Acrylic Bathtub vs Cast Iron Bathtub
Part of our Bathtubs guides.
Quick verdict: acrylic for most homes and upper floors; cast iron if you want maximum heat retention and the floor can take it.
Side-by-side
| Acrylic Bathtub | Cast Iron Bathtub | |
|---|---|---|
| Weight (empty) | Light, often under 100 lb | Very heavy, often 300+ lb |
| Heat retention | Good, warm to touch | Excellent once warmed |
| Durability | Scratches can be buffed | Enamel can chip |
| Floor load | Easy on upper floors | May need reinforcement |
| Price | Lower | Higher |
Why most freestanding tubs are acrylic
Acrylic keeps shipping, installation and floor-load issues manageable, which is why budget and mid-range freestanding tubs, including VEVOR's, use it. Cast iron makes sense in a historic restoration or on a slab floor.
Weight and your floor
An empty acrylic freestanding tub often weighs under 100-120 lb; a cast iron clawfoot can weigh 300-500 lb before water. Add 50-70 gallons of water at about 8.3 lb per gallon and a person, and a filled cast iron tub can exceed 1,000 lb concentrated on four feet. On slab foundations this is fine. On upper floors of older wood-framed homes, a contractor or engineer should confirm the joists can carry it. Acrylic rarely triggers that question.
Heat retention in real use
Cast iron takes a while to warm up, because the heavy metal absorbs heat from the first water you run. Once warm, it holds temperature well. Acrylic feels warm to the touch immediately and insulates reasonably well, especially double-wall designs. For a typical 30-45 minute soak, the difference is smaller than many people expect; topping up with hot water works for both.
Durability, repairs and cleaning
- Acrylic: can scratch, but light scratches can be buffed out with acrylic polishing kits. Avoid abrasive cleaners and solvents.
- Cast iron: the porcelain enamel is very hard, but a dropped bottle can chip it, exposing iron that may rust. Chips can be touched up but rarely look perfect.
Cost beyond the tub
Cast iron's weight raises shipping and delivery costs, and you may need extra help to carry it in. Acrylic tubs like VEVOR's 67-inch models ship with the drain and overflow included, keeping the total project cost lower.
Bottom line
For most homes, especially upper-floor bathrooms and DIY installs, acrylic is the practical choice. Pick cast iron if you're restoring a period bathroom, the floor can take it, and you value heat retention and a heavy, solid feel above everything else.
Frequently asked questions
Does acrylic feel cheap?
Quality acrylic reinforced with fiberglass feels solid; thin unreinforced shells can flex.
Which is more comfortable?
Acrylic feels warmer immediately; cast iron holds heat longer once warm.
Can cast iron tubs be refinished?
Yes, enamel can be professionally refinished.
Do acrylic tubs crack?
They can if unsupported or overloaded; proper installation prevents this.
Which is better for resale?
Both are acceptable; condition matters more than material.