How Do You Repair a Rusted Metal Roof?

Rusting Metal Before a Metal Roof Coating

Blemishes That Need to Go

Metal roofing systems enjoy a well-deserved reputation for durability and efficiency. That doesn’t mean they don’t face their fair share of problems, however! Today, we’ll be talking about one of the most aggressive and challenging threats metal roof owners experience: rust. We’ll also talk about how to find a helpful metal roof coating to slow the corrosion process.

Let’s dive in!

Can Metal Roofs Rust?

Most metal systems utilize steel or aluminum, which offer very capable protection against the weather for a relatively modest price. Considering the metals’ reputation for durability and longevity, you might be tempted to think that nothing can harm these roofs. Given enough time however, metal roofs do eventually start to rust.

“So what’s the big deal?” you may wonder. A little rust never hurt anybody right? Unfortunately, rust slowly eats away at the integrity of your metal panels. Holes form and expand slowly, creating opportunity for leaks and other unpleasant consequences.

How Do You Take Care of a Metal Roof?

While few forces can stop rusting indefinitely, there are some solutions that can delay it. As an example, think of the anode rod inside your home’s water heater. Your water heater service specifically installs this rod to attract rust away from other parts of the tank. Roofing solutions work in a similar way, slowing the development of rust in your metal panels by drawing it into a specialized coating.

Can You Coat a Metal Roof?

Residential and commercial roof coatings create a protective barrier that shields your metal panels against the elements. There are quite a few threats that want to shorten the life of your hardy roofing system, but these coatings block them out. While the work may be too challenging for an inexperienced homeowner, professional roofers can perform these specialized coatings in a day or two.


How Much Does it Cost to Coat a Metal Roof?

Roof coating for metal systems depends on a couple of factors. First, the size of the roof affects the variable price. Next, the type of coating you wish to have applied also greatly impacts the end cost. We’ll talk more about the different types of coating in a bit, but a metal roof coating may range anywhere from $0.15 to $2.50 per square foot. That doesn’t include the cost of installation, which Homeadvisor states may go as high as $3.00 per square foot.

Best Options

The Best Metal Roof Coating

Many businesses and homeowners automatically jump to the obvious question “What’s the best metal roof coating on the market?” While there are plenty of choices to pick from, the best solution for the job depends on your priorities. If you’re looking for a low-cost coating with a wide color spectrum and excellent reflective capabilities, you may want to choose an acrylic solution.

Those who need a commercial roof coating that offers protection against foot traffic may prefer a more premium polyurethane coating instead. Almost all the coating solutions provide capable protection against rust.

The Best Metal Roof Coatings

  • Silicone
  • Polyurea
  • Acrylics
  • EPDM Liquid Rubber


What is the Best Sealer for Metal Roofing?

Dealing with leaks is a frustrating, time-consuming project. This is made all the more frustrating when the material in question is metal, which boasts incredible weather protection. Thankfully, there are very affordable options for preserve your energy-efficient metal roof.

When it comes to choosing a metal roof coating for leaks, many look to silicone or polyurea for the best results. Out of all the options available, these elastic materials offer some of the best weathering protection. Many flat roofs even utilize these materials for protecting against standing water, meaning they can be trusted when it comes to defending against leaks.

The Coating Process

So what sort of work goes into protecting a metal roof against rust? Believe it or not, your manufacturer may have taken care of some of the work for you. Knowing metal’s tendency to rust after decades of exposure, they cleverly coat the material with rust-resistant material. Steel for instance, comes in two anti-rust varieties: galvalume (coated in aluminum) and galvanized (coated in zinc).

After your roof has advanced in age however, there’s a high chance you’ll need to have it coated again. Thankfully, the process can be completed in two days (or less) and requires very little in the way of metal roof coating equipment.

  • First, the roof is pressure washed to remove dirt and other grime.
  • Next, a primer coating is applied (may not be necessary for silicone).
  • Finally, the coating professional applies one to two coats of protection.

Coatings may be applied with spray or roller brushes. It’s almost always best to have a professional do it!

A Gorgeous Roof After a Metal Roof Coating

Want an Estimate on a Metal Roof Coating?

At Innovative Construction Pros, we provide all kinds of solutions to preserve your roof and protect it against the elements! If you’d like to learn more about defending your durable metal system, talk with one of our knowledgeable experts at 855-529-7663. Find out whether a Montgomery, AL metal roof coating could be right for you.