The 30-Second Verdict
James Hardie HardiePlank (fiber cement) is the premium choice for Florida — particularly coastal and hurricane-zone homes. It's inorganic at its core (no wood fiber at the surface), resists moisture and salt air excellently, and carries Miami-Dade NOA approval. LP SmartSide (engineered wood) is 15–25% less expensive and performs well inland but is less ideal for coastal Florida or areas with extreme humidity. For Florida, James Hardie is worth the premium in most cases.
Head-to-Head Breakdown
James Hardie HardiePlank
Pros
- Fiber cement — inorganic core, no wood rot risk
- HZ5 product line specifically for humid/coastal climates
- Miami-Dade NOA approval for HVHZ
- 30-year warranty
- Factory-primed or ColorPlus pre-finished options
Cons
- More expensive than LP SmartSide
- Heavier — requires more care in installation
- Less forgiving of improper flashing
LP SmartSide
Pros
- 15–25% less expensive than James Hardie
- Lighter and easier to install
- Treated engineered wood — good rot/insect resistance
- 25-year limited warranty
Cons
- Contains wood fiber — more susceptible to moisture than fiber cement
- Less ideal for coastal FL (within 1 mile of salt water)
- No HVHZ approval in Miami-Dade zone
- May require more painting maintenance than HardiePlank
Side-by-Side Comparison
| James Hardie HardiePlank | LP SmartSide | |
|---|---|---|
| Material | Fiber cement (no wood at core) | Engineered wood with treatment |
| Miami-Dade NOA (HVHZ) | Yes | No |
| Coastal FL Suitability | Excellent | Moderate (inland preferred) |
| Installed Cost (FL) | $8–$14/sq ft | $6–$12/sq ft |
| Warranty | 30 years | 25 years |
| Paint Required | Every 15 years (ColorPlus pre-finished) | Every 10 years |
| Best FL Application | Coastal, HVHZ, premium homes | Inland Florida, cost-conscious projects |
Frequently Asked Questions
Is fiber cement siding good for Florida?
Yes — fiber cement siding is excellent for Florida, and James Hardie's HZ5 product line is specifically engineered for humid, coastal southeastern climates. It resists rot, insects, moisture, and salt air better than wood or vinyl. For homes in coastal areas, HVHZ counties, or where maximum durability is the priority, fiber cement is the top choice.
Does James Hardie siding increase home value in Florida?
Fiber cement siding has one of the highest cost-recovery rates in home improvement — approximately 75–85% cost recovery at resale according to industry studies. In Florida's real estate market, exterior cladding condition and durability are significant factors in appraisal and buyer perception, particularly for coastal and higher-value properties.
Can vinyl siding withstand Florida hurricanes?
Standard vinyl siding is vulnerable to Florida hurricanes — it can peel off at sustained winds 75+ mph and become dangerous projectiles. Impact-resistant vinyl (minimum .046" thickness) performs better and may meet code in non-HVHZ areas. In Miami-Dade and Broward (HVHZ), siding must have specific NOA approval or be covered by structural sheathing that meets impact requirements.