I'm in the middle of a bathroom remodel and our contractor just bought a custom cabinet unit. I'm a bit worried because the door panels are made from MDF, and I've heard that using MDF in a humid environment like a bathroom can lead to issues over time. The main structure seems to be plywood, but I need to know if the MDF is something to stress about. They will be painted, but can I expect them to warp in the long run? I'm also curious if MDF door panels will feel cheap or lightweight compared to solid wood. The cabinet hasn't been delivered yet, so we can't feel it for ourselves. Should we ask the contractor to remake the doors with plywood or solid wood instead, even if it means spending more? Has anyone had experience with MDF cabinets in their bathroom and can share how they hold up?
6 Answers
If you plan to paint it, then MDF is a solid choice. Just be aware that plywood or solid wood can expand and contract, potentially cracking the paint. Consider this after you've made the paint decision!
If your bathroom is really that damp, I think you're looking at bigger problems. My bathroom gets moist for about half an hour post-shower, thanks to good ventilation!
Fair point! We've got a solid exhaust fan and our HVAC covers the bathroom, so we’re expecting reasonable moisture levels.
Just a heads up, MDF can swell if it gets wet. You've mentioned there's plumbing above it, so keep an eye on that.
I actually didn't mention that this is just a cabinet without plumbing, so we should be good in that regard.
I don't think the MDF will be a problem at all. Most of the cabinet is solid wood, and those panels likely need to be MDF to achieve that design. They're used everywhere, and I've even had MDF on an outside door that's held up fine. Just make sure to use paint and caulk to keep moisture out! This cabinet sounds way better than most of the options at Home Depot, and those typically last for a long time.
Thanks for confirming! We are really pleased with this custom unit and glad we chose that route. Cheers!
It's generally okay to use MDF in the bathroom if it's properly finished and installed. The biggest concern is that MDF can swell and lose its strength when it gets wet, but if the contractor finishes it well and keeps it out of splash zones, you should be just fine. Make sure you have good ventilation in your bathroom to help with moisture!
Thanks for the reassurance! Will a good primer and paint be enough, or should I consider extra sealing products? I'm keen to be informed since I'm overseeing the project.
MDF actually tends to weigh more than plywood and many solid woods of the same size, and it's also more stable in terms of dimension. It should hold up unless it gets wet, so having it sealed and painted properly is key. You shouldn’t face any issues.
Good to know! Makes sense now that you mention it. Thanks!

That's intriguing, I hadn't heard that before. Appreciate the insight!