has been treated with an electrochemical process to form a protective oxide layer against corrosion from rainwater or saltwater exposure.
I have a corrugated metal roof that was siliconized polyester coated. Over half of that pigment is gone. With rust around each of the screws.whay do you recommend. I live about 10 miles from the gulf of Mexico in Louisiana. Thanks!