I’ve got a 1920s bathroom, and the grout’s always been a battle. I reseal every year, maybe year and a half, but I’m probably more paranoid than most after dealing with some nasty mildew behind the tiles once. Two years might be fine if your bathroom’s well-ventilated, but I’d keep an eye out for any spots that start looking darker or feel damp. It’s wild how much easier cleaning is once you stay on top of it.
I totally get the paranoia about mildew—my last place had a tile shower that looked fine on the surface, but when I started demoing, there was this nasty black stuff hiding under the grout. Honestly, I probably reseal more than I need to now just from that experience. Still figuring out if it’s overkill, but after seeing what can grow behind the scenes, I’d rather be safe than sorry. Ventilation helps, but sometimes old bathrooms just have a mind of their own...
Ventilation helps, but sometimes old bathrooms just have a mind of their own...
You’re not wrong about that—some of these old bathrooms are just stubborn. I’ve demoed showers that looked fine on the outside, only to find rot and mold behind the cement board. Over-sealing isn’t really a thing in my book; if you’ve seen what water can do over time, you know it’s better to be cautious. One thing I’d add: check your caulk lines every few months. Even a tiny gap is enough for moisture to sneak in and start trouble. Also, if you’ve got an exhaust fan, run it longer than you think you need—moisture lingers way after a shower’s done.
Definitely agree on the caulk lines—I've learned that lesson the hard way. One of my rental units had what looked like a tiny crack in the corner of the shower, barely noticeable. Figured it was no big deal... until a tenant called about a musty smell, and I ended up tearing out half the wall. Turns out, water had been sneaking in for who knows how long. Now I keep a tube of silicone in my toolbox and just touch up any suspect spots during inspections.
The exhaust fan thing is underrated too. I used to think running it for five minutes after a shower was enough, but moisture really lingers. Now I tell tenants to leave it on for at least 20 minutes, or even better, put it on a timer switch. Not everyone listens, but it’s saved me a lot of headaches.
It’s wild how much damage a little water can do if you’re not on top of it. Old bathrooms definitely have their quirks... sometimes I think they’re just waiting for you to let your guard down.
Keeping mold away from your shower—my favorite lazy hack
I hear you on the caulk lines. It’s wild how a tiny gap can turn into a full-blown disaster behind the wall. I used to think “out of sight, out of mind” with those little cracks, but yeah... learned that lesson when I found mushrooms growing behind some old tile. Not the fun kind either.
On exhaust fans, I’m with you—those things are life savers, but honestly, I think most people underestimate just how much moisture hangs around. I swapped mine for a humidity-sensing fan and it’s been a game changer. No more relying on tenants (or my own forgetfulness) to flip a switch. It just kicks on when it needs to.
One thing I’ll add: eco-friendly cleaning sprays with vinegar or tea tree oil. Quick spritz after a shower, and mold doesn’t stand a chance. Plus, no harsh chemicals. It’s not foolproof, but it keeps things under control between deep cleans.
Bathrooms really are sneaky... feels like they’re plotting against you if you let your guard down for even a week.