LP SmartSide vs James Hardie: Which Engineered Siding Is Best for Vancouver, WA Homes?

LP SmartSide vs James Hardie: Quick Take for Vancouver, WA

Both LP SmartSide and James Hardie are excellent upgrades over vinyl or natural wood for Clark County homes. They just excel in different areas:

LP SmartSide: Lower installed cost, lighter weight, better impact resistance, and slightly higher R-value.
James Hardie: Longer lifespan, non-combustible, climate-specific HZ5 engineering for the Pacific Northwest, and a straightforward 30-year non-prorated warranty.

For Vancouver’s 42 inches of annual rain, either can work very well when installed correctly. Your budget, how long you plan to stay in the home, and your priorities around fire resistance and impact durability should drive the decision.

What Is LP SmartSide Siding?

LP SmartSide is an engineered wood siding made from wood strands bonded with wax, resin, and zinc borate. The zinc borate treatment helps resist fungal decay and termites, which are common failure points for traditional wood in wet climates.

At about 1.5 pounds per square foot and 0.354 inches thick, LP SmartSide is one of the lightest engineered siding products on the market. That low weight reduces structural load and makes it easier to handle on site, especially on older Pacific Northwest homes.

How LP SmartSide Is Made

Wood strands are treated with zinc borate.
Strands are blended with wax and resin binders.
The mix is pressed under high heat and pressure into boards or panels.

This process removes natural weak points found in solid wood, such as knots and inconsistent grain. You get a wood-grain appearance with fewer vulnerabilities to rot and warping than cedar or pine.

Key Characteristics of LP SmartSide

Profiles: Lap siding, panel siding, shakes, and trim.
Finish options: Primed for field painting or pre-finished products.
Impact resistance: Engineered wood flexes rather than shatters, making it more forgiving against everyday impacts.
Hail coverage: Warranty coverage for hail up to 1.75 inches in diameter.

For Vancouver, the most important feature is the zinc borate treatment and moisture-resistant binders, which help the product stand up to long, wet winters when paired with good installation practices.

LP SmartSide weighs about 1.5 PSF at 0.354 inches thick, making it 53–67% lighter than James Hardie fiber cement. That difference translates into easier handling, less crew fatigue, and often lower labor costs on Clark County re-siding projects.

What Is James Hardie Fiber Cement Siding?

James Hardie dominates the fiber cement siding category. Its boards are made from Portland cement, sand, cellulose fibers, and water. The cement-and-sand base makes the product non-combustible and highly resistant to rot, insects, and warping.

James Hardie siding is rated to withstand winds up to 130 mph, far beyond what Vancouver typically sees, but reassuring for storm resilience.

How James Hardie Is Made

Portland cement and silica sand are mixed with cellulose fibers.
The slurry is formed into boards or panels.
Boards are autoclaved (cured under steam and pressure) for strength and dimensional stability.

The result is a dense, rigid siding that doesn’t swell, rot, or attract insects. That density is also why Hardie weighs about 2.3–2.5 PSF, significantly heavier than LP SmartSide.

James Hardie’s HZ5 Climate Zone System

James Hardie uses its HardiZone (HZ) system to tailor products to specific climates. Vancouver, WA and the broader Pacific Northwest fall into the HZ5 zone, designed for cool, wet conditions.

HZ5 boards feature:

Reduced water absorption.
Integrated drip edges to shed water away from the wall.
Formulations tuned for freeze-thaw cycles and persistent moisture.

For a city that averages 42 inches of rain per year (with 7.4 inches in December alone), HZ5’s moisture management is a strong fit.

HZ5 fiber cement is engineered specifically for wet, cool climates like Vancouver, WA, combining reduced water absorption with built-in drip edges to help protect wall assemblies from prolonged moisture exposure.

Cost Comparison: LP SmartSide vs James Hardie

Installed Cost

Based on 2025 estimates from SidingCost.org:

LP SmartSide: $9.50–$16.50 per sq ft installed
James Hardie: $10.50–$17.50 per sq ft installed

Both deliver strong resale value. Nationally, siding replacement recoups about 75.6% of its cost at resale.

Frequently Asked Questions

Is LP SmartSide cheaper than James Hardie in Vancouver, WA?

Yes. LP SmartSide typically costs $9.50–$16.50 per square foot installed, while James Hardie runs about $10.50–$17.50 per square foot installed in 2025 estimates. The main savings with LP SmartSide come from lower labor costs because it’s 53–67% lighter than fiber cement, which makes installation faster and less demanding on crews.

Which siding lasts longer, LP SmartSide or James Hardie?

James Hardie generally lasts longer. Fiber cement siding has an expected lifespan of 50–100 years with proper maintenance, while LP SmartSide engineered wood typically lasts 25–50 years. Both products require repainting about every 10–15 years to maintain protection and appearance.

Can LP SmartSide handle Vancouver’s rainy climate?

LP SmartSide can perform well in Vancouver’s 42 inches of annual rainfall when it’s installed correctly. Its engineered wood is treated with zinc borate to resist fungal decay, and the wax-and-resin binders help shed moisture. Proper flashing, housewrap, clearances, and timely repainting are critical for long-term performance in the Pacific Northwest.

Is James Hardie siding fireproof?

James Hardie fiber cement siding is non-combustible and carries ASTM fire ratings. It will not ignite, contribute fuel, or spread flames, which makes it a strong choice for homes near wildland areas or where insurance companies reward non-combustible exteriors. LP SmartSide is not Class A on its own but can be part of a 1-hour fire-rated wall when installed over 5/8-inch Type-X gypsum sheathing.

Which siding has the better warranty, LP SmartSide or James Hardie?

James Hardie offers a 30-year non-prorated substrate warranty plus a 15-year ColorPlus finish warranty, which provides full coverage on the boards for three decades. LP SmartSide offers a 5/50 warranty: 5 years of 100% labor and material coverage followed by 50 years of prorated substrate coverage. Hardie’s warranty is simpler and often more valuable in years 15–30, while LP’s early 5-year full coverage and added hail protection are advantages for some homeowners.