Cedar vs Pressure-Treated Fence Boards: Which Lasts Longer?

TL;DR: Pressure-treated pine fence boards cost roughly $2-$4 per linear foot and last 15-20 years with regular sealing, while cedar runs $4-$7 per linear foot and can last 20-30 years with far less upkeep. Cedar resists insects and rot naturally; pressure-treated wood relies on chemical treatment that fades over time and needs re-sealing every 2-3 years.

_Last reviewed: July 2026 · 7 min read_

You're standing in the lumber aisle trying to decide between two stacks of boards that look almost identical but price out differently, and nobody at the store gives you a straight answer. The choice matters more than it looks because a bad call here means replacing sections of fence in 8 years instead of 20.

Okoniq Property Hub helps you log which fence sections were built with which wood, when they were sealed, and when the next inspection is due, so replacement decisions aren't guesswork years later.

Which lasts longer, cedar or pressure-treated wood?

Cedar typically lasts 20-30 years, pressure-treated pine 15-20 years, assuming both get basic maintenance. Cedar's natural oils (thujaplicin, specifically) resist rot and repel insects without any chemical treatment, which is why old cedar fences in wet climates still hold up after two decades with minimal care.

Pressure-treated wood is usually southern yellow pine infused with chemical preservatives like alkaline copper quaternary (ACQ) under pressure, forcing the treatment deep into the fibers. This protects the wood from rot and termites, but the protection is concentrated near the surface and in the outer inch or so. Once boards are cut for a gate or post, the exposed end grain is untreated and rots faster than the rest of the board unless you seal it yourself. This is one reason fence posts near ground level fail before the rest of the structure, similar to how deck joists rot from the inside before anyone notices.

Climate matters too. In humid Southeast states, pressure-treated wood's chemical barrier does more work because insect pressure is higher. In drier Western and Mountain states, cedar's natural resistance is often enough on its own.

Is cedar worth the extra cost?

Yes, if you're keeping the property more than 10 years, because cedar's lower maintenance cost offsets the higher upfront price over time. Cedar runs $4 to $7 per linear foot installed versus $2 to $4 for pressure-treated pine, roughly 40-60% more at purchase.

But cedar needs sealing only every 3-5 years, while pressure-treated wood needs it every 2-3 years or the chemical treatment starts losing effectiveness against moisture. Over a 20-year span, a 150-foot fence line might need 6-8 sealing cycles in cedar versus 8-10 in pressure-treated pine, and each cycle runs $150-$400 in materials and labor if you're not doing it yourself.

Landlords managing rental properties often lean pressure-treated because the lower upfront cost matters more than long-term savings when a lease might end in 2-3 years anyway. Owner-occupants planning to stay put tend to come out ahead with cedar.

How do maintenance needs compare?

Cedar needs cleaning and resealing roughly every 3-5 years; pressure-treated pine needs it every 2-3 years and is more prone to warping if not sealed promptly. Both woods need to dry out completely before the first sealing, usually 60-90 days after installation, or the sealant traps moisture instead of blocking it.

Pressure-treated pine has a well-known problem with warping and cupping as it dries, especially in the first year. The chemical treatment adds moisture during manufacturing, and as that moisture evaporates unevenly, boards twist. Cedar dries more evenly because it wasn't pressure-injected with liquid, so warping is less common, though not impossible.

| Factor | Cedar | Pressure-Treated Pine | |---|---|---| | Cost per linear foot | $4-$7 | $2-$4 | | Typical lifespan | 20-30 years | 15-20 years | | Resealing interval | Every 3-5 years | Every 2-3 years | | Warping risk | Low | Moderate to high (first year) |

Which one holds up better against rot at the ground line?

Neither wood is rot-proof at the post base without extra steps, because that's where moisture sits longest against the wood. Fence posts set in concrete or soil are the first place both cedar and pressure-treated lumber fail, similar to how ledger boards on decks rot when water gets trapped against the house.

For pressure-treated posts, use ground-contact rated lumber (labeled ".40 retention" or higher) specifically, not the standard above-ground treated boards, which aren't rated for direct soil contact and will rot within 5-8 years if buried. Cedar posts should sit on a gravel base or post base bracket rather than direct soil contact, since even cedar's natural resistance has limits against constant standing moisture.

If your property already has drainage problems pooling water near fence lines, fix that first, because no wood species survives standing water for long. Check whether your yard's drainage needs attention before rainy season if you're noticing soggy ground near the fence line.

Should you consider a composite or vinyl alternative instead?

If long-term maintenance is the main concern, composite or vinyl fencing eliminates the sealing cycle entirely but costs 2-3 times more than cedar upfront, often $8-$15 per linear foot installed. For landlords managing multiple properties, the near-zero maintenance can be worth it over a 20+ year hold, but the higher initial cost makes it a harder sell for a single owner-occupied yard on a tighter budget. Most owners stick with wood because the price gap is significant and wood fences are easier to repair in sections rather than replace entirely, similar to patching siding rather than reworking the whole exterior.

FAQ

Does pressure-treated wood need to be painted or stained?

Yes, within 6-12 months of installation once the wood has fully dried, or it will gray and crack from UV exposure faster than cedar does naturally.

Can cedar and pressure-treated boards be mixed on the same fence?

Yes, many owners use pressure-treated posts for ground contact strength and cedar boards for the visible fence face, combining durability where it matters most with better looks and lower maintenance above ground.

How much does a typical 150-foot fence cost in each material?

Pressure-treated pine runs roughly $1,800-$3,500 installed for 150 feet, while cedar typically runs $3,500-$6,500 for the same length, depending on board style and local labor rates.

Why does pressure-treated wood have a greenish tint when new?

The tint comes from the copper-based preservative (ACQ) used in the pressure treatment process, and it fades to a natural gray within 6-12 months as the wood weathers.

Is cedar naturally resistant to termites?

Yes, cedar's natural oils repel most wood-boring insects including termites, though it's not fully immune in areas with heavy termite pressure, and a soil treatment barrier is still recommended near the post line.

This is educational information, not construction or engineering advice. Consult a licensed fencing contractor or your local building department about post depth, treatment ratings, and permit requirements before starting a fence project.