Once a family has settled on a shower chair or transfer bench over other bathing options, a second decision gets skipped more often than it should: what the seat is actually made of. Teak wood, molded plastic, and aluminum-and-polyethylene frames all show up in the same "shower seating" search results, but they age very differently in a room that is wet every single day. For a safe-bathroom remodel meant to last through several stages of a person's recovery or aging-in-place journey, the material is worth as much attention as the size or weight rating.
Mold and Mildew Resistance: Teak, Plastic, and Aluminum Compared
Teak has a real advantage here: its naturally high oil content repels water and gives it built-in resistance to mold and mildew that most other woods do not have. That resistance is not immunity, though. In the warm, humid environment of a daily-use shower, teak can still develop mold or mildew if soap scum is allowed to build up, since the residue traps moisture and becomes a food source for mildew even on an oily wood surface.
Plastic shower chairs are generally moisture-resistant by nature, but plastic is not self-cleaning. Left unrinsed, a plastic seat becomes just as much of a breeding ground for mold, mildew, and bacteria as any other surface in the shower. Some manufacturers address this directly by treating plastic components with an antimicrobial finish designed to resist bacteria and mildew buildup between cleanings, which is worth checking for on the product spec sheet. Aluminum-framed chairs, typically paired with a polyethylene seat, are rust-resistant at the frame level, but the plastic seat portion can develop mold under the same neglect conditions as a standalone plastic chair.
The practical takeaway: no material is maintenance-free in a shower. Teak starts with a slight head start on mildew resistance; every material depends on the same habit — rinse after use, dry it out, and clean it on a schedule — to actually stay mold-free over the years a remodel is supposed to last.
Weight Capacity: The Numbers Vary More Than the Marketing Suggests
Weight capacity is often assumed to track with material, but the range within each category is wide enough that a name alone ("teak," "aluminum") is not a reliable proxy for how much a seat can hold.
- Teak: Many standard teak benches carry a roughly 300-pound rating, with heavy-duty models rated as high as 500 pounds and some premium designs landing around 440 pounds.
- Plastic: Standard plastic shower chairs typically fall in a 250-to-400-pound range, with some bariatric-specific plastic models rated to about 350 pounds.
- Aluminum: Aluminum-framed chairs commonly start around a 300-pound rating, but bariatric and heavy-duty aluminum designs vary widely — models are sold at 330, 350, 385, 450, and even up to 500 or 700 pounds.
Because the spread inside each material category is this wide, the weight-capacity number stamped on the individual product listing matters more than which material the seat is made from. A remodel that needs to accommodate a heavier user, or accommodate a user whose needs may change, should treat the rated capacity as a hard filter before material preference enters the decision at all.
Maintenance: What Each Material Actually Asks Of You
Teak is often marketed as low-maintenance, and relative to refinishing furniture-grade wood elsewhere in a home, it is. In a shower, the routine is simple: rinse the bench after each use, and clean it periodically with a mild detergent-and-water solution and a soft brush to prevent soap scum from settling in. A vinegar solution can lift stubborn mildew stains. Teak oil is optional and cosmetic — it restores the wood's original golden tone, but teak left untreated will simply weather to a silver-gray patina without any loss of durability or structural integrity.
Plastic and aluminum seating both need the same rinse-after-use habit, plus a weekly deep clean with a mild detergent or bathroom cleaner, paying particular attention to crevices and drainage holes where moisture collects. Harsh chemicals like bleach are generally worth avoiding on these materials unless the manufacturer specifically approves them, since bleach can degrade plastic components or corrode metal hardware over time. A diluted white vinegar solution is a safer, still-effective option for routine cleaning and disinfecting. Regardless of material, it is worth periodically inspecting for loose hardware, hairline cracks, or a frame that has started to flex — and checking the rubber feet or suction cups, since their grip can degrade with repeated exposure to oil-based soaps, quietly turning a stable seat into an unstable one.
Cost Ranges and What Drives Them
Teak sits at the higher end of the price spectrum, generally landing in the $100 to $500 range for freestanding benches and stools, with permanently wall-mounted teak benches often running $400 to $700 given the added hardware and installation. Plastic shower seats are the most budget-flexible option, with many standard chairs available for well under $100, though the category stretches up toward $800 for specialized or bariatric-rated models. Aluminum-framed chairs span a similarly wide range, from roughly $25 to $30 for a basic model up to several hundred dollars for a bariatric or heavy-duty design. In each material category, the price is driven far more by weight rating, adjustability, and bariatric hardware than by the base material itself.
Material and ADA Considerations for a Remodel
For any shower seat that will be permanently installed rather than portable, ADA guidance recommends a mounted seat height of 17 to 19 inches off the floor — a detail worth confirming with whoever handles the installation, since it affects usability regardless of material. Both teak and solid-surface phenolic seating are manufactured in ADA-compliant configurations when installed to that specification. Whatever material is chosen, the safety features that actually prevent a fall matter more than the material label: non-slip rubber feet or suction-cup bases for stability on a wet floor, drainage holes in the seat itself to keep water from pooling, and height adjustability so the seat pairs correctly with the rest of the bathroom's layout.
Choosing the Right Material for Your Remodel
There is no universally "correct" material here — there is a correct material for the household's priorities. A family prioritizing a longer-lasting, naturally water-resistant seat that will look intentional as part of a full bathroom remodel often leans toward teak, accepting the higher upfront cost and the fact that its weight ratings and finish still depend on regular cleaning, not the wood alone. A family that needs a lightweight, easily replaced, budget-friendly seat — or one that needs a specific bariatric weight rating above what most teak models offer — is often better served by a plastic or aluminum-framed chair with an antimicrobial-treated seat. Either way, the seat is only one piece of a bathroom that is being paired with a broader safety remodel, and the material decision should be made alongside grab bar placement, flooring, and the seat's weight rating rather than in isolation.