I hear you on the moisture meters—mine’s been all over the place after a storm, too. I’ve started tapping boards with a screwdriver handle to listen for hollow sounds, but sometimes I second-guess myself. Do you ever seal up small cracks before underlayment, or just replace the whole board if it’s questionable? I always wonder if I’m being too cautious or not enough.
- Totally get the second-guessing—sometimes those hollow sounds are subtle.
- If it’s just a hairline crack and the board feels solid, I’ll seal it up with wood filler.
- Anything soft or flexing, I swap out.
- I’d rather be a little too cautious than risk a call-back later... but yeah, sometimes I wonder if I’m overdoing it.
- Storms really mess with readings—moisture meters can be all over the map for days.
I’ve always been a little skeptical about just filling hairline cracks, even if the board feels solid. Maybe it’s just from seeing too many “hidden” issues pop up later, but I’ve had a couple jobs where what looked like a harmless crack turned out to be the start of something bigger. One time, I sealed up a tiny split on a back deck—felt rock solid, no flex at all. Six months later, the homeowner called because the board had warped and pulled a fastener right through the underlayment. Turns out, moisture had been creeping in through that crack the whole time.
I get wanting to avoid ripping out boards unnecessarily—costs add up, and sometimes it really does feel like overkill. But I’ve started using a little pick or awl to probe around even the smallest splits. If there’s any give, or if the tool sinks in deeper than expected, I just bite the bullet and swap it. Maybe I’m just paranoid after getting burned, but I’d rather toss one extra board than have to come back for repairs.
The moisture meter thing drives me nuts, too. After a big storm last fall, I was getting 25% readings on one half of a deck and 12% on the other, same day, same wood species. I ended up waiting an extra week before underlayment just to be safe, but honestly, it’s hard to know when you’re being cautious versus wasting time.
Curious if anyone’s had luck with those pinless meters? I’ve stuck with the old two-pin style because I trust it more, but sometimes I wonder if I’m missing something. Decks are tricky—sometimes you feel like you’re chasing ghosts trying to get everything just right.
Honestly, I think you’re doing it right by being cautious. I just went through my first deck project and, man, I learned real quick that “just filling” cracks is basically a gamble. I tried patching a couple hairline splits with wood filler because I didn’t want to waste material, but sure enough, after the first hard rain, one of those boards started to cup and the filler popped right out. Ended up having to pull it anyway—so much for saving time and money.
I get the frustration with moisture meters. Mine’s the two-pin type too and it’s all over the place after any weather. Sometimes I wonder if it’s even worth checking, but then again, I’d rather wait a few extra days than deal with rot or warped boards down the line. Haven’t tried a pinless meter yet, but honestly, unless someone can show me side-by-side results, I’m not convinced.
At the end of the day, ripping out one extra board hurts less than a full redo later. Feels like overkill sometimes, but peace of mind’s worth it.
I hear you on the wood filler—tried that myself a couple years back and it just doesn’t hold up, especially if the board’s already got movement or moisture issues. I’ve gotten to the point where if a board’s questionable, I just swap it out. Costs a bit more up front, but like you said, it’s better than dealing with a bigger headache later.
About those moisture meters, I’m not totally sold either. I’ve used both pin and pinless, and honestly, the readings can be all over the place depending on where you stick it or how the weather’s been. Sometimes I just go by feel—if the wood’s cool and damp to the touch, I wait. Not exactly scientific, but it’s worked out so far.
Curious if anyone’s had luck with sealing the underside of the boards before putting down underlayment? I’ve heard mixed things—some say it helps, others say it traps moisture. Wondering if it’s worth the extra step or just overkill.