I install more LP siding than any other product, so I get this question a lot — usually from homeowners who've seen "LP SmartSide" on a quote and want to know what they're actually buying. Here's the plain-English version, from someone who hangs the stuff.
The Short Answer
LP siding is engineered wood siding made by Louisiana-Pacific, sold under the brand name LP SmartSide. It's real wood — wood strands and fibers — bound together with resins and waxes and treated with a zinc-borate compound that resists rot, fungal decay, and termites. It gives you the look and warmth of wood without cedar's high maintenance, and it holds up unusually well in a hard climate like Minnesota's.
It comes as lap siding, panels, trim, and shakes, so you can do a whole exterior — walls, gables, accents, trim — in one coordinated system.
What It's Actually Made Of
This is where LP earns its reputation. The "SmartSide" name refers to LP's SmartGuard process: the wood strands get treated with zinc borate (the rot and bug resistance), bound with resin, coated with a wax overlay for moisture resistance, and pressed into boards with a resin-saturated overlay surface that holds primer and paint.
So it's not solid-board wood, and it's not cement. It's engineered wood — strands of real wood re-assembled and treated to outperform the natural board it came from. Think of it as wood that's been engineered to drop its worst weaknesses: rot, insects, and brittleness in the cold.
Why It Works So Well in Minnesota
I keep coming back to LP for Twin Cities homes for a few specific reasons:
- Impact resistance. This is the big one for our climate. Vinyl gets brittle and can crack at -20°F. LP stays tough — it takes a hit from hail or a kid's baseball in deep cold without shattering.
- It holds paint. The factory primer and overlay give paint a surface to really grab. A good coat lasts 15-plus years before it needs a refresh.
- Authentic wood look. The cedar-grain texture reads like real wood from the curb, which matters on a lot of Twin Cities homes.
- Rot and insect resistance. The zinc-borate treatment handles the moisture and pests that destroy untreated wood.
How It Compares
- vs. vinyl: LP costs more up front but resists impact far better in cold weather and gives a truer wood look. See the full vinyl vs LP SmartSide breakdown.
- vs. James Hardie (fiber cement): Both are excellent. Hardie is heavier, fully non-combustible, and lower-maintenance on paint; LP is lighter, a bit more forgiving to install, and usually a little less expensive. The LP SmartSide vs James Hardie comparison goes deep on this.
- vs. cedar: LP gives you most of the cedar look with a fraction of the maintenance. No sealing every few years.
What It Costs and How Long It Lasts
Installed, LP SmartSide runs roughly $8 to $13 per square foot in the Twin Cities in 2026, depending on home size, trim detail, and how much rot repair we find behind the old siding. On a typical home, full re-siding commonly lands in the $18,000 to $35,000 range — see the Minnesota siding cost guide for the full picture.
For lifespan, LP carries a strong manufacturer warranty (commonly up to 50 years prorated on the substrate, with separate finish coverage), and in the field I see it lasting decades when it's installed and maintained correctly. The main maintenance is repainting roughly every 15 years — here's how often LP SmartSide needs to be painted.
The Honest Part
No siding is perfect. With LP, the two things to know:
- It's wood, so it needs paint. Not as often as cedar, but it's not zero-maintenance like vinyl or steel. If "never touch it again" is your priority, steel or vinyl wins on that one axis.
- Installation discipline matters. LP performs beautifully when the bottom edges, end cuts, and openings are detailed and sealed correctly, and it can take on moisture if they're not. This is not a material to hand to the cheapest crew. The product is only as good as the install.
That second point is exactly why I treat the details as non-negotiable on every LP job.
Frequently Asked Questions
What is LP SmartSide made of?
LP SmartSide is engineered wood — real wood strands and fibers bound with resins and waxes and treated with zinc borate through LP's SmartGuard process. The treatment resists rot, fungal decay, and termites, while a resin-saturated overlay gives the surface a wood-grain texture that holds primer and paint well.
Is LP siding the same as wood siding?
It's made from real wood, but it's engineered, not solid-board wood. The manufacturing process re-assembles and treats the wood strands to remove natural wood's biggest weaknesses — rot, insect damage, and cold-weather brittleness — while keeping the authentic wood look and feel.
Is LP SmartSide good for cold climates like Minnesota?
Yes — it's one of the best siding choices for Minnesota. It stays impact-resistant in deep cold where vinyl can crack, resists the moisture and freeze-thaw stress of our climate, and holds paint through big temperature swings. It's the product I install most often on Twin Cities homes.
How long does LP SmartSide last?
With correct installation and maintenance, LP SmartSide lasts decades, and it carries a strong manufacturer warranty (commonly up to 50 years prorated on the substrate). The main upkeep is repainting roughly every 15 years. Installation quality at the edges and openings is the single biggest factor in real-world lifespan.
Is LP SmartSide better than vinyl?
For durability and looks, yes — LP resists impact far better in cold weather and gives a truer wood appearance. Vinyl wins only on lowest upfront cost and zero painting. For most homeowners planning to stay in the home 10-plus years, LP is the better long-term value.
Does LP siding need to be painted?
Yes. It ships primed and is painted after install, and it needs repainting roughly every 15 years in Minnesota. That's much less than cedar (every 3-5 years) but more than maintenance-free vinyl or steel. The trade-off is a better wood look and far better cold-weather toughness than vinyl.
Joe's Note
If you want the warmth of wood without signing up for cedar's maintenance treadmill, LP SmartSide is usually the answer in this market — it's what I install most and what I'd put on my own house. Just don't hand it to a bargain crew. The product is excellent; a sloppy install undoes all of it. Ask whoever quotes it how they detail the bottom edges and openings.
Thinking about LP SmartSide for your home? I'll walk your exterior, show you samples, and quote it line by line against your other options — no pressure. Call 952-206-6339 or request your free estimate online.
Modern Exterior Systems is a women-owned, family-operated roofing and exterior contractor based in Eden Prairie, MN, serving the Twin Cities metro since 2007. Owner Joe Dvorak brings 20+ years of hands-on construction experience, CertainTeed ShingleMaster and Malarkey Emerald certifications, and a LIFETIME workmanship warranty to every project. BBB Accredited with an A+ rating.