LP SmartSide vs. James Hardie: Engineered Wood or Fiber Cement?

Which is right for you: LP SmartSide or James Hardie?

If you want a noticeable step up from vinyl with a real wood look, you plan to stay a good while, and you’re fine with a repaint down the road, LP SmartSide is usually the fit. If you’re thinking in decades, you want the most weather- and fire-resistant board you can put on a house, and the premium tier is in reach, James Hardie is usually the fit. Neither is the “wrong” choice; they answer different questions.

Both sit above vinyl on the investment ladder in our side-by-side materials comparison, and both are products we install. The rest of this article is the detail behind that split, so you can see which side of it your home lands on.

What is engineered wood siding vs. fiber cement siding?

Engineered wood is made from treated wood strands bonded with a resin binder into a dense, uniform board. LP treats the strands to the core during manufacturing, which is what lets a wood product stand up to moisture and insects the way plain lumber can’t. It comes as lap siding in a cedar texture or a brushed-smooth face, plus panel and vertical products for board and batten looks. Our guide covers the line in more depth under engineered wood siding.

Fiber cement is a cement-based board reinforced with cellulose fibers, cured into a plank that behaves more like masonry than wood. James Hardie’s lap siding comes in Select Cedarmill and Smooth textures, with beaded versions of each. It is noncombustible, and the company states plainly that it resists moisture and holds no appeal for woodpeckers or termites. The pillar’s fiber cement section has the overview.

How do they look and feel up close?

From the curb, both read as painted wood clapboard. Up close, the differences show. LP’s cedar texture is deeper and more varied, closer to a rough-sawn board, and it can be manufactured in 16-foot lengths, so a long wall carries fewer butt joints. Hardie’s Cedarmill texture is finer and more even, its boards are denser with a crisp shadow line at each course, and its standard planks are shorter, so a long run shows more joints. Good installers stagger the joints so they disappear.

Color is a wash. Both come primed for field paint or factory finished, and either takes the deep, dark colors that are popular on New England farmhouses right now.

What changes on install day?

This is where the two diverge most, and it’s a bigger part of the price gap than the material itself. Engineered wood is the lighter board, cuts like real wood, and accepts nails the way lumber does, so a crew moves quickly and the long planks go up with fewer seams to flash. Fiber cement is heavy, needs two sets of hands on a long board, and is cut with shears or a dust-controlled saw because it can crack if handled roughly.

What doesn’t change is the condition attached to both warranties: the siding has to go on to the manufacturer’s written specification, over intact house wrap, with the flashing and clearances the instructions call for. Miss that and the coverage is gone regardless of brand, which is the plainest reason the installer matters as much as the material.

How does each handle New England moisture and impact?

Fiber cement is the more forgiving board around water. It doesn’t swell, and a wet spring or a snowbank against the foundation doesn’t bother the material itself. Engineered wood handles the same weather well when its details are right: the factory treatment resists rot, but cut ends need to be sealed, the bottom course needs clearance from soil and standing snow, and the paint film is part of the moisture defense. Skip those and a wood-based product will show it first.

On impact the picture flips a little. Engineered wood has some give and shrugs off a stray baseball or a ladder bump; fiber cement is harder and can chip at a sharp blow, though it is far tougher than vinyl in the cold. LP backs its board against hail up to 1.75 inches when it’s installed and maintained to spec, and Hardie warrants its board to resist hail and termite damage. Either way, the wall behind the siding decides most of what happens in a storm; our pillar’s New England section explains why, and how long siding lasts here puts it in years.

What about paint, finishes, and the warranties?

Both products can arrive primed for paint on site or finished at the factory. LP’s ExpertFinish line offers a set of prefinished colors; Hardie’s ColorPlus Technology is a factory-applied, baked-on color cured between coats. A factory finish means no painting crew in your yard and a more consistent film, and on either product it’s the finish, not the board, that you’ll eventually renew. How that plays out over the years is covered in which siding holds its color best.

The warranty row is the part most comparison pages get wrong. LP’s five-year window covers labor as well as material, then steps to a prorated material feature. Hardie’s 30-year substrate warranty never prorates and transfers to the next owner, but its remedy is the material, not the labor to replace it, and the finish is a separate, shorter, prorated warranty. Neither is better on paper; they cover different things. We line all three brands up in siding warranties compared, and if vinyl is still in the running, start with vinyl versus fiber cement.

Up-front tier vs. what it gives back: siding return by material.

Frequently asked questions

Is engineered wood siding as good as fiber cement siding?

They’re good at different things. Engineered wood gives you the deeper grain, longer planks, and easier install, and wants its paint kept up. Fiber cement is denser, noncombustible, and the longer-horizon board at a higher tier and a heavier install. Neither is a compromise when it matches how long you’ll stay and how much upkeep you’ll do.

Does James Hardie cost more than LP SmartSide?

Generally, yes. Fiber cement sits at the premium tier and engineered wood at the mid tier, mostly because Hardie boards are heavier, cut differently, and take more hands. Your home’s size and shape and what’s behind the old siding move the total far more than the brand does, so compare the two on your own house with a written total.

Does LP SmartSide rot?

It’s engineered not to. The strands are treated during manufacturing and bonded with resin, and the boards hold up to freeze-thaw and impact when cut edges are sealed and the siding stays clear of soil and snow. Like any painted product, it reaches its full life when the finish is maintained.

What do the two warranties actually cover?

LP SmartSide: a 5/50 limited warranty, five years of labor and material, then 50 years prorated on material, with hail to 1.75 inches when installed to spec. James Hardie: a 30-year non-prorated, transferable substrate warranty covering the material only, plus a separate 15-year ColorPlus finish warranty. Both are void if the siding isn’t installed to the manufacturer’s specification.