Cedar vs Composite Fence: The True 10-Year Cost Compared
Two fence quotes are sitting on the kitchen counter. One says cedar, the other says composite, and the composite number is almost double. The natural reaction is to go with cedar — it's cheaper, it looks like a real fence, and the neighbor's cedar fence looks fine after five years. But that neighbor has been staining it every other summer. And the boards on the north side, the ones that never dry out between Portland's October-to-May rain cycles, are already starting to warp.
The real cost of a fence isn't what goes on the invoice the day it gets built. It's what the fence costs over the next decade — materials, labor, stain, replacement boards, and time spent dealing with it. That's where the comparison gets interesting.
Side-by-Side: Cedar vs Composite Specs
| Feature | Western Red Cedar | Composite (Trex/SimTek) |
|---|---|---|
| Installed cost per LF | $30-55 | $45-80 |
| Lifespan | 15-20 years (maintained) | 25-30+ years |
| Maintenance | Stain/seal every 2-3 years | Hose off once a year |
| Rot resistance | Moderate (natural oils) | High (no organic material) |
| Warping risk | High in sustained moisture | Low |
| Color retention | Fades to gray without stain | Fades slightly over 10+ years |
| Wind resistance | Good when maintained | Good (some brands rated 110+ mph) |
| Repair ease | Easy — individual boards | Harder — panel systems |
| Environmental | Renewable, biodegradable | Recycled plastic/wood fiber |
Two contractors stand in front of a home, representing long-term planning decisions like choosing between cedar and composite fencing based on durability, maintenance, and true 10-year ownership costs.
Durability in Portland's Climate
Cedar has natural oils that resist rot and insects. That's true in dry climates. In Portland, where the fence sits in 40+ inches of rain per year and barely dries out between November and April, those oils deplete faster. The wood absorbs moisture, swells, and the grain starts lifting. North-facing fence sections stay damp for weeks at a time. That's where rot starts — not on the sunny side facing the street, but on the back side nobody checks.
Staining helps. A good penetrating stain every two to three years slows the moisture absorption and extends the life. Skip the stain and cedar in Portland starts showing real wear by year five. Posts rot at the base where they meet soil or concrete. Pickets cup and twist. The fence starts looking tired.
Composite doesn't absorb water. It doesn't rot, warp, or need staining. Rain hits it and runs off. Moss grows on the surface in shaded areas — same as any material in Portland — but a pressure washer handles that in an afternoon. The boards themselves don't deteriorate the way wood does.
The 10-Year Cost Breakdown
Cedar — 10-year total: - Installation: $6,000 (at $40/LF mid-range) - Staining every 2.5 years (4 rounds): $900-1,350 ($1.50-2.25/LF each) - Board replacements (posts, warped pickets): $400-800 - Total: $7,300-$8,150
Composite — 10-year total: - Installation: $9,750 (at $65/LF mid-range) - Maintenance (annual wash): $0-150 - Board replacements: $0 (unlikely in first 10 years) - Total: $9,750-$9,900
Cedar still costs less over 10 years. But the gap is $1,600-$2,600, not the $3,750 it appeared on installation day. And that gap keeps shrinking every year, past year 10, as cedar needs more repairs and composite keeps standing.
When Cedar Makes More Sense
Cedar wins in specific situations. If the property is being sold within five years, cedar's lower upfront cost makes financial sense — the next owner inherits the maintenance. If the fence line is short (under 60 linear feet), the 10-year savings from composite don't add up to enough to justify the premium. And if the look matters — a natural wood fence next to a Craftsman bungalow or a mid-century ranch — cedar fits the house better than composite does.
Cedar is also easier to repair. One board splits, one post rots — pull it and replace it. A single board costs $3-8. Composite panel systems can require replacing entire sections, and matching the exact color after a few years of weathering is difficult.
When Composite Makes More Sense
Composite wins when nobody wants to think about the fence again. The back fence along a property line, the side yard fence that gets zero sun, the sections that face north and stay damp all winter — composite handles those conditions without maintenance. For homeowners staying in the house long-term, composite's higher upfront cost gets absorbed by zero staining, zero board replacements, and a fence that still looks the same at year 15.
Composite also wins in HOA neighborhoods where fence appearance standards apply. Cedar without stain turns gray. HOAs don't like gray. That means mandatory staining on a schedule, and missing a cycle can mean a citation. Composite avoids that problem entirely.
Installation Considerations
Both materials need the same post spacing — typically 6 to 8 feet on center. Both need concrete footings. The labor difference is minor. Composite panels are heavier and less forgiving if the post spacing is off, so precision matters more during layout.
One thing that trips people up: composite fence systems are proprietary. Trex fencing uses Trex posts, Trex brackets, Trex pickets. Mixing brands doesn't work. That locks in a single manufacturer for any future repairs or additions. Cedar is cedar — any lumber yard carries it, any fence builder works with it.
Lead time matters too. Cedar is available locally and installs within a week or two of signing. Composite fence materials often ship from the manufacturer and can take 3-6 weeks to arrive. Plan ahead if going composite.
Frequently Asked Questions
The Bottom Line on 10-Year Cost
Cedar costs less to build. Composite costs less to own. The decision depends on how long the fence needs to last, how much maintenance time is realistic, and which sections of the yard take the worst of Portland's weather. North-facing, shaded, high-moisture sections favor composite every time. Sunny, visible, style-important sections — cedar still earns its place.