LP SmartSide vs Fiber Cement

Updated 2026-08 ยท Willamette Siding

Quick answer

LP SmartSide is engineered wood that is lighter, easier to install, and slightly cheaper, while James Hardie fiber cement is heavier, non combustible, and holds a premium painted wood look. Both far outperform vinyl in the wet valley. SmartSide suits homeowners who want a warm wood grain and a lower cost, while Hardie suits those who want maximum fire and moisture resistance.

Side by side

Both are excellent upgrades over vinyl. Here is how they differ.

FactorLP SmartSideJames Hardie
MaterialEngineered woodFiber cement
CostSlightly lowerSlightly higher
Weight and installLighter, fasterHeavier, more labor
Fire resistanceTreated woodNon combustible
LookWarm wood grainCrisp painted wood
WarrantyStrong (up to 50 year prorated)Strong (30 year)

How they perform in wet shade

Both resist moisture far better than natural wood. SmartSide is treated engineered wood that resists rot and insects, while fiber cement does not absorb water at all and will not burn. On heavily shaded, damp valley walls, fiber cement has a slight edge on moisture and moss, while SmartSide gives a warmer, more natural grain.

How to choose

Choose LP SmartSide if you want a genuine wood grain look, a lighter product, and a slightly lower cost. Choose James Hardie if fire resistance and the lowest possible moisture absorption are your priorities. Either one is a durable, valley appropriate choice that will outlast vinyl.

Frequently asked questions

Is LP SmartSide better than fiber cement?

Neither is strictly better. SmartSide is lighter, warmer looking, and slightly cheaper. Fiber cement is non combustible and absorbs no water. Both beat vinyl for valley homes.

What are the disadvantages of LP SmartSide?

As an engineered wood product it must be sealed and maintained properly, and it is combustible unlike fiber cement. Installed correctly it performs very well in the wet valley.

Is LP SmartSide more expensive than Hardie?

Usually slightly less expensive than James Hardie, though both cost more than vinyl and less than natural cedar.

Which lasts longer, SmartSide or Hardie?

Both last 30 to 50 years with proper upkeep. Fiber cement has a slight edge in the wettest, most shaded conditions.

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