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The Daily Insight

What is Hardie wood siding

Author

Mia Morrison

Published Mar 19, 2026

What Is Hardie Board Siding? Hardie Board siding is a super durable siding product that looks amazing, is long-lasting, and comes with a fabulous warranty. It’s made of cement, sand, and cellulose fibers which combine to create an outstanding material to both protect and beautify homes.

Is Hardie board better than wood?

Hardie® siding is available in a texture that has the classic, natural appearance of cedar, while providing you with more benefits. Unlike wood, James Hardie fiber cement is specifically formulated to better resist the damaging effects of sun, moisture, extreme temperatures, pests, and fire.

Why is Hardie board so expensive?

High Installation and Labor Costs: Hardie board siding requires more planning, a larger labor force, and takes longer to install due to its composition. It weighs about 300 pounds (100 square feet) compared to 60-70 pounds for vinyl siding. This can increase labor and the cost of cement installation.

What is Hardie siding made of?

What Is Hardie Board Siding. Hardie Board remains the number one siding in America and continues to be the top of the line fiber cement siding. Fiber cement is a composite material comprised of cellulose wood fibers, sand, and water. As such, it is a durable material designed to mimic wood.

Is Hardie board better than vinyl siding?

Both forms of siding have their benefits, but for the most part, James Hardie siding is more durable. While both vinyl and fiber cement are rot resistant and pest resistant, unlike traditional wood planks, Hardie board siding is inflammable, warp resistant, Engineered for Climate®, and impact resistant.

Can you pressure wash HardiPlank?

The manufacturer recommends that you do not pressure wash your Hardie siding. The hard spray of water from the power washer can damage the surface of the siding. In fact, pressure washing fiber cement siding is one of the only ways you can damage this durable type of siding.

Do termites eat Hardie board?

Hardie Board siding resists pests including termites and carpenter ants. It’s also woodpecker resistant, so you don’t have to worry about the hassles of repairing termite or woodpecker damage.

Does Hardie board soak up water?

Hardie siding does a great job of wicking moisture when it is installed on the wall, but when it’s uncovered and flat on the ground it will absorb water. … Luckily, it takes lots of water to saturate Hardie products! It’s no problem for a contractor to install James Hardie products in light rain.

Does Hardie board need waterproofing?

Hardiebacker (James Hardie): the use of a waterproof membrane, vapor barrier or vapor. retarding membrane is optional unless the local building code requires it.

Is Hardie siding expensive?

You can expect it to be more expensive than vinyl siding, but it’s cheaper to use than brick or stucco and about the same price as other composite sidings. On average, Hardie board siding costs $10 per square foot — so, for example, a 1,200-square-foot exterior wall would cost around $12,000 to install.

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Do you paint Hardie board?

Painting Hardie board siding will significantly improve its look and its longevity. Siding finishes generally last for around 15 years, so you need to do it, and do it right. Painting, when done properly can really bring out the wood feel of the Hardie board.

How often should Hardie siding be painted?

Hardie Plank is also called fiber cement siding. While it’s far heavier than aluminum, vinyl or wood, it is extremely durable and typically only needs a new paint every ten to twenty years for maintenance. It is one of the best materials and long-term solutions for protecting your home.

Is Hardie board cheaper than brick?

Material alone, regular Hardi siding runs approximately $1.15/SF where “Artisan” runs $2.40/SF and brick runs anywhere from $2.50-$5.00/SF depending upon the brick you choose. There are six “standard” size brick per SF so this range will allow for an allowance of $0.42 – $0.83 per brick.

Does hardiplank add value to home?

James Hardie siding will not only give your home a whole new look and feel; it will also significantly increase its value, as it has consistently been ranked one of the top projects with the highest return on investment by Remodeler Magazine’s Cost vs. Value report.

Do you need insulation under Hardie siding?

Hardie Plank is a cement board; it’s composition is sand and water. It is heavy on the wall and provides no insulation value. Formed to resemble wood, it fails to provide a deep, rich grain and does not come close to the look of wood. It is highly susceptible to mold and mildew.

How long will HardiPlank last?

The Hardieplank lifespan. As a result, it has the same durability as brick or stone. And just as with a brick or stone home, Hardieplank siding should last for the life of your home. James Hardie offers a 30-year warranty on their product, which shows just how confident they are in the long life of their product.

Can you use jomax on Hardie board?

James Hardie recommends using mildew cleaner like Jomax®, Mildew Check® or Mold Armor®. Mix the mildew cleaner with water as recommended on the mildew cleaner instructions. Strong mildew cleaners are often in concentrate form, so make sure to follow the directions correctly as not to damage your siding or yourself.

Is hardiplank fireproof?

James Hardie Fire Resistance While James Hardie fiber cement is not considered a fireproof product, it is considered to be fire resistant. James Hardie siding products are non combustible and are considered by many building professionals to be a safer alternative than wood or vinyl siding.

What do you cut Hardie board with?

A carbide-tipped scoring knife is recommended, but you can also use a utility knife or shears. Never use a high-speed grinder to cut cement board indoors, since this can create a dust hazard. Here’s how to perform a straight cut on your HardieBacker Cement Board: 1.

Who invented Hardie board?

In the mid 1980s, the siding manufacturing company James Hardie pioneered its development. As the industry leader for decades, James Hardie and Hardie board have pretty much become a synonym for fiber cement siding.

How do you clean mildew off of hardiplank?

Use your soft sponge or cloth and lightly scrub the mold or mildew with the cleanser. Once it’s clean again, use your water hose to thoroughly rinse the area with water. A man power washing a house. Use caution when using a power washer to clean your fiber cement siding from James Hardie.

Do you need plywood behind Hardie board?

Fiber cement siding should be installed over plywood, OSB, or sheathing. Be sure that the siding installed is dry. … Building codes will usually require installing siding over water-resistant barriers and nailed into the studs every 16 or 24 inches.

Can Hardie board be used for fencing?

Cement boards, often referred to as “Hardie Boards” (after a popular manufacturer) have been around for a while as a house siding alternative, made up of 90% sand and cement. We love it on outdoor fences. … Longevity: It wears much longer than a traditional wood fence.

Can you use Hardie board in shower?

Installing cement backerboard is one of the more popular choices for a shower wall substrate. Cement backerboards include Hardiebacker, Durock, Fiberboard, wonderboard, and similar products. … When installed properly they will give you many, many years of durable shower construction.

Does HardiPlank siding crack?

Hardie board siding usually cracks due to poor installation. The original installer might have accidentally installed a nail too close to the edge of the siding, causing a crack. You can easily fix it by cleaning it and then using caulk to patch the gap. … “This can happen again after caulking.

Do I need house wrap behind Hardie siding?

With fiber cement siding, the heavy material may compress the wrap so it’s extremely important that a non-woven wrap is used. … This is because the heavy siding may lead to a build-up of moisture behind it, which in turn, can lead to mold growth and wood rot if that moisture is not properly addressed.

Should HardiPlank be primed?

Using The Proper Materials and Paint- For fiber cement or HardiPlank siding, a very good latex primer should be used to prepare the surface for paint. … For exposed composite siding, it is important to use a primer that matches the correct PH level.

How much does Hardie siding cost installed?

Hardie Board siding materials cost $3 to $6 per square foot, and the labor cost to install is $3 to $7 per square foot. Old siding removal adds $0.25 to $1 per square foot when residing. Get free estimates from siding contractors near you or view our cost calculator below.

How much does hardiplank cost to install?

Hardiplank Siding CostsZip CodeBasicBestInstallation Cost$210.00 – $320.00$420.00 – $540.00Total$610.00 – $880.00$1120.00 – $1350.00Total Average Cost per square foot$7.45$12.35

Should you caulk Hardie siding?

James Hardie DOES NOT recommend using caulk or “H”-jointers for the butt joints of HardiePlank® siding with ColorPlus® technology. James Hardie also DOES NOT recommend applying caulk to the horizontal overlap between siding planks (see Figure 2).

Can you stain Hardie plank?

Hardiplank siding is a long-lasting, fireproof building material that resembles natural wood. Because it is a concrete-based product, it cannot be stained in the traditional sense.