Fiberglass vs. cast iron tub: what works best for your bathroom
After installing bathtubs across Wake Forest, Rolesville, Youngsville, and Raleigh for years, we get this question constantly: fiberglass or cast iron?
Both are solid options, but they’re built for different homeowners. Below we break down what each material actually delivers, what it costs in the Wake County market, and when we’d recommend one over the other.
Our Recommendation
For most Wake County homeowners renovating a standard bathroom: go with fiberglass if budget is your main concern, cast iron if you want a tub that lasts 50+ years and holds heat through a long soak. We've installed both across hundreds of Wake Forest, Rolesville, and Youngsville bathrooms, and cast iron is what we'd put in our own homes.
If you're unsure which suits your project, call us at (919) 986-6162.
At a Glance
Fiberglass vs. Cast Iron Tub
| Fiberglass | Cast Iron | |
|---|---|---|
| Weight | 70-100 lbs | 300-500 lbs |
| Average cost (installed, Wake County) | $400-$900 | $1,200-$3,500+ |
| Lifespan | 10-15 years | 50-100 years |
| Heat retention | Low | High |
| DIY-friendly | Yes | No (requires floor assessment) |
| Scratch resistance | Low | High |
| Best for | Budget renovations, quick installs | Long-term investment, luxury feel |
| Our verdict | ✓ Budget pick | ✓ Premium pick |
Fiberglass tubs: what to expect from installation to year ten
Pros and Cons Fiberglass Tubs
Fiberglass tubs, with their lightweight nature and affordability, are available in a variety of designs and shapes. They are less durable compared to cast iron tubs.
| Benefits | Drawbacks |
|---|---|
| Lightweight, easy to install | Less durable, can crack or fade |
| Cost-effective | Shows wear over time |
| Various shapes and designs | Not as enduring as cast iron |
Pros and Cons Cast Iron Tubs
Cast iron tubs offer enduring quality and a timeless appearance, representing a significant investment. Excellent for heat retention but they are substantial in weight and need a robust support framework.
| Benefits | Drawbacks |
|---|---|
| Durable, lasts many years | Very heavy, difficult to move |
| Retains heat well | Expensive |
| Classic aesthetic | Requires sturdy floor support |
Your decision between a fiberglass and cast iron tub should consider factors like budget, ease of installation, and longevity of use. Each material provides unique benefits and involves certain trade-offs.
Advantages and Disadvantages of Fiberglass and Cast Iron Tubs
Advantages and Disadvantages Fiberglass Tubs
Fiberglass and cast iron tubs offer different benefits and challenges. Making the right choice depends on your needs, preferences, and budget.
| Advantages | Disadvantages |
|---|---|
| Lightweight | Can scratch and fade over time |
| Easy to install | Less durable than some other materials |
| Cost-effective | May require more maintenance |
Advantages and Disadvantages Cast Iron Tubs
| Advantages | Disadvantages |
|---|---|
| Durable | Heavy, making installation challenging |
| Maintains heat well | More expensive |
| Classic appearance | Requires a strong support base |
FAQs
A fiberglass tub is molded from chopped fiberglass matting with a sprayed gel-coat finish, weighing 70–100 lbs. A cast iron tub is molded iron coated in fired porcelain enamel, weighing 300–500 lbs. Fiberglass runs $400–$900 installed in Wake County; cast iron runs $1,200–$3,500+.
No, this is the most common mix-up we hear. An acrylic tub is a vacuum-formed acrylic sheet with fiberglass backing. A fiberglass tub is gel-coated fiberglass with no acrylic layer. Acrylic holds colour and resists scratching better than fiberglass and costs a little more; both are far lighter than cast iron.
Cast iron for longevity and heat retention; acrylic for weight, cost and installation flexibility. Cast iron lasts 50–100 years and needs a floor assessment. Acrylic lasts 15–30 years and drops into a standard framed opening.
A standard 60-inch cast iron tub weighs 300–500 lbs empty, and roughly 800–900 lbs filled with water and a bather. That’s why we assess floor joists before installing one on a second storey.
On a slab, no. On a second-floor or crawlspace-framed bathroom, we check joist span and spacing first. Standard 2×10 joists at 16″ on-centre usually handle it; older 2×8 framing sometimes needs sistering.
Yes, and it’s the opposite of what most people assume. Porcelain enamel on cast iron tolerates stronger cleaners. Fiberglass and acrylic scratch and dull if you use abrasive powders or solvents, mild soap and a soft cloth only.
Unlock Your Bathroom's Potential with Bailey's Remodeling
When deciding between a fiberglass or cast iron tub, it all comes down to your priorities. If you’re looking for a lightweight, budget-friendly option that’s easy to install, a fiberglass tub is a great choice. However, if you value durability, heat retention, and a classic aesthetic that will last for decades, a cast iron tub is the way to go.
No matter what you decide, Bailey’s Remodeling is here to help you bring your bathroom vision to life. Whether you choose fiberglass or cast iron, we’ll ensure a smooth and professional installation. Contact us today at (919) 986-6162 for a consultation and let’s create your bathroom remodeling project!