6 min read · Hardie
Both are quality products. The right choice depends on fire exposure, budget, and aesthetics — here is how we advise homeowners.
Fire
Hardie is non-combustible (Class A). LP SmartSide is engineered wood and combustible. In wildfire zones this is often the deciding factor.
Durability and maintenance
Both perform for decades installed correctly; fiber cement generally offers longer low-maintenance life in harsh exposure.
Install and cost
LP is lighter and faster to install and often costs less; Hardie's fire and longevity advantages can justify the difference.
James Hardie vs. LP SmartSide at a glance
| Attribute | James Hardie fiber cement | LP SmartSide engineered wood |
|---|---|---|
| Material | Cement, sand, cellulose | Treated engineered wood strand |
| Combustibility | Non-combustible, Class A | Combustible (a wood product) |
| WUI / Chapter 7A fit | Widely used in wildfire-exposed assemblies | Limited where non-combustible cladding is required |
| Weight & handling | Heavier; more labor-intensive | Lighter; faster to handle and cut |
| Moisture behavior | Does not wick or swell | Treated against rot but still wood-based |
| Finish | Factory ColorPlus option, long finish warranty | Pre-finish/field options; warranty varies |
| Relative installed cost | Typically higher | Typically lower |
| Best fit | Fire-exposed, hot, high-UV California sites | Budget-sensitive, lower-fire, faster installs |
Key takeaways
- Fire exposure usually decides it
- LP is lighter, faster, often cheaper
- Hardie wins on fire and long-term durability
FAQ
Quick Answers
Both last decades when installed well; fiber cement typically edges it in harsh exposure.
Hardie — it is non-combustible. We recommend it for foothill and Tahoe homes.
Sources
Authoritative references
- James Hardie — official product & installation resources
- California Building Code, Chapter 7A (Materials for Wildfire-Exposed Areas)
External links to government, code, and manufacturer sources. Sierra Siding is not affiliated with these organizations; references are provided for verification.