James Hardie 5/16 in. x 7-1/4 in. x 12 ft. HardiePlank Smooth Lap Siding, HZ10 – Aged Pewter

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HardiePlank Smooth Lap Siding, 7-1/4 in. x 12 ft., HZ10

Engineered for Climate HZ10 regions, this James Hardie fiber cement plank delivers the clean look of smooth lap siding with exceptional durability. Pre-primed for paint, it resists moisture, pests, and fire for long-lasting curb appeal in hot, humid, and coastal environments.


Key Features:

  • Engineered for Climate (HZ10): Formulated to withstand heat, humidity, moisture, sun, and storm conditions.
  • Durable Fiber Cement: Resists rot, warping, cracking, and damage from pests like termites and woodpeckers.
  • Smooth, Paint-Ready Surface: Factory primed for superior paint adhesion; finish in your preferred exterior color.
  • Noncombustible Safety: Complies with ASTM E136 and resists flame spread.
  • Classic Lap Profile: 7-1/4 in. width x 12 ft. length provides approximately 7.25 sq. ft. of coverage per board.

Specifications Table:

Specification Details
Material Fiber cement
Finish Primed (paint-ready)
Color/Finish Family Primed/White hue primer
Profile Clapboard (lap siding) smooth
Thickness 5/16 in. (0.312 in.)
Width 7-1/4 in. (7.25 in.)
Length 144 in. (12 ft.)
Coverage Area per Board Approximately 7.25 sq ft
Orientation Horizontal
Siding Features Pre-primed, ready to paint, water resistant
Fire Rating Noncombustible; complies with ASTM E136
Warranty 30-year limited non-prorated, transferable siding substrate warranty
Engineered For HardieZone 10 (HZ10) climates: high heat, humidity, moisture, sun, storms

Frequently Asked Questions (FAQ):

Q: Is this board prefinished or primed?
A: It is factory primed with a yellow-hue primer and is ready to paint with an exterior acrylic within 180 days of installation.


Q: What climate is this siding designed for?
A: This is HZ10 siding, engineered for hot, humid, and coastal climates with strong sun and storm exposure.


Q: How much coverage does one board provide?
A: Approximately 7.25 square feet per board (exposed coverage depends on installation).


Q: What is the warranty?
A: 30-year limited, non-prorated, transferable substrate warranty for HardiePlank.


Q: Is the material noncombustible?
A: Yes, fiber cement complies with ASTM E136 as a noncombustible cladding.


Sleek Coastal-Ready Siding with Architectural Calm

The smooth HardiePlank face drapes a facade in a refined, tailored line that reads modern yet timeless. Its crisp profile creates a rhythm of shadow and light, letting windows and trim sing. Paint it a moody pewter or a luminous white for a polished, gallery-like exterior, then layer dark metal accents for contrast. It’s an essential foundation for a luxurious, low-maintenance envelope.


Choose HardiePlank Smooth HZ10 to achieve a refined, paint-ready exterior that stands up beautifully to demanding climates.

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