Metal Roof Coatings
A metal roof coating protects your metal roof by encapsulating rust even if the roof is heavily corroded. It repairs leaks by sealing cracks and seams. Applying an elastomeric coating is a cost-effective way to preserve your metal roof without the cost and disruption of tearing off an existing roof and replacing it.
Types of Metal Roof Coatings
Acrylic is a water-based, cost-effective solution for metal roofs. They can be tinted easily and are not slippery when damp but can't handle ponding water which isn't a problem with metal roofs. Butyl is a solvent-based, vapor retarder and is suitable for locations with high humidity. Polyurethane is great for sealing fasteners, flashings and coating gutters. Silicone performs well in areas that pond water and is great for low-slope metal roofs or gutters.
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Frequently Asked Questions
Metal roofs are typically coated anywhere from 6 to 12 years after installation and much earlier if corrosion has started.
Service life varies with environment and type of coating. Warm, humid and corrosive environments may necessitate an earlier recoat.
Once coated, consider re-coating every 10 to 15 years. Recoats can cost less since the contractor is just spraying another layer and not doing any of the usual prep.