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Understanding Metal Roof Coatings

One of the best things a property owner can do for their metal roof is to coat it. Not only is it a cost-effective way to prevent leaks and corrosion, but it also helps to moderate the building's internal temperature.

Metal roof coatings trap rust, keeping it from spreading and eroding further areas of the roof. Coatings also seal the metal and repair minor leaks, lightly compromised seams, and cracks.

Reflective coatings moderate temperature, which alleviates the expansion and contraction cycle triggered by a wide range in temperature. This helps keep fastener holes and sealants from deteriorating.

How long will a coating protect my metal roof?

A properly applied roof coating can increase the life of your metal roof by 10 years or more. Generally speaking, it is recommended that you re-coat your metal roof every 5 - 12 years to ensure it is adequately protected. However, this is dependent on the type of roof, the thickness of the coating applied, and your area's weather conditions.

Can I coat my metal roof if it's rusted?

Yes, but before applying any coating, heavily rusted areas should be removed or treated with a corrosion inhibiting primer. If the roof has “white rust,” the roof can be coated after a thorough cleaning.

Can I apply the coating myself?

We strongly advise against doing roof work yourself. Instead, hire a professional contractor with extensive experience to apply roof coatings. They will know how to properly prepare the roof, how to apply the coating properly, will have manufacturer warranties, etc.

Read on: Metal Roofing FAQs: Everything You Need to Know