Metal roof painting is an important part of roof maintenance. It extends the roof’s lifespan and effectively protects it from Finland’s variable weather conditions. Regular maintenance painting prevents rust and saves you from costly roof repairs in the long run. The most important steps in metal roof painting are thorough preparation work and careful painting.
In this article, we’ll take a closer look at metal roof painting and its work stages. We’ll go through how metal roof painting is done and when the work should be carried out.
Yes, metal roof painting is worthwhile especially when the paint surface starts to flake or fade. It’s a cost-effective way to extend the roof’s lifespan and prevent rust. The typical maintenance interval for metal roof painting is 15-20 years and depends mainly on previous paint layers and the surrounding environment.
Metal roof spray painting is a common and effective way to achieve an even finish. Especially painting a flaking metal roof should be done in time, before the damage progresses to the metal structure itself.
Washing a metal roof before painting is an essential work stage that ensures the paint’s adhesion and durability. Paint won’t adhere properly to an unwashed surface, which can cause the coating to come off prematurely.
Metal roof washing is done according to Väriset’s process with a pressure washer and cleaning agent designed for metal roofs before painting. Thorough washing ensures that the new paint surface lasts long and stays clean year after year.
Metal roof washing and painting typically cost €20–40/m². The price is affected by the roof’s condition, surface area, paint quality, and chosen work method. Washing typically accounts for about €5–10/m² and painting €15–30/m². If the roof has a lot of rust or difficult structures, the price of metal roof painting may increase somewhat. You can find more detailed pricing information in our article: Metal Roof Painting Price.
Metal roof painting typically costs €3,000-6,000 through Väriset. Väriset offers metal roof painting at a competitive price, which is determined by the roof’s size, condition, and structure. The exact cost is always best determined on-site – request a free estimate visit here.
The best time for metal roof maintenance painting is from spring to early fall, when weather conditions are stable, dry, and warm. In dry weather, paint adheres most effectively and dries evenly. The ideal application temperature for paint is around +10–25°C and relative humidity around 50%. While 50% is optimal, humidity below 80% is generally an acceptable upper limit for painting work. Metal roofs should be painted in spring or early summer to avoid fall rains and overnight moisture.
But can you paint a metal roof in autumn? Yes, you can – but only if the weather stays sufficiently warm and dry, and there are no night frosts. Painting metal in cool and humid weather can weaken the durability of the result, so timing should be carefully planned.
A rusty metal roof can be painted if the rust is superficial and the roof is structurally sound. Small rust spots are removed mechanically and treated before painting to ensure a durable coating. Damaged metal sheets are replaced with new ones if necessary.
In our previously published guide on metal roof rust removal, we emphasize the importance of post-removal treatment:
“After rust removal, all bare metal areas must be primed with rust-preventive primer, to prevent rust from starting again.”
If rust has spread over a large area or the metal structure is damaged, painting alone is no longer enough – the roof should then be renewed either partially or completely.
Metal roof painting done by a professional typically takes 2–6 days, depending on the roof’s size, structure, and weather conditions. The duration of the work is determined by how extensive the preparation work needs to be and how effectively the weather allows work to proceed.
Done yourself, roof painting can take considerably longer. Due to weather, the work may be delayed if you have to wait for dry conditions. Additionally, work may progress more slowly if you don’t have professional-grade tools and methods. A well-planned schedule and the right tools significantly speed up the job.
Painting a metal roof yourself may be tempting for cost reasons, and done correctly, you can save money. However, the work requires care, appropriate tools, and favorable weather conditions.
DIY painting can ultimately become expensive if the preparation work is done inadequately or the paint doesn’t adhere properly. A failed paint job can result in the entire roof needing to be treated again. Hiring a professional brings certainty to the result and can save both time and money in the long run.
Done yourself, roof painting can also be a safety risk if you don’t have proper safety equipment, such as harnesses or roof ladders. Professionals have the training and equipment to work safely even in high and challenging locations.
The price of a new metal roof is made up of several factors: material choices, the extent of installation work, the roof’s size, and any preparation work, such as removing the old roof or repairing structures. A metal roof renovation can typically cost 15,000–20,000 euros.
But when should an old metal roof be renewed – and when is painting alone enough? Renewal is timely if the metal sheets are rusted through over a large area or the structures are damaged. However, if the roof is intact and the rust is only superficial, painting the old metal roof is a significantly more cost-effective solution.
Metal roof painting is a sensible investment for protecting the roof and improving its appearance. Painting extends the roof’s lifespan and can prevent costly repairs. Whether you’re considering metal roof washing, doing the painting yourself, or hiring a professional – thorough preparation work and proper timing are the keys to success. If you want to ensure a quality result, contact Väriset and request a free estimate!
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