Nail migration is the bane of my existence on inspections, especially after a roof job. I’ve lost count of how many times I’ve walked a property a week after the crew’s packed up, only to spot a shiny nail head poking out of the mulch or wedged in the cracks of a paver. It’s like they have a sixth sense for hiding until just the right moment.
Mulch really is the worst for this. I had one place where the homeowner swore up and down that every stray nail was “fresh,” but when I dug around, half of them were rusty and bent—probably from an old fence demo years before. Still, perception is reality for folks walking their yard in flip-flops.
I’ve tried those adjustable-height magnetic sweepers, but honestly, they’re hit or miss in thick mulch or gravel. The standard rolling bar works fine on pavement or short grass, but once you get into landscaping, it’s more about patience and luck than equipment. Sometimes I’ll use one of those telescoping magnets (the kind mechanics use for dropped bolts) to poke around in tight spots, but it’s tedious work.
One trick I picked up from an old-timer was to wet down the mulch before sweeping—supposedly it helps bring nails closer to the surface. Not sure if there’s any science behind it, but it seemed to help once or twice. Still, there’s always that one last nail waiting to ruin someone’s day.
I get why homeowners are so particular about it though. I’ve seen what a roofing nail can do to a tire...or worse, a bare foot. But like you said, with older properties or deep beds, 100% clean just isn’t realistic. Sometimes you just have to set expectations early and be ready for a callback or two.
Sometimes you just have to set expectations early and be ready for a callback or two.
That’s the part that always gets me—no matter how thorough you are, there’s always a stray nail or two that pops up later. I’ve had homeowners swear the crew “missed a whole pile,” but half the time it’s old debris like you mentioned. Ever notice how folks get way more upset about nails than, say, leftover shingle scraps? Maybe it’s just the risk factor. I do wonder if there’s a better tool for mulch, though. Those magnets are great on driveways, but in bark chips? Might as well be hunting for treasure with a blindfold.