I’ve slapped a few of those “eco” coatings on sheds and garages, and honestly, the white ones do seem to drop the temp inside. My buddy joked his mower finally stopped sweating in July. Prep still sucks, but the cooler shed is real.
I get the appeal of those white coatings—seen a few folks swear by them for keeping sheds cooler. But I’ve also run into situations after a hailstorm where that “eco” layer chipped off in big patches, especially on older metal. Then you’re left with a patchwork mess and exposed spots that rust faster than you’d think. I’m more of a fan of adding a radiant barrier under the roof if you’re already doing repairs. It’s a pain to retrofit, but it holds up better long-term, at least in my experience. Prep is always a pain, though... no getting around that.
That’s been my experience too—those white coatings look great at first, but after a couple Texas hailstorms, I had more bare metal than coating left. The patchy look drove me nuts, and the rust set in way faster than I expected. I ended up going with a radiant barrier when we replaced some panels last year. It was a hassle getting it up there, but honestly, it’s held up way better through storms and the summer heat. Prep work is always the worst part, but skipping it just means more headaches down the line... learned that the hard way.
White coatings always seem like a quick fix, but I’ve seen the same thing—after a couple of bad storms, they just don’t hold up. I manage a few properties around here, and every time someone tries to save a buck with those coatings, we’re back up there patching or replacing panels within a year or two. The radiant barrier is a solid call, especially with the heat we get. It’s a pain to install, but the difference in attic temps is noticeable.
Prep work really is the make-or-break step. I’ve had crews try to rush it, and it always comes back to bite us—either leaks, rust, or just stuff not sticking right. It’s tempting to cut corners when you’re staring down a long day on the roof, but it never pays off. If you’re dealing with older panels, I’ve found it’s worth taking the extra time to clean and prime everything before putting anything new on. Costs a bit more upfront, but way less hassle down the road.
Prep work really is the make-or-break step. I’ve had crews try to rush it, and it always comes back to bite us—either leaks, rust, or just stuff not sticking right.
Totally agree on the prep. I’ve learned the hard way that skipping a thorough cleaning means you’re basically setting up for more repairs later. Sometimes it feels like overkill, but it’s saved me a lot of headaches. White coatings sound great on paper, but in practice, they just don’t last in our weather.
