Cedar vs Engineered Wood Siding in Boise
Two of the most popular wood-look siding options for Idaho homes — but they perform very differently in Boise's high-desert climate. This side-by-side comparison covers cost, durability, maintenance, fire safety, and real-world performance across the Treasure Valley.
Quick answer
Usually, but the ranges overlap more than most comparisons admit. In the Boise market we price LP SmartSide engineered wood at $8 to $13 per square foot installed and western red cedar at $8 to $16, depending on grade and profile — bevel (lap) cedar sits at the bottom of that range while shingle and board-and-batten profiles sit at the top.
Cedar and engineered wood siding are the two most common choices when Boise homeowners want the warmth and character of real wood on their exterior. Both materials deliver a genuine wood aesthetic that vinyl and fiber cement cannot fully replicate — but the similarities largely end there. Cedar is a natural softwood harvested primarily from western red cedar forests in the Pacific Northwest. Engineered wood siding, most commonly sold under the LP SmartSide brand, is a manufactured product made from wood strands bonded with resin binders, wax, and zinc borate preservatives under high pressure and heat.
The choice between these two materials comes down to how you weigh upfront cost versus long-term maintenance, natural beauty versus manufactured consistency, and fire safety versus traditional aesthetics. Boise's specific climate conditions — repeated winter freeze-thaw cycling, high-desert UV, dry summer heat, hillside and Wildland Urban Interface fire rules, and persistent woodpecker pressure — amplify the differences between cedar and engineered wood in ways that don't apply in milder climates. This guide breaks down every factor that matters for your decision.
This table summarizes the key performance and cost differences between cedar siding and LP SmartSide engineered wood siding as installed in the Boise metro area. Fire-rating and warranty rows are taken from the manufacturer's and the association's own published documents, which are linked at the foot of this page; pricing is our Boise installed rate.
| Factor | Cedar Siding | Engineered Wood (LP SmartSide) |
|---|---|---|
| Cost per Sq Ft (Installed) | $8–$16 | $8–$13 |
| Whole-House Cost (2,000 sq ft) | $16,000–$32,000 | $16,000–$26,000 |
| ASTM E84 Flame Spread | 45 — Class B (WRCLA) | 76–200 — Class C / III (LP) |
| Meets Class A? | No | No — LP states it does not |
| Boise hillside / WUI siding | Not permitted — combustible | Not permitted — combustible |
| Insect Resistance | Natural extractives, diminish with age | Zinc borate — termites and fungal decay only |
| Moisture Resistance | Moderate | High |
| Freeze-Thaw Performance | Fair | Good |
| UV Resistance | Poor (grays without finish) | Good (with paint) |
| Maintenance Frequency | Every 3–5 years (stain) | Repaint before primer is exposed |
| Appearance | Natural grain variation | Consistent wood texture |
| Woodpecker Resistance | Low | Moderate |
| Hail cover | None | Covered to 1.75 in diameter (LP) |
| Warranty | None (natural product) | 5/50 prorated — 5 yr labour + material, then prorated to yr 50 |
Cost estimates reflect Boise-area installed pricing including old siding removal, house wrap, installation, trim, and cleanup. Cedar costs vary significantly by profile and grade — bevel (lap) sits at the bottom of the range, shingle and board-and-batten at the top. Engineered wood pricing is based on LP SmartSide primed lap siding. Flame-spread figures are the Western Red Cedar Lumber Association's published rating for western red cedar and LP's Technical Bulletin No. 001 for LP SmartSide; neither is a substitute for a Fire Code official's determination on your address.
Material cost is the most visible difference between cedar and engineered wood, but the refinish cycle is what separates them over the life of the wall. Here is how the numbers break down for a Boise re-side project. We deliberately do not publish a 20-year total-cost-of-ownership figure: it would require forecasting paint and labour rates two decades out, and any number we printed would be a guess dressed up as data.
| Cost Category | Cedar | Engineered Wood |
|---|---|---|
| Installed per sq ft | $8–$16 | $8–$13 |
| Bevel / lap profile | $8–$11 per sq ft | $8–$13 per sq ft |
| Shingle or board-and-batten | $11–$16 per sq ft | Panel and vertical, priced with lap |
| 2,000 sq ft home, full re-side | $16,000–$32,000 | $16,000–$26,000 |
| Refinish cycle | Re-stain every 3–5 years | Repaint before the primer is exposed |
| Refinish cost per cycle | Quoted at the time — we publish no forward estimate | Quoted at the time — we publish no forward estimate |
Cedar staining frequency assumes semi-transparent stain on south and west exposures in Boise's UV environment. LP's own guidance for SmartSide is to maintain a continuous paint film at all times and repaint before the primer is exposed, rather than to a fixed interval. LP SmartSide ExpertFinish arrives factory-coated in 100% acrylic exterior paint and carries its own 15-year finish warranty alongside the 50-year substrate coverage.
Boise's high-desert climate is one of the most demanding environments for wood siding in the western United States. The combination of UV intensity, freeze-thaw cycling, low humidity, and wildfire proximity creates conditions that reveal every weakness in a siding material within a few years of installation.
UV Exposure in a High-Desert Valley
Boise sits at roughly 2,700 feet in a dry, high-desert valley, and the sun-facing walls of a house here take a harder finish load than the same walls would in a coastal climate. Unfinished cedar grays within 6 to 12 months of installation as UV breaks down the lignin in the wood fibers. Even stained cedar on south- and west-facing walls requires re-staining every 3 to 5 years to maintain color and UV protection. Engineered wood handles Boise's UV better because the resin-saturated surface does not contain exposed lignin — the paint film is the primary UV barrier, and quality exterior paint on engineered wood typically lasts 8 to 12 years before showing significant fading or chalking. This difference in UV durability is the single biggest maintenance cost driver between the two materials.
Freeze-Thaw Cycling
Boise temperatures cross the 32°F threshold repeatedly throughout fall, winter, and early spring. Cedar absorbs moisture through end grain, knots, and any break in the finish — when that moisture freezes and expands (approximately 9% volume increase), it creates checking, splitting, and cupping that accelerates over time. Engineered wood's resin-impregnated manufacturing process limits moisture absorption to very low levels, making it significantly more resistant to freeze-thaw damage. In our experience across the Treasure Valley, engineered wood siding shows fewer freeze-thaw-related failures than cedar over comparable timeframes, particularly on north-facing walls where moisture lingers longest.
Hillside and WUI Areas: Neither One Qualifies
This is the part of the comparison that gets stated backwards most often online, so here it is from the primary documents. The City of Boise's Permit 428 application (Residential Roofing, Siding and Windows) says that siding installed in hillside areas or in a Wildland Urban Interface area must be fire-resistive and/or non-combustible as regulated by the Fire Code. Western red cedar is a combustible wood product. So is LP SmartSide: LP's Technical Bulletin No. 001 states that LP SmartSide siding is a Class C (III) product under ASTM E84, that it does not meet a Class A rating, and that it does not qualify as an ignition-resistant material under Section 503.2 of the International Wildland Urban Interface Code. LP's panel siding complies with IWUIC Class 3 but explicitly not Class 1 or Class 2. If your address is in a Boise hillside or WUI area — the Foothills, East Boise near Table Rock, Eagle properties near the Boise National Forest — the material conversation is fiber cement or another non-combustible cladding, and the assembly has to be confirmed with the Fire Code official before material is ordered.
Woodpecker & Insect Damage
Woodpecker damage is a recurring call for us in the Boise area. Northern flickers drill softwood readily, and cedar is soft enough to work. Carpenter ants are a separate problem and a moisture problem first — they prefer wood that is already wet or partly decayed, which is why they show up near a foundation or a failed flashing detail rather than on dry, sound cladding. Engineered wood is denser and harder than natural cedar, making it more resistant to woodpecker drilling, though not immune — LP's own position is that SmartSide is “not desirable to insects that woodpeckers use as a food source,” which is a different claim from being woodpecker-proof. On insects, be precise about what the treatment does: LP states the SmartGuard process protects against termites and fungal decay, and states plainly that it does not resist carpenter ants and bees the same way, because those insects excavate the wood rather than eat it and so never take in enough zinc borate. LP's answer to carpenter ants is keeping decay out through good flashing and detailing, not the borate itself. Cedar's natural extractives work in the other direction — present from the mill and diminishing with weathering.
Appearance is where cedar holds its strongest advantage. No manufactured product can fully replicate the look and feel of real wood, and for homeowners who prioritize natural beauty above all other factors, cedar remains the premium choice.
Cedar Siding
Natural grain variation — every board is unique with distinctive character
Rich, warm tones ranging from honey gold to deep reddish-brown
Accepts semi-transparent stains that showcase grain patterns
Develops a silver-gray patina if left unstained — prized by some homeowners
Available in lap, shingle, board-and-batten, and tongue-and-groove profiles
Ideal for Craftsman, cabin, and custom home styles in Boise's North End and East Boise
Engineered Wood (LP SmartSide)
Consistent, uniform wood-grain texture across every board and panel
Deep cedar-grain embossing that closely mimics real wood appearance
Holds paint exceptionally well — smooth, even color with no grain bleed-through
Available in lap, panel, trim, and soffit for a fully matched exterior system
No knots, pitch pockets, or natural defects that can affect stain absorption
Popular for farmhouse, modern, and transitional homes across Meridian, Eagle, and Star
The aesthetic choice often aligns with neighborhood character. In Boise's established neighborhoods — the North End, Harrison Boulevard, Warm Springs Avenue, and East Boise — cedar's natural grain and variation complement the Craftsman, Colonial Revival, and mid-century architecture. In newer developments across Meridian, Star, Eagle, and South Boise, engineered wood's consistent appearance and broad paint color options fit the modern farmhouse and transitional styles that dominate new construction.
Maintenance is the area where cedar and engineered wood diverge most dramatically. Cedar is a high-maintenance siding material that rewards diligent care and punishes neglect. Engineered wood requires significantly less ongoing attention, which is why it has become the preferred wood-look siding for homeowners who want the aesthetic without the maintenance commitment.
Cedar Maintenance Schedule
Cedar siding in Boise requires staining or sealing every 3 to 5 years to maintain UV protection and moisture resistance. South- and west-facing walls degrade fastest and may need attention at the 3-year mark, while north-facing walls can stretch to 5 years. Semi-transparent oil-based stains are the preferred finish for cedar in Idaho because they penetrate the grain and allow moisture vapor to escape rather than trapping it beneath a film (which causes peeling). Annual inspection for checking, splitting, cupping, and woodpecker damage is essential. Any exposed raw wood — from splits, holes, or wear — must be sealed promptly to prevent moisture infiltration and accelerated decay. Cedar shingle and shake profiles require extra attention because the layered installation creates more edge grain exposure and potential moisture traps.
Engineered Wood Maintenance Schedule
LP does not publish a repaint interval for SmartSide, and neither will we. What LP does state is the standard the owner has to hold: maintain a continuous paint film at all times and repaint before the primer is exposed. In practice that means the south- and west-facing elevations set the schedule and the shaded elevations come along for the ride. The resin-impregnated surface holds paint better than natural wood because there are no natural oils or pitch pockets to interfere with adhesion. Annual maintenance is a visual inspection for caulk joint failures, paint chips from impact damage, and proper clearance between the siding and ground or landscaping. When repainting is due, prep is simpler than cedar — wash, sand any peeling areas, and apply 100% acrylic exterior paint; follow LP's current application instructions for pressure-washing limits rather than a generic PSI figure. LP SmartSide ExpertFinish arrives factory-coated and carries a 15-year finish warranty alongside the 50-year substrate coverage.
Environmental impact is an increasingly important factor for Boise homeowners choosing between cedar and engineered wood. Both materials have wood-based origins, but their environmental profiles differ significantly in sourcing, manufacturing, and end-of-life disposal.
Cedar is a natural, renewable resource harvested from managed forests in the Pacific Northwest and British Columbia. It requires minimal processing energy — logs are milled into boards with no chemical additives, binders, or preservatives. Cedar is biodegradable at end of life and can be recycled as mulch or biomass. However, old-growth cedar forests are under significant harvesting pressure, and the highest-grade clear cedar increasingly comes from second-growth trees with less heartwood content and lower natural durability than old-growth stock. The carbon footprint of transporting cedar from Pacific Northwest mills to Boise is relatively low given the proximity.
Engineered wood uses fast-growth and small-diameter wood strands that would otherwise go to waste in conventional lumber milling. LP SmartSide's manufacturing process converts these low-value wood byproducts into a high-performance building material, which is an efficient use of the raw material. However, the manufacturing process requires significant energy input for pressing, heating, and resin application. The zinc borate treatment and resin binders mean engineered wood is not biodegradable in the same way as natural cedar. LP states it uses 100% SFI-certified wood from small-diameter, rapidly regenerating trees, and that the borates used are environmentally friendly. Mill location varies by product line and changes over time, so ask your supplier where the specific run you are buying was manufactured rather than assuming a shipping distance.
The best siding choice depends on your specific home, neighborhood, and priorities. Here is where each material excels across the Boise metro area.
Cedar: North End Historic Homes
Craftsman bungalows and period homes along Harrison Boulevard, Warm Springs Avenue, and the North End historic district benefit from cedar's authentic grain and character. Historic review boards often favor natural materials, and cedar's ability to accept semi-transparent stains preserves the architectural heritage of these neighborhoods.
Cedar: Custom Homes & Cabins
High-end custom builds in East Boise, the Boise Bench, and foothill properties (outside WUI zones) where homeowners want a premium, one-of-a-kind exterior. Cedar board-and-batten and channel rustic profiles are especially popular for mountain-modern and cabin-style architecture.
Engineered Wood: Suburban Communities
Neighborhoods throughout Meridian, Eagle, Star, Kuna, and Nampa where modern farmhouse, Craftsman, and transitional styles dominate. LP SmartSide's consistent texture and excellent paint adhesion deliver the clean, uniform look that HOA architectural review committees approve quickly.
Neither One: Boise Hillside & WUI
If the address is in a Boise hillside area or a Wildland Urban Interface area, this comparison does not apply. Boise requires fire-resistive and/or non-combustible siding there, and both cedar and LP SmartSide are combustible wood products — LP states its siding is Class C (III) and is not an ignition-resistant material under IWUIC 503.2. Plan on fiber cement or another non-combustible cladding and confirm the assembly with the Fire Code official.
Cedar: Accent Applications
Using cedar as an accent material — gable ends, porch ceilings, entry surrounds — while cladding the main walls in engineered wood or fiber cement. This hybrid approach delivers the natural wood beauty where it has the most visual impact while minimizing the maintenance footprint.
Engineered Wood: Rental & Investment Properties
Investment properties and rentals across the Treasure Valley where minimizing maintenance cost and maximizing durability are top priorities. Engineered wood's lower maintenance frequency and longer paint cycles reduce long-term operating costs compared to cedar.
Is cedar or engineered wood siding cheaper in Boise?
Usually, but the ranges overlap more than most comparisons admit. In the Boise market we price LP SmartSide engineered wood at $8 to $13 per square foot installed and western red cedar at $8 to $16, depending on grade and profile — bevel (lap) cedar sits at the bottom of that range while shingle and board-and-batten profiles sit at the top. So the cheapest cedar profile and mid-grade engineered wood land in the same place; the gap opens up at the premium cedar grades. Where engineered wood separates itself is maintenance: cedar needs re-staining every 3 to 5 years on Boise's sun-facing walls, engineered wood repainting on a longer cycle. Price both against your actual profile choice rather than against a headline per-square-foot number.
Which siding handles Boise's freeze-thaw cycles better?
Engineered wood siding handles Boise's repeated winter freeze-thaw cycling better than cedar in most installations. LP SmartSide is manufactured with zinc borate and resin binders that limit moisture absorption to very low levels, meaning there is less water inside the material to expand during freezing. Cedar is naturally porous and absorbs moisture through end grain, knots, and any break in the stain or finish. When that absorbed moisture freezes, it creates internal stress that can cause checking, splitting, and cupping over time. Properly maintained cedar with sealed end cuts and consistent staining performs adequately, but it requires more diligence than engineered wood to prevent freeze-thaw damage in the Treasure Valley.
Can I use cedar or engineered wood siding in Boise's hillside and WUI areas?
No — not as a stand-alone cladding. The City of Boise's Permit 428 application states that siding installed in hillside areas or in a Wildland Urban Interface area must be fire-resistive and/or non-combustible as regulated by the Fire Code, and that roof coverings and siding materials in those areas must be non-combustible. Neither material clears that bar. Western red cedar is a combustible wood product. LP SmartSide is too: LP's own technical bulletin states that LP SmartSide siding is a Class C (III) product under ASTM E84, that it does NOT meet a Class A rating, and that it does NOT qualify as an ignition-resistant material under Section 503.2 of the International Wildland Urban Interface Code. If your home is in a Boise hillside or WUI area, the conversation is about fiber cement or another non-combustible cladding, and the assembly has to be confirmed with the Fire Code official before you order material.
How long does each siding type last in Idaho's climate?
Neither manufacturer nor association publishes a service-life figure for Idaho specifically, so we will not invent one. What is documented is the warranty: LP SmartSide carries a 5/50 prorated limited warranty — LP covers 100% of labour and material for the first five years from installation, then covers material cost less a 2.22% annual pro-rata reduction through year 50. Cedar is a natural product and carries no manufacturer warranty at all; the Western Red Cedar Lumber Association says only that properly finished and maintained cedar 'will deliver decades of trouble-free service.' The practical difference is variance: cedar's outcome swings hard on whether it actually gets re-stained every 3 to 5 years, while engineered wood's zinc borate and resin binders hold up more predictably through a missed maintenance cycle.
Does cedar or engineered wood siding increase home value more in Boise?
We do not publish recoup percentages for either material. There is no Boise-specific resale study behind figures like that, and national cost-versus-value averages do not transfer to one address. What we can say about the Treasure Valley market is a matter of fit rather than percentage: cedar reads as a premium, hand-finished material in the established neighbourhoods where the surrounding architecture is period wood — the North End, Harrison Boulevard, East Boise — and engineered wood reads as correct in the newer developments across Meridian, Eagle, Star and Nampa, where the modern farmhouse and transitional styles around it are themselves painted-finish exteriors. Siding that matches its street photographs better and argues with the appraiser less.
Dive deeper into the specific siding materials discussed in this comparison, or explore our full siding installation services and cost guides.
The following government agencies, industry organizations, and official resources provide additional information relevant to your remodeling project.
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