Two commercial buildings in Kalamazoo can receive the same metal roof coating product and arrive at completely different outcomes ten years later. What is not identical is the surface preparation, the application thickness, and the coating chemistry matched to the building.
At JM Roofing Solutions, we apply metal roof coatings on commercial and industrial buildings across Kalamazoo, MI, using systems engineered to hold in Michigan’s climate. Call us at (269) 361-8305 and let us assess your metal roof before the application conversation even starts.
Causes of Metal Roof Coating Failure
Early coating failure on a commercial metal roof almost never traces back to a defective product. It traces back to one of three installation failures: inadequate surface preparation, insufficient dry film thickness, or a coating chemistry that was not right for the substrate or the climate. Any one of those failures produces a coating that looks fine at installation and starts showing problems within two or three Michigan seasons.
Surface preparation is the most commonly skipped step and the one with the most direct impact on coating adhesion. A metal roof in Kalamazoo that has been through several winters carries surface oxidation, biological growth in the valleys between ribs, residual dirt and oils from years of rooftop equipment access, and in many cases patches of existing coatings or sealants that were applied at various points in the roof’s history. Coating applied over any of those conditions is coating applied over a barrier between itself and the metal substrate. It does not bond to the metal.
Depth Matters
Every professional metal roof coating system has a specified dry film thickness that must be achieved across the entire coated surface for the product to deliver its rated performance and warranty coverage. Dry film thickness is what remains after the liquid coating cures and the water or solvent carrier evaporates. It is the actual protective layer on the roof, and it has to reach the manufacturer’s minimum specification consistently across every square foot of the application.
Applying a coating too thin is the easiest way to reduce material cost on a project without the building owner knowing anything has changed. The roof looks coated. The color is uniform. Nothing about the finished surface tells you that the dry film thickness is forty percent below specification.
Coating Chemistry
Not all metal roof coating products perform the same way on the same substrate, and coating chemistry is the reason.
Acrylic elastomeric coatings are the workhorse category for commercial metal roofs in Michigan. They bond well to prepared metal substrates, accommodate the thermal expansion and contraction that southwest Michigan’s temperature range demands, and deliver the reflectivity that reduces cooling loads on industrial buildings running through a Kalamazoo summer. Systems like Conklin’s acrylic coating line have decades of documented performance on commercial metal roofs in climates identical to what Kalamazoo experiences, which is a meaningful data point when evaluating what goes on a building that needs to perform for twenty or more years.
Silicone coatings offer superior ponding water resistance and maintain their reflectivity in UV-heavy environments without the chalking that some acrylic formulations develop over time. For a metal roof with standing water concerns or one that has historically shown issues with ponding at low points between ribs, silicone chemistry addresses that problem in a way acrylic does not.
Matching the chemistry to the building’s specific conditions rather than defaulting to whichever product is most familiar is what separates a properly specified coating project from one that just happened.
Long-Lasting Metal Roof Coating
The difference between a metal roof coating in Kalamazoo, MI that holds for twenty years and one that fails in three is not the product. It is the preparation, the application thickness, and the chemistry matched to the building.
At JM Roofing Solutions, we apply commercial and industrial metal roof coatings with process standards that produce long-lasting results. Call us at (269) 361-8305 and let us evaluate your metal roof and put together a coating specification that fits your building.
FAQ
How do I know if my metal roof needs coating or has already passed the point where coating is viable?
A professional assessment that checks for structural rust, panel integrity, and seam condition determines whether the substrate can still support a coating system or requires restoration or replacement first.
Can a metal roof coating be applied in sections on a large industrial building?
Yes, large commercial and industrial metal roofs can be coated in phases, allowing the project to be scheduled around operational requirements or budget cycles without compromising the finished system.
How many coats are typically required on a commercial metal roof coating project?
Most professional metal roof coating systems require a base coat and finish coat at minimum, with some specifications calling for a third coat at seams, fasteners, and penetrations where additional thickness is needed.
Does a metal roof coating eliminate the need for seam repairs before application?
No. Active seam failures and open lap joints must be addressed with sealant and reinforcing fabric before coating, as the coating product alone is not designed to bridge open seam gaps.