LP SmartSide vs James Hardie Siding: Michigan Comparison
If you're standing in a showroom in Sterling Heights or scrolling through siding options at 11 PM in Rochester Hills, you've probably landed on the same two names: LP SmartSide and James Hardie fiber cement. Both are marketed as premium, both promise decades of protection, and both cost significantly more than vinyl.
So which one actually holds up better when a Michigan winter dumps 18 inches of lake-effect snow on your roof, when spring runoff from ice dams soaks your walls, and when July humidity sits at 80% for a week straight?
We've been installing both products across Southeast Michigan since the early 2000s — on brick Colonials in Grosse Pointe, 1960s ranches in Warren, and new construction in Shelby Township. We've also been called back to fix installations done wrong by other contractors. Here's what 35 years of Detroit siding installation has taught us about these two materials, and which one makes sense for your home.
What LP SmartSide Actually Is (And What It Isn't)
LP SmartSide is engineered wood — not solid wood, not composite, not plastic. It's made from wood strands treated with zinc borate (for termite and fungal resistance), compressed under heat and pressure, then coated with a resin-saturated overlay. LP calls this the SmartGuard process.
The result is a substrate that looks and cuts like wood, holds paint well, and resists rot better than traditional wood siding. It comes in lap siding, panel siding, and trim profiles. Most homeowners choose the 7/16-inch lap siding with a smooth or cedar texture finish.
Here's what matters for Michigan:
- It's dimensionally stable. Engineered wood doesn't warp or split like solid cedar or pine. The resin treatment locks the strands in place.
- It absorbs less moisture than untreated wood. The zinc borate treatment and resin coating slow water penetration, but it's not waterproof. If water gets behind the siding through poor flashing or trim gaps, it can still cause swelling.
- It's lighter than fiber cement. A 16-foot piece of LP SmartSide weighs about 40% less than the same length of James Hardie. That makes installation faster and reduces structural load on older homes.
- It comes primed, not finished. You'll need to paint it after installation. LP recommends a 100% acrylic latex paint applied within 180 days of installation.
The warranty is a 5/50 structure: 5 years of coverage against manufacturing defects (full replacement), then 50 years of prorated coverage. That means if your siding fails in year 25, LP covers a percentage of the replacement cost, not the full amount.
Michigan Reality Check: We've seen LP SmartSide perform well on homes in Troy and Clinton Township when installed correctly — proper flashing, sealed cut ends, 1/8-inch gaps at butt joints. We've also seen it fail spectacularly when contractors skip the trim seal step or don't back-prime cut edges. Water intrusion at trim boards is the most common failure point.
What James Hardie Fiber Cement Brings to the Table
James Hardie is fiber cement — a mix of cement, sand, and cellulose fiber. It's extruded into planks, cured, and either primed or factory-finished with ColorPlus Technology (a baked-on acrylic coating).
Fiber cement has been around since the 1980s, but James Hardie dominates the market because of brand recognition and a strong warranty. HardiePlank lap siding is the most common product we install, typically in the 5/16-inch or 1/4-inch thickness.
Here's what you need to know:
- It's non-combustible. Fiber cement won't ignite. That's a selling point in wildfire zones, less relevant in Michigan, but it does earn you a small insurance discount in some cases.
- It's heavy. A 12-foot HardiePlank weighs about 2.3 pounds per square foot. That's roughly double the weight of LP SmartSide. Installation takes longer, and you need proper fastening into studs — not just sheathing.
- It doesn't absorb water like wood. Fiber cement is porous, but it doesn't swell or rot. Water passes through it without causing structural damage. The paint or ColorPlus finish is what protects the surface from staining and efflorescence (white mineral deposits).
- It can crack. If installed too tight, without expansion gaps, or if fastened incorrectly, fiber cement can crack under thermal expansion. We've seen this on south-facing walls in Royal Oak and Birmingham where summer heat causes the planks to expand.
James Hardie's warranty is 30 years, non-prorated for the product itself, and 15 years for ColorPlus finishes. That's a stronger warranty structure than LP SmartSide's prorated model.
How Each Performs in Michigan's Freeze-Thaw Cycles
This is where the rubber meets the road — or, more accurately, where ice meets your siding at 3 AM in January.
Michigan's freeze-thaw cycle is brutal. Temperatures swing from 15°F overnight to 38°F by noon. Snow melts, water runs down your walls, then refreezes in the evening. That cycle repeats 40-60 times per winter in Southeast Michigan. Any material that absorbs water and then freezes will eventually fail.
LP SmartSide in Freeze-Thaw Conditions
LP SmartSide's engineered wood substrate is treated to resist moisture, but it's not immune. If water gets behind the siding — through a poorly sealed trim joint, a missing kickout flashing at the roof-to-wall transition, or a cracked caulk line — the substrate can absorb moisture. When that moisture freezes, it expands. Over multiple freeze-thaw cycles, that expansion can cause delamination (the overlay separating from the wood core) or edge swelling.
We've seen this most often on north-facing walls in Macomb County, where snow accumulation is highest and sun exposure is lowest. The siding stays wet longer, giving moisture more time to penetrate.
The fix: Proper installation is everything. Every cut end must be sealed with paint or a compatible sealant. Every trim board needs a continuous bead of sealant behind it. Every window and door opening needs proper flashing integrated with the water-resistive barrier. When we install LP SmartSide as part of our exterior services in Detroit, we treat it like a rainscreen system — the siding is the first line of defense, but the flashing and drainage plane behind it are what keep water out of the wall assembly.
James Hardie in Freeze-Thaw Conditions
Fiber cement handles freeze-thaw cycles better than engineered wood because it doesn't absorb water in the same way. Water can pass through the porous cement matrix, but it doesn't cause swelling or structural damage. The paint or ColorPlus finish is what prevents surface degradation.
The failure mode for James Hardie in Michigan is cracking, not rot. If the planks are installed too tight (without the required 1/8-inch gaps at butt joints and end-to-end seams), thermal expansion in summer can cause compression stress. When winter hits and the material contracts, those stress points crack.
We've also seen cracking on homes where the contractor face-nailed the siding instead of blind-nailing it. Face nailing (driving nails through the face of the plank) locks the material in place and prevents natural expansion. Blind nailing (nailing through the top edge, hidden by the next course) allows the plank to move slightly.
The fix: Follow James Hardie's installation manual to the letter. Maintain 1/8-inch gaps, use blind nailing, and caulk all butt joints with a paintable, flexible sealant. If you're in an area with ice dam problems — like Lake Orion or Chesterfield, where attic insulation and ventilation are often substandard — make sure your contractor addresses the roof and attic issues before replacing the siding. Ice dams dump water down walls in volumes that no siding can handle without proper flashing.
Real-World Data: Over 35 years, we've seen fewer callbacks for water damage on James Hardie installations than LP SmartSide. That doesn't mean LP is a bad product — it means the margin for installation error is smaller. One missed seal at a trim board, and you're looking at swelling and delamination within 3-5 years.
Cost Reality: What You'll Actually Pay in Metro Detroit
Let's talk numbers. Homeowners in Southeast Michigan are practical — they want to know what this costs and whether it's worth it.
Material Costs
As of early 2026, here's what we're paying for materials (before markup):
- LP SmartSide lap siding: $1.80–$2.50 per square foot, depending on texture and profile.
- James Hardie HardiePlank (primed): $2.20–$3.00 per square foot.
- James Hardie HardiePlank (ColorPlus factory finish): $3.50–$4.50 per square foot.
So on material alone, LP SmartSide is 20-30% cheaper than primed James Hardie, and 40-50% cheaper than ColorPlus.
Labor Costs
LP SmartSide installs faster because it's lighter and cuts more easily. A typical 2,000-square-foot ranch in Warren takes about 4-5 days to side with LP SmartSide, versus 6-7 days for James Hardie. That translates to lower labor costs — usually $2.00–$3.00 per square foot for LP, versus $3.50–$4.50 per square foot for James Hardie.
But here's the catch: LP SmartSide requires painting after installation. If you're paying a professional to paint it (which we recommend — DIY paint jobs on siding rarely hold up), add another $1.50–$2.50 per square foot. Suddenly, the cost gap narrows.
Total Installed Cost (2,000 sq ft home)
- LP SmartSide (primed, then painted): $14,000–$18,000
- James Hardie HardiePlank (primed, then painted): $16,000–$21,000
- James Hardie ColorPlus (factory finish, no painting): $19,000–$25,000
These numbers include removal of old siding, installation of new water-resistive barrier, flashing, trim, and finish work. They don't include structural repairs (rotted sheathing, framing issues) or window replacement, which often come up during siding jobs on older homes.
Long-Term Costs
LP SmartSide will need repainting every 10-15 years, depending on sun exposure and paint quality. Figure $5,000–$8,000 per repaint for a 2,000-square-foot home.
James Hardie with a quality paint job will last 15-20 years before needing a repaint. ColorPlus finishes are warrantied for 15 years and typically last 20-25 years before showing significant fading.
Over a 30-year period, LP SmartSide will cost you 2-3 repaints. James Hardie will cost you 1-2. That's a difference of $5,000–$10,000 in maintenance costs, which closes the gap between the two products.
Installation Differences (And Why They Matter)
Here's where most contractors cut corners, and where most siding failures originate.
Fastening Requirements
LP SmartSide: Can be nailed or stapled. LP recommends stainless steel or hot-dip galvanized nails, 6-inch spacing along studs, 3/8-inch from edges. Staples are allowed in some applications, which speeds up installation but increases the risk of fastener corrosion over time.
James Hardie: Must be nailed, not stapled. Hardie requires blind nailing for lap siding (nails driven through the top edge, 1 inch from the top, 3/4 inch from ends). Face nailing is only allowed on trim and panel products. Fasteners must penetrate studs by at least 1 inch.
We've fixed dozens of Hardie jobs where contractors face-nailed the planks because it's faster. Those installations crack within 5 years.
Flashing and Trim Details
Both products require proper flashing at all penetrations — windows, doors, vents, light fixtures. But LP SmartSide is more sensitive to water intrusion at trim boards because the wood substrate can swell.
Every LP SmartSide trim board needs a continuous bead of sealant on the back side before installation. Every cut end needs to be sealed with paint or a compatible sealant. Miss one corner board, and you're looking at water damage within 2-3 years.
James Hardie trim is more forgiving because it doesn't swell, but it still needs proper flashing. We use a combination of peel-and-stick flashing tape at all openings, integrated with the water-resistive barrier (usually Tyvek or a similar product). That's standard practice for any house siding installation in Detroit.
Painting and Finishing
LP SmartSide comes primed. You can paint it any color, but LP recommends a 100% acrylic latex paint with a Light Reflective Value (LRV) of 55 or higher. Dark colors (LRV below 55) absorb more heat, which can cause the substrate to expand and contract more aggressively. We've seen edge swelling on LP SmartSide painted dark brown or navy blue on south-facing walls.
James Hardie primed siding also accepts any paint, but if you're going dark, you need to use a paint formulated for fiber cement (higher solids content, better adhesion). Or you can order ColorPlus, which comes pre-finished in 20+ colors. ColorPlus costs more upfront, but it's baked on in a controlled environment and carries a 15-year warranty. It's the best option if you want a dark color — ColorPlus can handle LRVs down to 30 without voiding the warranty.
We partner with Sherwin-Williams for exterior painting on all our siding jobs. Their Duration or Emerald lines hold up well on both LP SmartSide and James Hardie, and they offer a 15-year warranty when applied by a licensed contractor.
Which One We Recommend (And When)
After installing hundreds of homes with both products across Macomb, Oakland, and St. Clair counties, here's our honest take:
Choose LP SmartSide If:
- Budget is your primary concern. LP SmartSide costs 20-30% less than James Hardie upfront, and that gap matters if you're trying to stay under a certain number.
- You're planning to paint it yourself or hire a painter separately. LP SmartSide comes primed and accepts paint easily. If you've got a trusted painter or you're comfortable doing it yourself, you can save money.
- Your home has good roof drainage and no ice dam history. LP SmartSide performs well when water management is handled correctly. If your gutters are clean, your roof is in good shape, and your attic is properly insulated and ventilated, LP is a solid choice.
- You're working on a newer home (built after 2000) with modern flashing details. Newer construction in Shelby Township or Chesterfield typically has better water management built in. LP SmartSide is a good fit for these homes.
Choose James Hardie If:
- You want the longest-lasting, lowest-maintenance option. James Hardie with ColorPlus will outlast LP SmartSide by 5-10 years before needing a repaint, and it's less sensitive to installation errors.
- Your home has ice dam problems or poor roof drainage. Fiber cement handles moisture exposure better than engineered wood. If you're in Lake Orion, Sterling Heights, or another area with heavy snow and ice dam issues, James Hardie is the safer bet.
- You're in a historic district or high-end neighborhood. James Hardie has better brand recognition and perceived value. If you're in Grosse Pointe Farms or Bloomfield Hills, buyers expect to see Hardie on the listing.
- You want a dark color (LRV below 55). ColorPlus handles dark colors better than LP SmartSide. If you want charcoal, navy, or deep red, go with Hardie.
Homes Where Either Works
Most 1960s-1980s ranches and Colonials in Warren, Troy, or Clinton Township can take either product. The deciding factor is usually budget and how much you trust your contractor to install it correctly.
If you're getting quotes and one contractor is pushing LP SmartSide at $12,000 while another is pushing James Hardie at $22,000, ask why. The gap shouldn't be that wide unless one contractor is cutting corners or the other is overcharging.
Red Flag: If a contractor tells you LP SmartSide is "just as good" as James Hardie but doesn't explain the installation differences — flashing, trim sealing, cut-end treatment — walk away. LP SmartSide is a good product when installed correctly, but it requires more attention to detail than fiber cement.
What About Resale Value?
In Southeast Michigan, both LP SmartSide and James Hardie add resale value compared to vinyl siding. Buyers see "engineered wood" or "fiber cement" on the listing and know it's a step up.
James Hardie has slightly better brand recognition, especially in higher-end markets like Rochester Hills or Grosse Pointe. Realtors will mention "James Hardie siding" in the listing description. They're less likely to call out "LP SmartSide" by name.
But here's the truth: most buyers won't know the difference between the two once they're painted. What they'll notice is curb appeal, condition, and whether the siding looks new or tired. A well-installed LP SmartSide job with a quality paint finish will sell just as well as a James Hardie job.
If you're preparing a home for sale and need fast, reliable work, both products are good options. We've worked with realtors across Metro Detroit on pre-sale exterior upgrades, and the feedback is consistent: fresh siding (either product) is one of the highest-ROI improvements you can make.
Other Services to Consider
If you're replacing siding, this is the time to address other exterior issues. We often bundle siding jobs with window replacement in Detroit, insulation upgrades, or seamless gutter installation. Doing it all at once saves money on mobilization and ensures everything is integrated correctly — new windows flashed into new siding, new gutters matched to the new trim color, etc.
Ready to Get Started?
NEXT Exteriors has been protecting Michigan homes since 1988. We install both LP SmartSide and James Hardie siding across Southeast Michigan — and we'll tell you honestly which one makes sense for your home and budget. Get a free, no-pressure estimate from a team that shows up on time and does the job right.
Get Your Free QuoteOr call us: (844) 770-6398
Frequently Asked Questions
Yes, in most cases. LP SmartSide's engineered wood substrate accepts paint more readily than fiber cement because it has a slightly porous surface that allows for better mechanical adhesion. James Hardie requires a primer specifically formulated for fiber cement, and the paint needs higher solids content for proper adhesion. That said, both products hold paint well when the surface is properly prepped and the right paint is used. We use Sherwin-Williams Duration or Emerald on both, and we've seen excellent results. The bigger factor is surface prep — clean, dry, and properly primed.
Yes, if it's installed incorrectly. James Hardie fiber cement expands and contracts with temperature changes. If the planks are installed too tight (without the required 1/8-inch gaps at butt joints and seams), they can't move freely. That creates compression stress in summer and tension stress in winter, leading to cracks. We've seen this on south-facing walls in Royal Oak and Birmingham where summer heat causes maximum expansion. The fix is simple: follow Hardie's installation manual. Maintain gaps, use blind nailing, and caulk all joints with a flexible sealant. When installed correctly, James Hardie handles Michigan winters without cracking.
James Hardie typically lasts longer — 30-50 years versus 25-40 years for LP SmartSide. Fiber cement is more resistant to moisture damage, which is the primary failure mode for siding in Michigan. LP SmartSide can last just as long if it's installed perfectly and maintained well (repainted every 10-15 years, trim joints resealed as needed), but the margin for error is smaller. We've seen 20-year-old James Hardie installations in Clinton Township that still look great. We've also seen 10-year-old LP SmartSide jobs that failed because the contractor skipped the trim sealing step. The product matters, but installation quality matters more.
Yes, by about 20-30% on the installation side. LP SmartSide is lighter and cuts more easily, so labor costs are lower. A typical 2,000-square-foot home takes 4-5 days to side with LP versus 6-7 days for James Hardie. But LP SmartSide requires painting after installation, which adds $1.50–$2.50 per square foot if you hire a professional. James Hardie can be ordered with ColorPlus factory finish, which eliminates the painting step. When you factor in the painting cost, the gap between the two narrows to about 10-15% on total installed cost.
Yes, eventually. LP SmartSide will need repainting every 10-15 years, depending on sun exposure, paint quality, and how well the surface was prepped. James Hardie with a quality paint job lasts 15-20 years before needing a repaint. ColorPlus factory finishes are warrantied for 15 years and typically last 20-25 years before showing significant fading. The repainting process is the same for both products — clean the surface, spot-prime any bare areas, then apply two coats of 100% acrylic latex paint. If you're in a high-sun area (south-facing walls in Sterling Heights or Shelby Township), expect to repaint on the shorter end of those ranges.
James Hardie, for two reasons. First, fiber cement can be milled to match historic profiles — clapboard, shingle, board-and-batten — more accurately than LP SmartSide. Second, James Hardie has better brand recognition in high-end markets, which matters for resale value. If you're in a historic district with strict architectural guidelines, check with your local preservation commission before choosing a product. Some districts require wood siding, period. But if engineered products are allowed, James Hardie is the safer choice. We've worked on several historic homes in Grosse Pointe Farms and Birmingham, and Hardie's Artisan lap siding (which mimics traditional clapboard) gets approved more often than LP SmartSide.
A reputable contractor should offer a workmanship warranty separate from the manufacturer's product warranty. At NEXT Exteriors, we provide a 5-year workmanship warranty on all siding installations, covering installation defects, flashing failures, and trim issues. The manufacturer's warranty (5/50 for LP SmartSide, 30 years for James Hardie) covers product defects — warping, delamination, cracking due to manufacturing issues. But that warranty is void if the siding isn't installed per the manufacturer's specs. That's why contractor selection matters. A cheap installation with no workmanship warranty is a gamble. If something goes wrong in year 3, you're paying out of pocket to fix it.