I’ll never forget the morning I padded barefoot across the living room and felt it. The floor wasn’t flat anymore.
Running my hand along the planks, I could trace little ridges where the boards had started curling up at the edges, creating these subtle waves across what used to be smooth, gorgeous old pine.
At first, I thought maybe I’d spilled something and not wiped it up properly, or that the dog had tracked in water I hadn’t noticed. But then I started seeing gaps near the windows, and in other spots, the boards looked almost swollen.
Turns out, it wasn’t anything I did wrong. It was just Norfolk being Norfolk. Living near the coast means beautiful sunsets and salty breezes, but it also means humidity. Lots of it.
The relative humidity here peaks in August at around 74%, and
Norfolk has a humid subtropical climate with hot humid summers. That moisture-heavy air? It’s been quietly doing a number on my farmhouse floors the whole time, and I had no idea until the wood started talking back.
Figuring Out What Was Actually Happening
Once I knew something was off, I started researching like crazy. I learned that what I was seeing on my floors had a name: cupping.
The characteristic “U” shape of a cupped floor happens when the sides of the boards curl up, and high indoor humidity is one of the most common causes, as wood floorboards absorb moisture from the air and swell. Wood is basically a sponge.
In high humidity, your wood floors will absorb more moisture, causing them to expand and cup.
So there I was, staring at my beautiful old floors, trying to decide what to do. Should I try to fix them myself? Call someone? Rip everything out and start over? I grabbed a hygrometer from the hardware store and started taking readings around the house. Sure enough, we were sitting at around 65% humidity inside on most days.
Indoor relative humidity should be kept below 60 percent, ideally between 30 percent and 50 percent, according to EPA guidelines.
That’s when I realized this wasn’t a quick fix. The floors needed to dry out first, and I needed to get the humidity under control, or whatever repair I did would just fail again in a few months. I bought a decent dehumidifier and ran it constantly for about six weeks, checking the moisture levels in the wood every week with a little pin-style meter I borrowed from a neighbor.
Watching the readings slowly drop was weirdly satisfying. The cupping started to flatten out a little on its own as the boards released that trapped moisture.
But some sections, especially near the bathroom and the kitchen, weren’t bouncing back. I had to make a call: try sanding and refinishing, replace the worst boards, or just live with it and see if it got worse.
After a lot of back-and-forth and watching way too many YouTube videos, I decided the best route was a professional assessment. That’s when I ended up connecting with a local team.
The flooring installation Norfolk crew that came out was honest about what could be saved and what couldn’t. They explained that trying to sand cupped floors before they’re fully dry is a rookie mistake, because the wood can crown the other way once the moisture stabilizes.
The consultation was free, and they didn’t pressure me into anything, which I appreciated.
They also pointed out that my subfloor had some moisture creeping up from the crawl space. I hadn’t even thought to check down there, but it made total sense.
Moisture from a damp crawl space can cause the bottom side of wood planks to absorb moisture, leading to cupping. We ended up replacing about a third of the boards in the worst areas and refinishing the rest once everything was bone dry.
What I Learned About Living with Wood Floors Near the Coast
The whole process taught me that coastal humidity affects hardwood flooring in ways you don’t realize until it’s too late.
In coastal areas where humidity levels tend to be higher due to proximity to the ocean, floors may expand and contract with the changes in moisture levels.
I also learned that this isn’t a set-it-and-forget-it thing. Now I keep that dehumidifier running from late spring through early fall, and I monitor the indoor humidity religiously. I set up a smart hygrometer that sends me alerts if things creep above 55%.
It sounds obsessive, but after spending what I spent on repairs, I’m not taking chances.
Another thing that helped was sealing up the crawl space properly. We added a vapor barrier down there and improved the ventilation, which made a massive difference. The installer recommended it, and honestly, I wish I’d done it years ago.
According to USDA Forest Service research on wood moisture, wood exchanges moisture with air depending on relative humidity and temperature, and this moisture relationship has an important influence on wood properties and performance.
I also started being way more careful about wet shoes, spills, and even how I water my plants. Every little bit of extra moisture adds up when you’re already fighting the climate. I put mats by all the doors and started wiping up water immediately instead of letting it sit.
The refinished floors look amazing now. The new finish has a bit more protection against moisture, and the color evened out beautifully once everything was sanded down. Walking across them now feels like how it should have felt all along: smooth, solid, and level. No more weird ridges or spongy spots.
Looking back, I’m glad I didn’t try to DIY the whole thing. I probably would have sanded too soon, or missed the subfloor issue entirely, and ended up right back where I started. Sometimes it’s worth calling in people who know what they’re doing, especially when you’re dealing with old wood and a challenging climate.
If you’re living in an old house near the coast and you’ve got original wood floors, do yourself a favor and grab a hygrometer. Check your crawl space. Pay attention to how the floors feel underfoot when the weather changes.
Catching this stuff early makes all the difference. I learned that the hard way, but at least now my floors are protected, and I know what to watch for going forward.
And honestly? I love them even more now, knowing they can stand up to whatever Norfolk’s humidity throws at them.
