Composite Decking
Engineered wood-plastic composite decking for Boise homes — Trex, TimberTech, and Fiberon installation with 25–50 year warranties. Zero staining. Zero sealing. Built for the Treasure Valley's extreme climate.
Composite decking is an engineered building material made from a blend of recycled wood fiber and plastic polymer, bonded under heat and pressure into boards that mimic the look and texture of natural wood. Modern composite boards are wrapped in a protective polymer shell — called “capping” — that resists moisture, UV radiation, scratches, and staining. The result is a deck surface that never needs painting, staining, or sealing for the life of the product.
The technology has advanced dramatically since the first-generation composites of the early 2000s. Today's capped composites from brands like Trex, TimberTech, and Fiberon carry warranties ranging from 25 to 50 years and are available in dozens of colors and grain patterns that are virtually indistinguishable from real hardwood. They've become the most popular decking material in the Boise metro area, accounting for approximately 60% of the new decks we build across the Treasure Valley.
Composite boards are typically available in standard lumber dimensions — 5/4″ x 6″ (actual ~1″ x 5.5″) in lengths of 12, 16, and 20 feet. Most brands offer both grooved-edge profiles (for hidden fastener systems) and square-edge profiles (for face screwing). Board widths of 8 inches and 12 inches are available in some premium lines for a more contemporary plank look.
We install all three major composite decking brands. Each offers multiple product lines at different price points, giving you flexibility to match your budget and design vision. All three brands are available through our local Boise suppliers with typical lead times of 1–2 weeks.
Trex
Most Popular in Boise
Trex is the world's largest composite decking manufacturer and the brand most Boise homeowners request by name. Made from 95% recycled materials (reclaimed wood and polyethylene plastic), Trex boards are capped on three sides with a proprietary shell that resists fading, staining, and mold.
Trex Enhance
$30 – $40 / sq ft
Entry-level line. Two collections: Basics (6 colors) and Naturals (6 colors). 25-year limited warranty. Scalloped or solid profiles. Best for budget-conscious projects where low maintenance is the primary goal.
Trex Select
$38 – $45 / sq ft
Mid-range line with a more refined grain pattern and deeper color saturation. 25-year fade & stain warranty. Solid profile only. The sweet spot for most Boise homeowners who want a premium look without premium pricing.
Trex Transcend
$45 – $55+ / sq ft
Premium line with the most realistic wood grain and deepest color palette. Two collections: Lineage (6 colors) and Tropics (5 colors). 50-year limited warranty with 50-year fade & stain coverage. Top-tier choice for high-visibility decks.
TimberTech
TimberTech (owned by AZEK) offers both wood-plastic composite and advanced PVC lines. Their composite products use a 4-sided polymer cap and are known for industry-leading fade and stain warranties. TimberTech boards tend to have a slightly more refined edge detail and tighter color consistency than competitors.
TimberTech EDGE
$38 – $48 / sq ft
Entry-to-mid composite line. 4-sided capping. 30-year structural, 30-year fade & stain warranty. Available in 4 colors. Solid profile with hidden fastener compatibility. Excellent value for Boise projects.
TimberTech PRO
$45 – $55+ / sq ft
Premium composite with three collections: Legacy, Terrain, and Reserve. Multi-tonal streaking mimics natural hardwood. 50-year structural warranty with 50-year fade & stain coverage. The closest composite to real wood appearance.
TimberTech Advanced PVC
$50 – $65+ / sq ft
Full PVC (no wood fiber). Lightest weight, stays cooler than composite. 50-year warranty. Best for pool surrounds, waterfront, and homes wanting the ultimate in moisture resistance. See our PVC decking page for details.
Fiberon
Fiberon is the value leader in capped composite decking. Their products use PermaTech cap technology and are competitively priced while still offering strong warranty coverage. Fiberon is an excellent choice for Boise homeowners who want the benefits of composite decking at the most accessible price point.
Fiberon Good Life
$28 – $38 / sq ft
Entry-level capped composite with 3-sided capping. 25-year stain and fade warranty. Available in 6 colors. Cabin and Weekender collections. The most affordable capped composite on the market.
Fiberon Sanctuary
$38 – $48 / sq ft
Mid-range with multi-chromatic streaking for a more natural wood appearance. 25-year structural and performance warranty. 6 colors available. 4-sided PermaTech cap for full protection.
Fiberon Paramount
$48 – $58+ / sq ft
Premium PVC line (not composite). Mineral-based core with no wood fiber. Stays cooler, lighter weight, and highest moisture resistance. 50-year warranty. Direct competitor to TimberTech Advanced PVC.
All prices below are fully installed costs including materials, substructure (pressure-treated frame, footings, ledger board), hidden fasteners, and labor. Prices reflect the Boise market as of early 2026 and include standard railing on two sides. Permit fees ($150–$400) are additional.
| Tier | Products | Per Sq Ft | Warranty |
|---|---|---|---|
| Entry-Level | Trex Enhance, Fiberon Good Life | $30 – $40 | 25 years |
| Mid-Range | Trex Select, TimberTech EDGE, Fiberon Sanctuary | $38 – $48 | 25–30 years |
| Premium | Trex Transcend, TimberTech PRO | $45 – $55+ | 50 years |
Complete Deck Cost by Size
| Deck Size | Sq Ft | Entry-Level | Mid-Range | Premium |
|---|---|---|---|---|
| 12′ × 16′ | 192 | $6,500 – $8,000 | $8,000 – $9,500 | $9,500 – $11,000 |
| 16′ × 20′ | 320 | $10,000 – $13,000 | $13,000 – $15,500 | $15,500 – $17,000 |
| 20′ × 24′ | 480 | $14,000 – $19,000 | $19,000 – $23,000 | $22,000 – $24,000+ |
Prices include standard two-side aluminum railing, hidden fasteners, pressure-treated substructure, concrete footings to 36″ frost depth, and all labor. Multi-level decks, built-in benches, pergolas, and lighting add to the total. Request a custom estimate for your specific project.
Composite decking is engineered for durability, but no material is perfect. Here's an honest assessment of how composite performs in Boise's high-desert environment at 2,730 feet elevation.
Advantages
Considerations
Higher upfront cost than wood
Roughly 2x the installed price of pressure-treated lumber, though lifetime cost is lower.
Heat retention in direct sun
Dark colors can reach 140–170°F on Boise’s 100°F+ summer days. Choose lighter colors for barefoot use.
Scratches visible on capped surface
Deep scratches penetrate the cap layer and cannot be sanded out like wood. Minor scratches often fade over time.
Cannot be refinished or restained
Unlike wood, you cannot change the color once installed. Choose your color carefully.
Limited color change options
If you tire of the color after 10 years, the only option is board replacement, not a fresh coat of stain.
Thermal expansion requires proper gapping
Boards expand and contract with temperature swings. Incorrect gap spacing causes buckling or excessive gaps.
Boise's climate pushes outdoor building materials harder than most cities in the Pacific Northwest. With temperature swings from −10°F to 105°F, intense UV at 2,730 feet, and 120+ freeze-thaw cycles per year, every material is tested to its limits. Here's how composite decking holds up across each challenge.
UV Performance at 2,730 Ft
Boise receives 25–30% more UV radiation than sea-level cities due to elevation and 210+ clear days per year. Modern capped composites include UV stabilizers in the cap layer that absorb and deflect ultraviolet energy. Premium lines (Trex Transcend, TimberTech PRO) carry 50-year fade warranties that cover Boise's UV intensity. Early-generation uncapped composites faded significantly — current products do not share that weakness.
Freeze-Thaw Cycling
Boise averages 120+ days per year where the temperature crosses the 32°F threshold. Each freeze-thaw cycle drives moisture expansion and contraction into material surfaces. Wood absorbs water and cracks over time. Composite's polymer cap creates a moisture barrier that prevents water from penetrating the core. The result: no splitting, no checking, and no structural degradation from freeze-thaw cycling — a major advantage over untreated wood.
Thermal Expansion Management
Composite boards expand and contract with temperature changes. In Boise, where surface temperatures can swing 100+ degrees between a winter night and a summer afternoon, proper gapping at installation is critical. We follow each manufacturer's gapping specifications precisely — typically 1/8″ to 3/16″ between board ends and 1/16″ to 1/8″ between board edges. Incorrect gapping is the number-one cause of composite deck failures we see on repair calls.
Heat Retention
South- and west-facing deck surfaces absorb the most solar energy. In Boise's July and August heat (regularly exceeding 100°F air temperature), dark composite boards can reach 140–170°F — uncomfortable for bare feet. We recommend lighter colors (grays, tans, weathered tones) for south/west exposures and darker colors for north/east-facing or shaded sections. A pergola or shade structure can reduce surface temperature by 20–40°F.
Snow & Ice Performance
Boise averages 18–20 inches of snowfall per year. Composite decking handles snow load without issue — the material won't absorb moisture or stain from snowmelt like wood. For ice removal, use calcium chloride (safe for composite) or a plastic shovel. Avoid metal shovels and rock salt, which can scratch the cap layer or leave residue. The textured surface of capped composite provides better traction than smooth wood when wet or lightly iced.
Wildfire & Ember Resistance
Boise's proximity to the foothills and Boise National Forest means wildfire risk is a real consideration for many properties. Most composite decking carries a Class C fire rating (Class B for some premium lines). Composite does not ignite as easily as dry wood and is less likely to sustain ember ignition. However, it is not fireproof. Homes in wildland-urban interface zones should consult local fire district requirements for additional defensible space standards.
Composite decking excels in specific applications where its low-maintenance properties and long warranty deliver the greatest return on investment.
Primary Outdoor Living Spaces
Large entertaining decks attached to the main living area benefit most from composite’s zero-maintenance advantage. A 300+ sq ft deck that would need $500–$900 in stain every 2–3 years makes composite the clear financial winner within a decade.
Pool & Hot Tub Surrounds
Composite won’t rot, splinter, or warp from constant water exposure. The textured cap provides slip resistance when wet. Chemical splash from pool and hot tub water won’t bleach or stain the surface like it does with wood decking.
Elevated & Second-Story Decks
Decks that are difficult to access from below for maintenance make composite’s no-stain advantage especially valuable. You’ll never need to crawl under an elevated deck to re-stain the underside or replace rotted boards at height.
HOA Neighborhoods
Many Boise-area HOAs (Eagle, Southeast Boise, Meridian subdivisions) require consistent exterior appearance. Composite maintains a uniform look year after year with no fading, peeling, or weather-worn variation that can trigger HOA maintenance notices.
The most common question we hear: “Is composite really worth the extra money?” This year-by-year comparison for a 320 sq ft deck (16′ × 20′) tells the full story. We're comparing mid-range composite (Trex Select at ~$42/sq ft) against pressure-treated lumber (~$20/sq ft) with biennial staining at $2.00/sq ft.
| Year | Wood (Cumulative) | Composite (Cumulative) | Difference |
|---|---|---|---|
| 0 (Install) | $6,400 | $13,440 | +$7,040 |
| 2 | $7,040 | $13,440 | +$6,400 |
| 4 | $7,680 | $13,440 | +$5,760 |
| 5 | $8,320 | $13,440 | +$5,120 |
| 6 | $8,960 | $13,440 | +$4,480 |
| 7 | $9,600 | $13,440 | +$3,840 |
| 8 | $10,240 | $13,440 | +$3,200 |
| 10 | $11,520 | $13,440 | +$1,920 |
The Bottom Line
Wood maintenance costs — staining, sealing, and board replacement — accumulate at approximately $640 every two years for a 320 sq ft deck. By year 10, the gap narrows to under $2,000, and that's before accounting for the value of your time spent staining (8–12 hours per cycle) and potential board replacements for warped, cracked, or rotted lumber. By year 12–14, most pressure-treated decks need their first round of board replacements ($3–$5/sq ft), at which point composite is the clear financial winner. Add in the resale value premium that composite decks command in the Boise real estate market, and the ROI case becomes even stronger.
Common questions we hear from Boise homeowners considering composite decking.
How hot does composite decking get in Boise summers?
Dark-colored composite boards can reach 140–170°F on direct-sun afternoons when air temperatures exceed 100°F. Lighter colors stay 20–30°F cooler. If you plan to use your deck barefoot, choose a lighter shade such as Trex Foggy Wharf or TimberTech Coastline. Adding a pergola or shade sail over south- and west-facing sections also makes a significant difference.
How long does composite decking last in Boise?
Most capped composite decking products carry 25- to 50-year warranties and are engineered to withstand UV exposure, freeze-thaw cycling, and moisture. In Boise at 2,730 feet elevation, the UV index is higher than sea-level cities, but modern cap technology handles this well. Expect 25–30+ years of service life with virtually no maintenance beyond occasional cleaning.
Is composite decking worth the extra cost over pressure-treated wood?
Yes, for most Boise homeowners. While composite costs roughly double the upfront price of pressure-treated lumber, you eliminate annual staining, sealing, and sanding costs that run $1.50–$3.00 per square foot every 2–3 years. Over a 10-year period, composite and wood reach near cost parity. The convenience factor alone drives most of our clients toward composite.
Can composite decking be installed over an existing deck frame?
In many cases, yes. If the existing substructure is structurally sound and meets current code, we can remove old wood deck boards and install composite boards on the existing frame. We inspect joist spacing, check for rot or insect damage, and verify ledger board attachment before recommending an overlay. This can save 20–30% compared to a full tear-down and rebuild.
Do I need to seal or stain composite decking?
No. Capped composite decking from Trex, TimberTech, and Fiberon requires zero staining, sealing, or painting. The protective polymer cap resists moisture, UV damage, stains, and mold. The only maintenance required is periodic cleaning with soap and water or a composite deck cleaner. We recommend cleaning twice a year in Boise — once after pollen season in spring and once after fall leaf drop.
Composite isn't the only option. Compare it against these alternatives to make the best choice for your Boise home.
Planning a deck project involves more than choosing a material. Explore our other guides and services.
Deck Builder Service
Full deck building service overview
Deck Cost Guide
Detailed pricing for Boise deck projects
Deck Materials Comparison
Side-by-side material comparison guide
Deck Building Timeline
Phase-by-phase scheduling breakdown
Deck Permits in Boise
Ada County permit requirements & process
Deck Design Ideas
Layouts, features, and style inspiration
The following government agencies, industry organizations, and official resources provide additional information relevant to your remodeling project.
Ready for a Composite Deck?
Get a free, no-obligation estimate for Trex, TimberTech, or Fiberon composite decking on your Boise home. Licensed, insured, and backed by manufacturer-certified installation.