Fiber Cement Siding: James Hardie vs LP SmartSide vs Allura
You're standing in your driveway in Sterling Heights or Troy, looking at your house, and you know the siding needs to go. The vinyl's cracked, the paint's peeling, or you're just tired of the cheap look. You've heard fiber cement is the way to go—durable, looks like real wood, holds paint forever. But then you start Googling, and now you're drowning in brand names: James Hardie, LP SmartSide, Allura, Nichiha.
Here's the truth from 35 years of installing siding across Southeast Michigan: the brand matters less than you think, and the installer matters more than you've been told. But the brands aren't all the same, either. Each has real differences in composition, warranty structure, and how they perform in Michigan's freeze-thaw cycle.
This is the breakdown we give homeowners when they sit down with us at the kitchen table. No sales pitch. Just what these products actually are, what they cost in Metro Detroit, and what we've seen hold up after ten Michigan winters.
What Fiber Cement Siding Actually Is
Before we compare brands, let's talk about what fiber cement actually is—because there's confusion out there, and some products marketed alongside fiber cement aren't fiber cement at all.
True fiber cement siding is a composite material made from:
- Portland cement (the binder)
- Cellulose fibers (wood pulp, for tensile strength)
- Sand or fly ash (filler material)
- Water (mixed, then cured under pressure)
The result is a dense, non-combustible board that won't rot, won't be eaten by insects, and holds paint better than wood. It's heavy—about 2.5 pounds per square foot compared to vinyl's half-pound. That weight is a feature, not a bug. It means the material has mass, which translates to durability and impact resistance.
Fiber cement was invented in Australia in the 1980s as a replacement for asbestos-cement siding. James Hardie brought it to the U.S. market in the early 1990s, and it's been the gold standard for house siding in Detroit and across the country ever since.
Why Michigan homeowners care: Fiber cement doesn't expand and contract like vinyl does in our temperature swings. It doesn't crack in the cold or warp in the summer sun. It's the closest thing to "install it and forget it" siding you can buy—if it's installed correctly.
James Hardie: The Market Leader
James Hardie is the name most people know. They own about 70% of the fiber cement market in the U.S., and for good reason: they've been refining the product for decades, they have the best warranty structure, and their distribution network is rock-solid.
What Makes James Hardie Different
James Hardie's flagship product is HardiePlank, which comes in a range of profiles: smooth, cedar grain, beaded, and more. They also make HardiePanel (vertical siding), HardieTrim (for corners and window casings), and HardieShingle (for accents).
The key technology is ColorPlus, their factory-applied finish. It's baked on in a controlled environment, which means better adhesion and a more consistent finish than field-applied paint. The warranty on ColorPlus is 15 years, and in our experience, it holds up. We've seen ColorPlus siding installed in Rochester Hills in 2010 that still looks sharp today—no peeling, no fading beyond what you'd expect from any painted surface.
James Hardie also engineers their boards specifically for different climate zones. In Michigan, we install HZ10 product, which is formulated for freeze-thaw resistance. That's not marketing—there's a measurable difference in how the boards handle moisture cycling compared to the HZ5 product used in the South.
The Warranty
James Hardie's warranty is 30 years non-prorated on the siding itself, and 15 years on ColorPlus finish. But here's the catch: the warranty requires installation by a James Hardie–approved contractor. If you hire someone who's not in their network, the warranty drops to 15 years, and it's prorated.
That's not a gimmick. James Hardie is strict about installation standards because fiber cement has to be installed correctly. Wrong fasteners, improper flashing, inadequate clearance from grade—these aren't small details. They're the difference between siding that lasts 50 years and siding that fails in 10.
NEXT Exteriors is a James Hardie–approved installer. We've been through their training, we use their specs, and we warranty our work alongside theirs. When we install James Hardie siding in Metro Detroit, you get the full 30-year coverage.
LP SmartSide: Engineered Wood, Not True Fiber Cement
Here's where we need to clear something up: LP SmartSide is not fiber cement. It's engineered wood—specifically, oriented strand board (OSB) treated with zinc borate and coated with a proprietary resin overlay called SmartGuard.
LP markets SmartSide alongside fiber cement because it competes in the same price range and offers a similar wood-grain aesthetic. But the material science is different, and that matters in Michigan.
What LP SmartSide Actually Is
LP SmartSide is wood strands compressed under heat and pressure, then treated to resist moisture and insects. The SmartGuard coating is applied at the factory, and it does a decent job of protecting the substrate—when it's intact.
The advantage of LP SmartSide is that it's lighter than fiber cement (about 1.5 pounds per square foot), easier to cut on-site, and it comes primed and ready for paint. The warranty is 50 years on the product and 5 years on the factory finish, which sounds impressive until you read the fine print: it's prorated after year one, and there are a lot of exclusions.
The Michigan Problem
We've installed LP SmartSide on dozens of homes in Macomb and Oakland counties. It's a good product if it's installed perfectly and if it's maintained. But here's what we've seen go wrong:
- Edge swelling: If the cut edges aren't sealed properly during installation, moisture can wick into the OSB core. In Michigan's freeze-thaw cycles, that moisture expands and contracts, leading to edge swelling and paint failure.
- Fastener issues: LP SmartSide requires ring-shank nails and specific placement. We've seen other contractors use smooth-shank nails or overdriver the fasteners, which compresses the board and creates weak points.
- Woodpecker damage: Yes, really. LP SmartSide is wood, and woodpeckers know it. We've had two callbacks in the last five years for woodpecker holes in LP siding. Never had that with fiber cement.
That said, LP SmartSide can be a good choice if you're working with a contractor who knows the product and follows the installation manual to the letter. It's about $1–$2 per square foot cheaper than James Hardie, which adds up on a 2,500-square-foot house.
For more on how different siding materials hold up in our climate, see our guide on how long siding lasts in Michigan.
Allura: The Premium Fiber Cement Option
Allura is the brand most homeowners haven't heard of, but it's worth knowing about if you're looking at high-end fiber cement.
Allura is made by Ply Gem, and it's true fiber cement—same basic composition as James Hardie, but with a few differences in manufacturing and finish options. The big selling point is deeper, more realistic wood grain textures and a wider range of factory finishes.
What Sets Allura Apart
Allura uses a proprietary molding process that creates more pronounced grain patterns than HardiePlank. If you're standing on the curb, Allura looks more like real cedar than James Hardie does. That matters to some homeowners—especially in neighborhoods like Bloomfield Hills or Grosse Pointe Farms where curb appeal is everything.
Allura also offers pre-finished shingle siding in styles that mimic hand-split cedar shakes. It's a niche product, but if you're doing a Craftsman or Cape Cod–style home, it's one of the best-looking options on the market.
The Downsides
Allura's distribution is spottier than James Hardie's. Lead times can be longer, and not every distributor stocks the full range of profiles and colors. That's not a dealbreaker, but it's something to plan for.
The warranty is 30 years on the product and 15 years on the finish—similar to James Hardie. But Allura doesn't have the same installer certification program, which means there's less quality control on the installation side. You're relying entirely on your contractor to get it right.
We've installed Allura on a handful of projects in Southeast Michigan. It's a beautiful product. But for most homeowners, the marginal aesthetic improvement over James Hardie doesn't justify the logistics headaches.
How These Materials Perform in Michigan's Climate
Let's talk about what actually matters: how these products hold up in the real world, under real Michigan conditions.
Freeze-Thaw Cycles
Michigan sees an average of 60–80 freeze-thaw cycles per winter. That's 60–80 times that any moisture in your siding freezes, expands, thaws, and contracts. Over a decade, that's 600–800 cycles. That's brutal on any material.
True fiber cement (James Hardie, Allura) handles this well because the material is non-porous at a microscopic level. Water doesn't penetrate the substrate. As long as the paint or factory finish is intact, freeze-thaw cycles don't cause damage.
LP SmartSide is more vulnerable. If water gets into the OSB core—through a cut edge, a fastener hole, or a crack in the SmartGuard coating—it can freeze and expand. That's when you see edge swelling, paint blistering, and eventually, rot.
What we tell homeowners: If you're going with LP SmartSide, budget for repainting every 7–10 years and inspect the siding annually for any signs of moisture intrusion. With James Hardie or Allura, you can go 15–20 years between paint jobs, and you don't need to worry as much about moisture.
Wind and Impact Resistance
Fiber cement is dense and rigid. It doesn't flex in high winds, and it doesn't dent when a ladder leans against it or a kid throws a baseball at it. That's a real advantage in Michigan, where summer storms can bring 60+ mph winds and hail.
LP SmartSide is more prone to impact damage. The resin coating can chip, and if the substrate is exposed, you need to seal it immediately or you'll have moisture problems.
Insulated Siding: Does It Make a Difference?
Some manufacturers offer insulated fiber cement—basically, a foam backer adhered to the back of the board. The claim is that it improves the R-value of your wall assembly and reduces thermal bridging.
The reality: the R-value gain is minimal (about R-1 to R-2), and it doesn't address the bigger thermal issues in most Michigan homes, which are inadequate attic insulation and air leakage around windows and doors.
We've written a full breakdown on insulated siding and real energy savings in Michigan. Short version: insulated siding is a nice-to-have, not a game-changer.
Real Cost Comparison for Southeast Michigan
Let's talk numbers. These are real-world installed costs for a typical 2,500-square-foot two-story Colonial in Metro Detroit, as of early 2026. This includes materials, labor, trim, flashing, and paint (if applicable).
| Product | Cost per Sq Ft (Installed) | Total for 2,500 Sq Ft | Warranty (Product / Finish) |
|---|---|---|---|
| James Hardie HardiePlank (primed) | $10–$13 | $25,000–$32,500 | 30 years / N/A (field paint) |
| James Hardie ColorPlus | $12–$15 | $30,000–$37,500 | 30 years / 15 years |
| LP SmartSide (primed) | $9–$11 | $22,500–$27,500 | 50 years (prorated) / 5 years |
| Allura (primed) | $11–$14 | $27,500–$35,000 | 30 years / N/A (field paint) |
| Allura (pre-finished) | $13–$16 | $32,500–$40,000 | 30 years / 15 years |
A few things to note:
- These prices include everything. Tear-off of old siding, new Tyvek or similar house wrap, flashing, trim, and labor. If a quote comes in significantly lower, ask what's not included.
- Paint adds $3,000–$5,000. If you're going with primed siding, factor in the cost of two coats of quality exterior paint. We use Sherwin-Williams products exclusively for our painting work.
- Complex architecture costs more. If your house has a lot of corners, gables, or decorative trim, expect to be on the higher end of these ranges.
For a detailed breakdown of siding costs in our area, see our post on siding replacement costs in Troy, Michigan.
Why Installation Quality Matters More Than Brand
Here's the thing we tell every homeowner who sits down with us: the brand you choose matters less than the crew installing it.
Fiber cement is an unforgiving material. If it's not installed to spec—proper clearances, correct fasteners, flashing details, caulking—it will fail. And when it fails, it fails in ways that void the warranty.
What Proper Installation Looks Like
Here's what we do on every fiber cement job, regardless of brand:
- 6-inch clearance from grade: Fiber cement can't touch soil, mulch, or grass. We make sure there's at least 6 inches of clearance at the bottom of the wall, and we flash the bottom edge properly.
- 1/8-inch gaps at all joints: Fiber cement expands and contracts with temperature and humidity. We leave expansion gaps at all butt joints and caulk them with a high-quality sealant.
- Proper fastener placement: Every board gets fastened according to the manufacturer's nailing diagram. Too high, and the board can bow. Too low, and you risk cracking.
- Flashing at every penetration: Windows, doors, electrical boxes, hose bibs—everything gets flashed before the siding goes on. This is where most water intrusion happens, and it's where most contractors cut corners.
- Sealed cut edges: Every cut edge gets sealed with paint or primer before installation. This is especially critical with LP SmartSide, but we do it with all products.
We've seen too many fiber cement jobs done wrong. Siding installed directly over old siding without proper furring. No house wrap. Fasteners driven through the face of the board instead of through the nailing flange. These aren't small mistakes—they're warranty-voiding, rot-inducing, expensive-to-fix mistakes.
When you're choosing a contractor for siding work in Metro Detroit, ask to see photos of their flashing details. Ask if they're manufacturer-certified. Ask what they do differently on fiber cement jobs versus vinyl jobs. If they can't answer those questions, keep looking.
For guidance on what to look for in a siding contractor, check out our post on what to look for before you hire a siding contractor in Troy, MI.
The NEXT Exteriors Approach
We've been installing fiber cement siding across Southeast Michigan since the late 1990s. We're James Hardie–approved, we're trained on LP SmartSide and Allura, and we've done enough of these jobs to know where things go wrong.
When you work with NEXT Exteriors, here's what you get:
- A detailed site assessment before we quote. We look at your existing wall assembly, check for rot or structural issues, and make sure the substrate is sound.
- Transparent pricing. Our quotes include everything: materials, labor, disposal, permits. No surprises, no change orders unless you change the scope.
- Manufacturer-certified installation. We follow the installation manuals to the letter, and we document our work with photos for warranty purposes.
- A warranty we stand behind. We warranty our labor for as long as you own the home. If something goes wrong because of our work, we fix it. No questions.
We're not the cheapest option in Metro Detroit, and we don't try to be. We're the option for homeowners who want the job done right the first time, with no callbacks, no drama, and no regrets ten years down the road.
You can see examples of our work in our project gallery, and if you want to see what your home would look like with different siding options, try our home visualizer tool.
Other Services That Pair with Siding Replacement
Most homeowners who replace their siding also need work done on related systems. Here's what we typically recommend:
- Window replacement: If your windows are 15+ years old, it makes sense to replace them before the new siding goes on. We're Detroit's go-to window experts, and we can coordinate the timing so everything integrates cleanly.
- Gutter replacement: Old gutters often need to come off during a siding job anyway. We install seamless gutters in Detroit, MI that are sized correctly for Michigan's rainfall and snow load.
- Roof inspection or replacement: If your roof is near the end of its life, it's smarter to replace it before the siding. We offer full Detroit roofing services, and we can bundle the work to save you time and money.
For a full list of what we do, visit our services page.
Ready to Get Started?
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Frequently Asked Questions
For most Michigan homeowners, yes. James Hardie is true fiber cement, which means it's more resistant to moisture intrusion and freeze-thaw damage than LP SmartSide's engineered wood core. The warranty is stronger, the product is more widely available, and we've seen it hold up better over 20+ years. That said, LP SmartSide can be a good choice if you're budget-conscious and working with a contractor who knows how to install it correctly. The $2,000–$4,000 savings on a typical house can be meaningful.
With proper installation and maintenance, fiber cement siding should last 50+ years in Michigan. The material itself is incredibly durable—it won't rot, won't be eaten by insects, and won't crack in freeze-thaw cycles. The limiting factor is usually the paint or factory finish, which needs to be refreshed every 15–20 years. We've seen James Hardie siding installed in the late 1990s that's still performing perfectly today. For more on siding longevity in our climate, see our guide on how long siding lasts in Michigan.
Technically, yes—but we don't recommend it. Installing fiber cement over old siding (whether vinyl, wood, or aluminum) means you're trapping moisture and hiding potential rot or structural issues. It also makes it harder to install the siding to manufacturer specs, which can void the warranty. The right way to do it is to remove the old siding, inspect the sheathing and framing, make any necessary repairs, install new house wrap, and then install the fiber cement. It costs more upfront, but it's the only way to ensure a long-lasting, warranty-compliant installation.
There's no "best" color—it depends on your home's style, your neighborhood, and your personal taste. That said, we see a lot of homeowners in Southeast Michigan choosing neutral tones: grays, taupes, warm whites, and muted blues. These colors hide dirt well, don't show fading as much as darker colors, and have broad resale appeal. If you're going with a factory finish like James Hardie ColorPlus, stick with lighter colors—dark colors absorb more heat and can experience more expansion and contraction, which can stress the finish over time. Use our home visualizer to see different colors on your house.
If you go with primed fiber cement and have it field-painted, you'll need to repaint every 10–15 years, depending on sun exposure and how well the paint was applied. If you go with a factory finish like James Hardie ColorPlus or Allura's pre-finished product, you can go 15–20 years before you need to repaint, and even then, it's often just touch-ups rather than a full repaint. The factory finishes are more durable because they're baked on in a controlled environment, which means better adhesion and more consistent coverage.
Yes. Fiber cement is non-combustible and has a Class A fire rating (the highest rating for building materials). It won't ignite, won't contribute fuel to a fire, and won't melt or drip like vinyl siding does. This is a real advantage in wildfire-prone areas, but even in Michigan, it's a safety benefit if you live in a densely built neighborhood or near wooded areas. LP SmartSide, being engineered wood, is combustible, though it's treated with fire retardants and has a Class B or Class C rating depending on the product.
Start with your budget and your priorities. If you want the most proven product with the strongest warranty and you're willing to pay a premium, go with James Hardie ColorPlus. If you're budget-conscious and you trust your contractor to install it correctly, LP SmartSide can save you $3,000–$5,000 on a typical house. If you want the most realistic wood-grain texture and you're willing to deal with longer lead times, consider Allura. But honestly, the bigger decision is who installs it. A great contractor can make any of these products perform well. A bad contractor can ruin even the best product. Focus on finding a contractor with a track record, manufacturer certifications, and a warranty they stand behind. For more on choosing the right siding for your home, see our guide on how to choose the right siding for your Michigan home.