Roof Coatings in Madison, WI

Cool roof coatings reflect sunlight instead of absorbing it, so the membrane underneath runs cooler and expands and contracts less over a day. Less movement means fewer stress cracks at seams and flashing, which is where most flat roof leaks start. A white or light coating also takes some load off the building's cooling in summer. On a commercial roof that is still structurally sound, coating is a way to add protection without tearing anything off.

We use acrylic, silicone, and polyurethane coatings, and we pick between them based on the roof, not on habit. Silicone goes on roofs that hold standing water. Acrylic suits sloped or well-drained roofs where cost and easy recoating matter more. Polyurethane handles foot traffic and mechanical wear. Before any of it, we test adhesion on the existing surface, because a coating that does not bond to the substrate is just an expensive layer of paint.

That depends on the coating type, how thick it was applied, and the condition of the roof it went on. A coating over a dry, sound membrane with repaired flashing lasts far longer than the same product sprayed over trapped moisture or open seams. We measure film thickness in mils as we go, because thin spots fail first. Regular maintenance and a timely recoat keep the leak protection going well past the original application.

The main families are acrylic, silicone, polyurethane, and asphalt-based aluminum coatings. Acrylics are water-based, breathable, and easy to reapply. Silicones are the go-to for ponding water and long UV exposure. Polyurethanes come in aromatic and aliphatic forms, with the aliphatic top coat holding color and resisting wear. Aluminum coatings are the traditional choice over built-up and modified bitumen roofs. Each has a substrate it suits and a substrate it does not.

Longer than most people expect on a well-prepared roof, and shorter than the brochure says on a poorly prepared one. Surface prep decides most of it: power washing, priming where needed, sealing seams and penetrations, and letting everything dry before the first coat. Madison's median home was built in 1979, and plenty of commercial roofs in town are of similar age. Those roofs can still take a coating if the deck and insulation underneath are dry and sound.

We pick the coating for the roof in front of us rather than for the forecast. Where water ponds after a rain, silicone holds up because it does not break down sitting wet. Where the roof drains well, acrylic gives good reflectivity and simple recoating. Where rooftop equipment brings foot traffic, polyurethane resists the wear. Our commercial roof coating services start with a walk of the roof, and the coating choice follows from what we find there, in Madison or Middleton alike.