If you’re considering adding a wooden fence to your property—or wondering how much life your current one has left—you’re not alone. One of the most common questions we hear from homeowners in Seattle and Portland is: how long will a wood fence last? The answer depends on several factors, from the type of lumber used to how it’s installed and maintained. But with the right fence materials and proper care, a wood fence can provide security, privacy, and curb appeal for decades.
This guide breaks it all down, so you’ll know what to expect, what to look out for, and how to get the most longevity out of your investment.
Lifespan of a Wood Fence: The Quick Breakdown
Here’s a snapshot of how long different types of wooden fences typically last—assuming good maintenance and professional installation.
Wood Type | Average Lifespan |
|---|---|
Cedar | 15–30 years |
Pressure-Treated Pine | 10–20 years |
Redwood | 20–25 years |
Exotic Hardwoods (Ipe, Cumaru) | 50–75 years |
Each type of wood brings its own pros and cons. What you choose will depend on your budget, aesthetic preferences, and how much time you’re willing to invest in upkeep. And remember—these lifespans assume proper care, including sealing, cleaning, and occasional repairs.
What Impacts the Life Expectancy of a Wooden Fence?
Climate and Environmental Conditions
In the Pacific Northwest, our wet climate can be tough on wood. Moisture leads to rot, mildew, and mold, especially if fences aren’t sealed regularly. The constant rain also contributes to moss buildup, which holds in moisture and causes boards to decay faster. On top of that, the freeze-thaw cycles in winter can cause expansion and contraction in your fence panels, leading to warping and cracking over time.
All of this means that fences in Seattle and Portland need more maintenance than in drier climates. But don’t worry—with the right material and routine upkeep, your wooden fence can still last 20 years or more.
The Importance of Fence Posts and Post Holes
Your fence is only as strong as its base. Fence posts are the structural backbone of any wood fence, and if they’re not properly set in the ground, the whole thing can start to sag or lean in just a few years. Installing posts in concrete-filled post holes helps prevent shifting and water damage. At Cool Cat Fence, we go the extra mile by ensuring every post is set for maximum drainage and stability—especially important in our soggy soil.
Quality of Lumber and Fence Panels
The type and quality of lumber used in your fence has a huge effect on its life expectancy. Pressure treated wood is more affordable and resistant to pests, but it’s more prone to warping if not maintained. Cedar is a natural material that performs beautifully in our climate thanks to its built-in resistance to decay and bugs. Redwood is another excellent choice, offering a longer lifespan and rich color, though it comes at a higher cost.
Additionally, pre-assembled fence panels can make installation faster, but they must be well-constructed and properly secured. Flimsy or uneven panels can deteriorate quickly. At Cool Cat Fence, we never cut corners when it comes to sourcing and installing high-quality materials.
Fence Installation Matters: Why the Right Fence Crew Makes a Difference
Even the best wood won’t perform well if it’s poorly installed. Drainage, spacing, and hardware all play important roles in a fence’s durability. Common mistakes like burying untreated posts directly in soil, using low-grade lumber, or placing panels too close together can lead to early failure.
That’s why we treat fence installation like an art and a science. We use professional-grade treated wood, corrosion-resistant fasteners, and proven building techniques that hold up against the elements. Choosing the right fence contractor can literally add years to your fence’s life.
Annual Maintenance: A Must in the Pacific Northwest
If you want your wood fence to go the distance, annual maintenance is non-negotiable. Here’s what we recommend:
Clean your fence each year, especially after the rainy season. Use a mild soap and a soft brush to remove moss, mildew, and dirt.
Inspect for minor damage, like cracked boards, loose screws, or early signs of rot. Addressing small issues early can prevent major repairs later.
Stain or seal every 2–3 years to create a moisture barrier. You can also use outdoor-rated paint for added protection—just make sure the wood is dry and clean first.
Maintenance might feel like a chore, but it dramatically increases your fence’s lifespan. Think of it like an oil change for your car—it keeps everything running smoothly.
Cedar vs. Pine vs. Redwood: How Long Does a Wood Fence Last?
Cedar: The Ideal Natural Material for the PNW
Cedar is one of the best woods for fences in the Pacific Northwest. Its natural oils repel moisture and insects, and it holds up beautifully in our rainy climate. With regular sealing and maintenance, a cedar fence can last up to 30 years. Even without stain, it weathers gracefully into a silver-gray color.
Pressure Treated Wood: Affordable and Durable with Proper Care
Pressure treated wood is a popular choice thanks to its lower price tag and pest resistance. Treated wood is infused with chemicals to help it resist rot and insect damage—especially useful against pests like carpenter ants, which are common in our region. While pressure-treated pine won’t last quite as long as cedar, it can still provide 10–20 years of service with regular maintenance.
Redwood: High-End Looks with Strong Performance
Redwood has a beautiful color and natural durability similar to cedar, but it’s less commonly used in the Pacific Northwest due to its higher cost and sourcing challenges. Still, for homeowners who want a premium look and long lifespan, redwood is worth considering.
Exotic Hardwoods: The Longest-Lasting Option
If longevity is your top priority, tropical hardwoods like Ipe and Cumaru are unbeatable. These dense woods are incredibly resistant to rot, insects, and warping. They’re also more expensive and harder to work with, but the payoff is a fence that can last 50+ years.
How to Extend the Life of Your Fence
There are several smart strategies that can help extend the life of your wooden fence:
Keep your fence off the ground. Make sure the bottom of the fence isn’t in direct contact with soil to avoid moisture absorption.
Use metal post anchors or concrete footings to reduce wood rot at the base.
Ensure proper drainage around the fence line to prevent pooling water.
Trim vegetation around your fence to allow airflow and reduce moss or mildew buildup.
Avoid overwatering nearby landscaping, which can shorten your fence’s lifespan.
Every small step adds up when it comes to durability and security.
Signs It’s Time for a New Fence
Even the most well-maintained fences don’t last forever. Watch for these signs that it might be time for a replacement:
Large areas of rot or mold
Fence leaning or sagging in multiple places
Boards pulling away from posts
Extensive insect damage (especially from carpenter ants or termites)
Frequent repairs that no longer seem to hold
If your fence is 15–25 years old and showing several of these symptoms, investing in a new fence may be more cost-effective than continued patchwork.
Repair vs. Replace: What’s the Right Call?
Not sure whether you need a few repairs or a full replacement? Here’s a quick breakdown:
Repair when you have isolated damage, like a couple of cracked boards, loose fence panels, or a single leaning post.
Replace when structural integrity is compromised, rot is widespread, or maintenance costs are stacking up.
We’re always happy to provide a professional assessment to help you choose the right path. Learn more about our wood fence repair and replacement services.
Exploring Other Fencing Options: Chain Link and Vinyl Fences
Wood is timeless, but it’s not the only option. If you’re looking for less maintenance or a different look, here are two popular alternatives:
Chain Link Fences
Chain link is one of the most cost-effective and durable fencing options out there. It’s low-maintenance, resistant to pests, and great for pet enclosures or securing large yards. You can also add privacy slats or colored coatings for a more customized look.
Vinyl Fences
Vinyl fences offer a clean, modern aesthetic with virtually no maintenance. They don’t rot, peel, or warp, and they hold up well in the Pacific Northwest. They’re a great option if you want the look of wood without the upkeep.
Need help deciding which material fits your lifestyle? Check out our fencing options comparison guide.
FAQs About the Lifespan of a Wooden Fence
How long does a wooden fence last in wet climates like Seattle?
With proper installation and care, a cedar wooden fence can last 20–30 years in the Pacific Northwest. Pressure treated wood tends to last closer to 10–20 years, depending on upkeep.
What’s the best way to maintain a wood fence?
Annual cleaning, regular inspections, and sealing or painting every few years will significantly extend your fence’s life. Address minor damage early to avoid major repairs later.
Can carpenter ants destroy my wood fence?
Yes. Compared to how termites eat wood, carpenter ants are not as aggressive, but they tunnel through it to nest. They’re especially drawn to damp, untreated wood. Regular sealing and inspections help prevent infestations.
Is pressure treated wood safe for families and pets?
Yes. Today’s treated wood is regulated for safety and commonly used in residential fencing. Still, it’s always a good idea to wash hands after contact and avoid burning treated lumber.
Final Thoughts: Choosing the Right Fence for Long-Term Value
So, how long does a wood fence last? The answer depends on the type of wood, the climate, how it’s installed, and how well it’s maintained. With a little attention and the right fence partner, your wooden fence can serve your home beautifully for decades—providing security, style, and long-term value.
At Cool Cat Fence, we build fences that are made to last, using expert craftsmanship, quality lumber, and a team that truly cares. Whether you’re looking for a new fence, exploring different fencing options, or just want advice on keeping your current one in great shape—we’re here to help.
Ready to build a fence that stands the test of time? Contact us today for a free estimate.
