Metal roofs are popular not just because of their good looks, but also because they are supposed to be durable and low maintenance. So why do they sometimes develop unsightly rust or corrosion? The following guide can help you ensure your roof remains in good condition.
Check your metals
When other metals touch a steel roof, a slow electrical charge occurs that can lead to corrosion and rust. The simplest way to avoid this is to make sure that gutters and other rooftop items are either not made of metal or also made of steel. Your roof should also have a galvanic coating applied to it before it is installed. This cuts down on the chances of metal-on-metal corrosion, although it doesn't eliminate the possibility since coatings can become damaged over time.
Keep it clean in salty areas
If you live near the ocean, there is another threat to your metal roof – salt. Salt in the air can eat away at paint and coatings on the roof, eventually leading to pitting and rust. This is similar to the types of salt damage you see on cars in ocean front areas. If you don't get a lot of rain in your area, take the time to rinse off your roof with the hose every few weeks. This will cut down on the chances of pitting.
Fix any trauma
Even in areas far from the ocean, paint damage can occur. The most common cause will be trauma, such as from hail or falling branches. Water can work its way into a small scratch, making it worse and eventually revealing bare metal. Once bare metal is exposed, rust is a possibility. Inspect your roof visually for damage at least once a year or after any major storms. You can purchase touch-up paint that matches your roof in case you need to make any repairs.
Consider a re-coating
A durable silicone coating is clear and prevents all types of rust and corrosion. It can be applied over your roof as it is, or you can have the roof repainted first. Silicone forms a barrier against water and other metals and protects against minor trauma, such as from smaller hail stones.
Talk to a roofer like Acoma Roofing to see if a silicone coating treatment sounds like a good option for your metal roof. They can also help you with inspections or any other maintenance needs you have with your metal roof.