How are you guys sealing the bottom of custom wood bath surrounds?

I've done several of these wood surrounds and you definatly cannot trust just the poly to handle the moisture where the oak meets the floor. Capillary action is your enemy here; water will find its way into that tiny gap and sit there, eventually turning the bottom of your oak panels black from rot. You should absolutely run a hidden bead of **100% silicone** behind the wood. I ussually set the panel, then run a thin bead right at the floor-to-wall junction before the final trim goes on. It needs to be a physical barrier, not just a surface coating.

For the finish, if you used a standard interior poly, you might want to reconsider a few extra coats of a marine-grade spar varnish on those bottom edges. Red oak especially is notorious for reacting to moisture. If a single drop gets past the finish, the tannins will react and you'll get those ugly dark streaks that are impossible to sand out without stripping the whole thing. Make sure you're sealing the end grain on the bottom of those panels specifically, as that's where the wood drinks up the most water.

Regarding the access panel, magnets can get sloppy over time if the wood moves even a fraction of an inch due to seasonal humidity. I prefer using **spring-loaded touch latches** or even a French cleat system if you have the depth. Touch latches keep the panel flush and tight against the frame, and you don't need any visible hardware. Just push the corner of the panel and it pops out far enugh to grab. It makes the lines much cleaner than magnets which can sometimes leave the panel slightly recessed or crooked. That curved end usually requires alot of scribing to the floor to make it look right. If you haven't permanently fixed everthing yet, try to get the bottom edge of the oak as tight to the flooring as possible. If the gap is too big for comfort, a very thin, flexible shoe molding stained to match can bridge that gap and provide an extra layer of splash protection, but a tight scribe with a hidden silicone seal is always the better way to handle it.

I'm trying to wrap my head around those touch latches. Do you have to route out a specific spot in the oak frame for those to sit flush, or do they just screw onto the back? I'm worried about accidentally drilling trough the front of the panel if it's too thin.

Also, since you mentioned the tannins in red oak turning black, woud using white oak have been a safer bet for a bathroom project like this? I've heard it's naturally more water-resistant but I'm not sure if the dark stain takes to it the same way.

To avoid drilling through thin panels for those latches, just epoxy a small block of scrap wood to the back of the panel first. It gives your screws enough depth without the risk of a blowout on your finished side.

White oak is definitly the superior choice for wet areas since its cellular structure is naturally water-resistant, unlike red oak wich acts like a bunch of tiny straws. If you stick with the red oak, make sure you're back-priming every single square inch. I've seen high-moisture bathrooms warp panels in a single season beacuse the back was left raw. It’s all about balancing that internal tension so the wood doesn't cup.

I always back-prime the entire panel with a couple coats of poly before it even touches the tub frame. People forget that the humidity trapped behind the paneling can be just as brutal as the splashes on the front. For that curved section, did you kerf-cut the back of the oak? I've found that kerfing makes the scribe way more manageable since the wood isn't fighting you. It helps keep those floor gaps consistent when things start shifting with the seasons.

If you stick with magnets for the access panel, try adding a couple of small brass alignment pins or headless nails to the frame. It stops the panel from shifting or sagging, which is ussually why magnet setups start looking sloppy after a season of humidity changes.

For that floor gap, definitely use a neutral-cure silicone. The standard acetoxy stuff can react with some finishes if they aren't 100% cured, leading to clouding. Also, did you leave a small expansion gap at the tub rim? I usually run a color-matched bead of caulk there to prevent water from wicking into the top of the panels when people are splashing around.