"All plywood construction" is one of the most common claims on bathroom vanities. Often it's true – for the cabinet box. The doors are a different story. A lot of painted shaker vanities pair a plywood box with doors that have an MDF centre panel. It looks perfect in the showroom. The problems show up a year or two later, and customers who've lived with these vanities have pointed it out to us more than once.
How a shaker door is built
A shaker door is a frame – two vertical stiles and two horizontal rails – with a flat centre panel sitting in a groove. On many vanities the frame is solid wood or MDF, and the centre panel is a thin sheet of MDF. Then the whole door is painted, and the paint is the only thing keeping water out of the MDF.
What happens over time
- The paint wears at the joint. The inside corner where the centre panel meets the frame is the weakest point in the paint. The frame and panel move slightly differently with humidity, and every time the door is opened, wiped or bumped, that seam gets stressed. A hairline crack forms, usually along the bottom rail first.
- Water finds the crack. In a bathroom there's always water: splashes from the sink, drips when you wipe the counter, steam from the shower, wet hands on the handle. It runs down the door and sits in the groove along the bottom rail – right on that crack.
- The MDF soaks it up and swells. MDF acts like a sponge once its surface is breached. The panel edge swells, the paint lifts and bubbles, and you get a raised, fuzzy edge along the bottom of the panel.
- It can't really be fixed. Swollen MDF doesn't shrink back. You can sand and repaint, but the damage tends to come back, and the usual fix is a new door – which for a discontinued vanity often means a mismatched door or a new vanity.
The cabinet box can be in perfect shape while the doors look tired, which is why it catches people off guard. They paid for plywood and assumed the whole vanity was built that way.
How to check a shaker door before you buy
- Ask directly: "What is the centre panel made of?" If the answer is MDF, or the seller isn't sure, assume MDF.
- Check the spec sheet for words like "MDF panel", "MDF door" or "engineered wood door" – sometimes listed separately from the cabinet box.
- Look at the back of the door. A smooth, featureless back with no grain often means MDF.
- Look at the bottom inside corner of a display model that's been around for a while. Any cracking along the panel seam is a preview.
How we build our doors
Our doors and drawer fronts use a plywood core with a real wood veneer face – including our painted Breeze shaker vanities – mounted on solid wood face frames and 3/4″ birch plywood boxes. Like any painted finish, paint can show wear at a seam after years of use, but plywood doesn't swell and fall apart the way MDF does when a little water gets in.
Help any vanity last longer
- Wipe drips off the doors, especially the bottom rail, instead of letting them dry there.
- Run the bathroom fan during and for 20 minutes after a shower.
- Fix leaks under the sink right away.
- Use a soft, damp cloth – no abrasive cleaners on painted finishes.
Want to see the difference in person? Come by the Richmond showroom and look inside our doors and drawers. Browse our real wood vanities or read plywood vs MDF vs particle board.
Not sure? Ask before you buy. Text a photo of your space with your measurements to 778-994-4994 and we'll tell you which size fits, usually the same day. Or see the vanities in person at our Richmond showroom – Saturdays 11–4, weekdays by appointment.