I’ve run into that same issue—decking looks fine on the surface, but the meter tells a different story underneath. Had a case last fall where everything passed the tap and poke tests, but the moisture readings were way off in one corner. Pulled up a couple boards and sure enough, the joist was half gone from rot. I still rely on the old methods first, but I’ll admit, the meter’s saved me from missing some hidden problems. Wouldn’t call it essential for every job, but on older decks or spots with past leaks, it’s worth dragging out.
- I get the appeal of moisture meters, but I’m not totally sold on them for every situation.
- My experience—sometimes those readings can be misleading, especially if you’re dealing with older wood that’s seen a lot of weather. I’ve had meters throw up red flags in spots that turned out to be just fine once we opened things up.
- I still lean on a thorough visual check, especially around fasteners and seams. If there’s any sign of staining or softness, that’s usually enough for me to pull a couple boards and see what’s really going on.
- For me, the meter’s more of a backup tool. I’ll use it if something looks off or if the deck’s got a history of leaks, but I don’t trust it as the main test.
- Maybe it depends on the type of decking too. Plywood vs plank, age, all that stuff changes how reliable those readings are.
- Not saying they’re useless—just that I wouldn’t skip the hands-on checks, even if the meter says everything’s fine. Sometimes your eyes and a pry bar tell you more than any gadget.
I’ve run into the same thing with moisture meters—sometimes they’re spot on, other times they just make me second-guess what I’m seeing. Especially with older decks, like you said, the readings can be all over the place. I had a job last year where the meter kept flagging a section of 60s-era plank as “wet,” but when we pulled it up, it was bone dry and solid. Ended up being some old stain that threw off the reading.
For me, I always start with a slow walk across the deck, checking for any bounce or flex underfoot. If there’s any give, that’s usually a sign to dig deeper. Around fasteners and seams is where I see most issues too—rust stains or even just a little softness around nails is enough for me to grab a pry bar and check underneath. I’ll use the meter if something looks suspicious or if there’s been a leak history, but I don’t rely on it alone.
I do think plywood vs plank makes a difference. Plywood seems to hold moisture differently—sometimes you get surface readings that look bad but it hasn’t penetrated through. Plank decks, especially old ones, can hide rot between boards where the meter won’t pick it up at all.
One thing I’ve started doing is using an awl or screwdriver to poke at suspect spots. If it sinks in easily, that’s usually all I need to know. Visual checks plus hands-on probing have saved me from missing hidden rot more than once.
Curious if anyone’s tried thermal cameras for this? I’ve heard mixed things—some say they help spot hidden moisture, others say it’s overkill for decking prep. For now, I’m sticking with eyes, hands, and backup gadgets... in that order.
Curious if anyone’s tried thermal cameras for this? I’ve heard mixed things—some say they help spot hidden moisture, others say it’s overkill for decking prep.
I’ve wondered about thermal cameras too, but honestly, I’ve never felt like the extra tech was worth it for decks. Like you said, nothing beats just poking around with a screwdriver or awl. I’ve had meters tell me a spot was fine, but my boot went right through it. Trust your gut and your hands—gadgets are just backup. Your process sounds solid to me.