HardiePlank HZ10 Smooth Lap Siding, Iron Gray (8-1/4 in. x 12 ft.)

Durable fiber cement lap siding engineered for HardieZone 10 climates, finished in Iron Gray with a smooth, modern profile. Built to resist fire, pests, moisture, and fading for long-lasting curb appeal and protection.

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Key Features:

• Engineered for HZ10 climates: Performs in intense sun, heat, humidity, and hurricane-force winds
• Durable fiber cement: Noncombustible and resists rot, warping, termites, and woodpecker damage
• ColorPlus Technology finish: Baked-on color resists fading and requires less maintenance
• Smooth modern profile: Clean, contemporary look with 8-1/4 in. board width and 7 in. exposure
• Code compliant: ICC-ES ESR-2290/1844/2273 and Miami-Dade, Florida, Texas approvals listed

Please check the Product Data Sheet Here

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Specifications Table:

Specification	Details
Product Name	Hardie Plank Smooth Lap Siding for HardieZone 10
Brand	James Hardie
Thickness	5/16 in.
Width	8-1/4 in.
Length	12 ft.
Exposure	7 in.
Color/Finish	Iron Gray, ColorPlus Technology
Material	Fiber cement
Style	Smooth lap siding
Unit of Measure	Piece (PC)
Weight per Piece	19.06 lb
Applicable Standards/Approvals	ASTM E84; ASTM C1186 Type A Grade II; ASTM E136; WUI Listed; ICC-ES ESR-2290, ESR-1844, ESR-2273; City of Los Angeles RR 24862; Miami-Dade Approved; HUD MR 1263d; California DSA PA-019; NYC MEA 223-93-M; Florida FL889; Texas TDI EC-23
Climate Zone	HardieZone 10 (HZ10)

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Frequently Asked Questions (FAQ):

Q: What are the board dimensions and exposure?
A: Board size is 5/16 in. thick x 8-1/4 in. wide x 12 ft. long with a 7 in. exposure.

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Q: Is this product prefinished?
A: Yes, it features James Hardie ColorPlus Technology in Iron Gray for long-lasting color.

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Q: Can it be used in high-wind or coastal regions?
A: Yes, it’s engineered for HZ10 climates and carries approvals such as Miami-Dade and Texas Department of Insurance.

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Q: Is the siding fire resistant?
A: The fiber cement is noncombustible and meets ASTM E84 and E136 standards.

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Q: What installation resources are available?
A: Refer to the official installation instructions and best practice guides linked in the product resources.

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Sculpted Simplicity for Modern Exteriors

Iron Gray in a smooth lap finish delivers a tailored, architectural silhouette that instantly elevates a façade. The ultra-clean lines read crisp and intentional, allowing windows and metal accents to shine. Pair with cedar soffits and matte black hardware for a refined, coastal-modern statement. It’s a timeless, resilient cladding that anchors luxury curb appeal with confidence.

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Upgrade your exterior with durable, fade-resistant HardiePlank Smooth in Iron Gray—built for HZ10 performance and lasting style.

Warranty

Installation