Hardie plank siding is fiber cement lap siding — the flagship product from James Hardie and the most widely installed fiber cement lap in the United States. Homeowners use “HardiePlank” and “Hardie siding” interchangeably, and that is fair, because the lap board is what most people actually mean. This guide stays on HardiePlank itself: the profiles, the factory finishes, real installed costs, and the installation details that decide whether the warranty is worth anything.
Short version: HardiePlank is the default premium choice for most US homes. It holds paint far longer than wood, resists rot and insects, and comes in factory colors that need no repainting for a decade or more. It also costs meaningfully more than vinyl, it is brittle under impact, and in hail country you should think twice.
Here is what you get, what you pay, and how it goes on the wall. Still comparing categories? See the home siding guide.
What HardiePlank Actually Is
Fiber cement is portland cement, ground sand, cellulose fiber, and water, formed into boards and cured. The material is the same across brands — see the fiber cement siding guide for that side of it. HardiePlank is the horizontal lap version, and James Hardie also sells vertical panels and shake-style boards, which are separate lines — the Hardie siding brand overview covers the whole catalog.
HardiePlank is dimensionally stable, so it does not swell and cup the way wood does. It is non-combustible, and it shrugs off the freeze-thaw cycles that wreck wood and some composite boards. It installs like wood lap: nailed through a nailing hem, lapped, and finished with trim. Common lengths are 12 feet, with some profiles in 16 feet.
Profiles, Textures, and Plank Widths
Three textures cover most orders. Select Cedarmill is the wood-grain default — a soft horizontal grain that reads like painted cedar. Smooth is flat-faced and popular on contemporary and modern-farmhouse homes. Beaded Cedarmill adds a bead line along the bottom edge for a cottage look. The newer Statement Collection adds deeper, more pronounced grain options for buyers who want more texture.
Widths are 5.25, 6.25, 7.25, 8.25, and 12 inches. Roughly 1.25 inches of each board laps under the course above, so a 6.25-inch plank shows about 5 inches of face. Narrow planks give more shadow lines and a traditional look; wide planks give fewer lines and a flatter, more modern face. Width also changes labor: more courses means more cuts and more nails.
ColorPlus vs. Primed-Only
ColorPlus is the factory finish: an acrylic coating applied and cured at the plant, backed by a 15-year finish warranty, in a curated palette that Hardie refreshes with a color-of-the-year push. Primed-only planks arrive with a primer coat and get topcoated in the field.
ColorPlus costs more upfront, often $1–$2 per square foot. It earns that back twice. First on repaint interval: factory-finished planks typically hold color 10–15 years, while field-painted fiber cement wants attention in 7–10. Second on touch-up: ColorPlus has a matching touch-up product, so a scratch or a nail head disappears. On a field-painted job you are matching a custom color by eye a year later. Choose primed-only only when you need a color outside the palette. Otherwise buy the factory finish.
HardiePlank Siding Costs and Why Bids Vary
Material runs about $1.50–$3.50 per square foot. Installed, most US markets land between $6 and $12 per square foot, with high-cost metros and steep, cut-up elevations reaching $14 or more. A typical home carries 1,500–2,500 sq ft of exterior wall, putting a full replacement in the $10,000–$28,000 range before trim.
Trim, soffit, and fascia are separate line items. Trim boards commonly run $2–$6 per linear foot installed; soffit and fascia replacement $8–$20 per linear foot. Removing and disposing of old siding adds roughly $1–$3 per square foot. Bids vary because scope varies — scaffolding, second-story access, window count, and whether the old siding and the weather barrier come off all move the number.
| Siding | Installed / sq ft | Service life | Repaint interval | Maintenance |
|---|---|---|---|---|
| Vinyl | $4–$7 | 20–30 years | None | Wash |
| HardiePlank ColorPlus | $6–$12 | 30+ years | 10–15 years | Wash |
| LP SmartSide | $6–$10 | 25–30 years | 8–12 years | Wash, touch up |
| Cedar | $10–$18 | 30+ years with care | 5–8 years | Stain, seal |
Field note: The red flags in a Hardie bid are scope gaps, not price. No weather barrier, no kick-out flashing at roof-to-wall intersections, and siding run down into the mulch are the three we see most. Any of them will cost you more later than the cheapest bid saves you now.
How HardiePlank Is Installed
Trim goes on first. Corners, window and door trim, and the starter strip are set before the field planks, so every plank dies into trim instead of butting against it in the open.
Planks then go up with blind nailing — nails driven through the nailing hem at the top of each board, with the head left just proud of the surface. An over-driven nail cracks the plank and pins it so it cannot move with the wall. Face nails are allowed only in narrow rips and gable cuts, and those get filled and touched up. Use hot-dip galvanized or stainless fasteners, and stainless in coastal salt zones.
Behind the planks you need a weather-resistive barrier (WRB): house wrap or felt over the sheathing. Fiber cement is not waterproof, and water that gets behind the lap needs a path out. In wet climates a furred rain screen drains better. Flashing is where failures start — kick-out flashing at roof-to-wall intersections, head flashing over windows and doors, pan flashing under them.
Clearance is non-negotiable. Leave at least 1 inch between the bottom edge of the siding and grade, and the same kind of gap where siding meets a roof surface or a deck ledger. Bury the bottom course in mulch and it wicks water. Leave about a 1/8-inch gap at butt joints and where planks meet trim, seal with paintable caulk, and touch up cut edges.
Maintenance and the Honest Downsides
With ColorPlus, maintenance is a hose, mild detergent, and a soft brush once a year. No scraping, and no repainting on a ladder for a decade or more.
The downsides are real. HardiePlank is brittle — a ladder, a baseball, or large hail can chip or crack it, and the damage shows. It is heavy, so crews move slower and labor costs more. Cutting it creates silica dust, so installers should use a wet saw or a respirator. Cut edges chip easily and need touch-up. And it costs roughly 1.5 to 2 times what vinyl does. In the hail belt — Texas, Oklahoma, Kansas, Colorado — weigh impact resistance honestly; some homeowners there are better served by another product.
Frequently Asked Questions
Is HardiePlank the same as Hardie siding?
“Hardie siding” is the catch-all homeowners use for the James Hardie brand; HardiePlank is the horizontal lap product specifically. James Hardie also makes vertical panels and shake-style boards. If a bid just says “Hardie siding,” ask which product line, which texture, and which plank width — those choices change both the look and the price.
How much does HardiePlank cost per square foot installed?
Typical US range is $6–$12 per square foot installed with ColorPlus, or roughly $10,000–$28,000 for a full house. Material alone runs $1.50–$3.50 per square foot. Trim, soffit, and old-siding removal are extra, and steep or cut-up elevations push you to the top of the range.
Does HardiePlank need to be painted?
ColorPlus planks do not need paint for 10–15 years — the factory finish is the finish. Primed-only planks must be topcoated. Even with ColorPlus, plan on washing once a year and touching up chips with matching paint so moisture cannot get into an exposed edge.
How long does HardiePlank last?
The product carries a 30-year warranty and, on a properly flashed wall, commonly lasts that long. The finish is warrantied for 15 years. Real-world life depends less on the board than on what is behind it: the WRB, the flashing, and the clearance above grade.
Can HardiePlank be installed over existing siding?
Sometimes. Some installers will go over one layer of well-attached siding with a new WRB, but you lose depth at windows and doors and may hide rot. If the old siding is wood or shows any softness, removing it is the safer call.
The Bottom Line
HardiePlank is the default premium choice for most US homes, and it earns the spot. It holds finish far longer than wood or vinyl, resists rot, insects, and freeze-thaw, and ColorPlus buys you a decade without a paintbrush. Expect $6–$12 per square foot installed, or $10,000–$28,000 for a typical house. It is not the cheapest option, and in serious hail country price impact resistance honestly before you commit. Hire a James Hardie-approved installer, get three local bids, and read the flashing and clearance details in each — those details decide how long the siding lasts.
About the author
Marcus Hale writes about exterior remodeling and building products for SidingHolic. He researches siding, trim, and gutter systems using manufacturer specifications, contractor pricing in US markets, and residential building-code requirements, then translates the trade-offs into plain language for homeowners. Read more about our editorial approach.