Pick the wrong wood and your pergola gray-rots at the post bases within a few seasons, no matter how clean the joinery is. For most backyards, western red cedar is the best wood for a pergola. It naturally resists rot, decay, and insects thanks to built-in oils, it stays light enough to cut and fasten with basic tools, and it costs far less than the tropical hardwoods that beat it on paper. Redwood is the premium step up; pressure-treated pine is the budget workhorse.
TL;DR: Western red cedar is the best all-around pergola wood: naturally rot- and insect-resistant, easy to work, and moderately priced. Redwood looks and lasts a touch better but costs more and is harder to source. Pressure-treated pine wins on price but needs re-sealing every 1 to 2 years.
The best wood for an outdoor pergola is western red cedar. This durable softwood naturally resists rot, decay, insects, and moisture because of the oils baked into its grain, so it holds up outdoors with very little babying.
Cedar is not the only good answer, though. Depending on your climate, design, and budget, redwood or a tropical hardwood might fit better. The trick is matching the wood’s real strengths to your project instead of chasing the most expensive option on the shelf. Western red cedar wins for most homeowners because nothing else hits the same blend of toughness, looks, easy handling, and price. If you want a head start, our cedar pergola kits ship in cedar already milled and ready to assemble.
Five woods cover almost every backyard pergola, and each earns its spot for a different reason. Here is how they stack up.
Cedar is the default for good reason. Its natural oils fend off moisture, decay, insects, and rot, so it thrives outdoors with little upkeep. It starts warm reddish-brown and weathers to a silvery patina, and its straight, even grain looks clean stained or bare. Because it is soft and lightweight, it cuts, shapes, and fastens easily with both power and hand tools. It is grown sustainably across North America, so you can find it in several grades and price points.
Redwood is the premium domestic softwood. Its tannins and oils resist moisture, insects, and fungi, and many builders rate its looks a notch above cedar, with the same warm-to-silvery aging. It works just as easily under the saw. The catch is supply: redwood is grown sustainably but in limited quantities in California and Oregon, so it costs more and can be hard to source outside the West.
Pressure-treated pine is the budget durability play. It starts as cheap, ubiquitous pine or fir, then gets treated under pressure with preservatives that resist rot, moisture, and insects. It is sold everywhere and comes in every size you need. The trade-off is upkeep: plan to re-seal or re-stain it every 1 to 2 years to keep it looking right and lasting long, and our guide on how to stain a pergola covers the timing and steps.
Exotic hardwoods like ipe, tigerwood, and teak are the most rot- and insect-resistant woods you can buy, which makes them ideal for wet, humid climates. They bring rich colors and grain you will not find in domestic lumber, and their natural oils mean minimal maintenance. The downsides: they are expensive imports, and they are so dense that cutting and fastening usually demands carbide blades and real experience.
Plain pine is the cheapest, most available option, and it saws and fastens with almost no effort. But it has no natural rot resistance, so it warps, twists, cracks, and rots fast unless it is heavily sealed or treated. Save untreated pine for sheltered components or kits where the lumber is already treated for exterior use.
The table below sums up how the five woods compare on the factors that matter for an outdoor build, from how long they last to how often you will be out there with a brush.
| Wood Type | Durability | Weather Resistance | Appearance | Maintenance | Cost |
|---|---|---|---|---|---|
| Western Red Cedar | Excellent | Excellent | Good | Very Low | Moderate |
| Redwood | Excellent | Excellent | Excellent | Low | High |
| Pressure-Treated Pine | Good | Good | Fair | Medium (re-seal every 1 to 2 yrs) | Low |
| Tropical Hardwood | Excellent | Excellent | Excellent | Low | Very High |
| Pine (untreated) | Poor | Poor | Good | High | Low |
Those durability ratings are not just our opinion. The USDA Forest Products Laboratory rates the heartwood of both cedar and redwood as resistant to very resistant to decay, while the Wood Database corroborates that untreated pine sits in the non-durable range, which is exactly why it leans on chemical treatment outdoors.
So across every option, western red cedar stands out as the ideal choice for most homeowners. Its blend of natural sturdiness, beauty, availability, fair pricing, and easy handling makes it the best all-around wood for DIYers and pros alike. Whichever wood you land on, sealing or staining it after assembly buys years of extra life.
Start with your climate, because it rules out more options than anything else. Tropical hardwoods excel in wet, humid areas, while cedar and redwood handle dry and mixed climates beautifully. If your wood gets soaked by rain and dries out over and over, lean toward species rated for high decay resistance, since that cycle is what splits, cups, and rots cheaper lumber first.
Then weigh your budget against how much maintenance you actually want to do. Cedar and redwood reward you with low upkeep but cost more upfront; pressure-treated pine flips that, cheap to buy but committing you to re-sealing every 1 to 2 years. Be honest about whether you will keep up with it.
Factor in your skills and the size of the build too. Softwoods like cedar and pine are beginner-friendly with common tools, while dense tropical woods demand specialty saws and patience. Larger pergolas with long overhead spans need stiffer lumber that will not sag, so cedar and redwood cover most home sizes while very large structures may call for denser wood.
Finally, check your HOA rules before you buy. Many neighborhoods restrict pergola materials, colors, or even allowed wood species, and historic districts can be especially strict. A two-minute look at the bylaws beats tearing down a finished structure. If you want the full planning picture from footing to finish, our complete pergola buying guide ties wood choice into sizing, style, and installation.
Yes, and it is the most popular choice for good reason. Western red cedar cuts and shapes easily with standard power and hand tools, and you fasten the pieces with screws or nails. Follow a set of plans or hire a contractor, and the wood’s natural rot resistance does the rest with minimal upkeep.
Modified wood is lumber treated with heat or chemicals to boost its resistance to rot and moisture. It can work well for a pergola, since the goal is the same outdoor durability you get from cedar. Just check the manufacturer’s recommendations to confirm the specific product is rated for exterior structural use.
Stain or paint it to seal out the elements, then clean and inspect it once or twice a year to catch any damage or decay early. Cedar and redwood need very little beyond that. Pressure-treated pine needs re-sealing or re-staining every 1 to 2 years to keep its protection and looks intact.
Use galvanized, stainless steel, or coated decking nails or screws so they resist rust outdoors. Stainless steel is the safest bet with cedar and redwood, whose natural acids can corrode cheaper fasteners and leave dark streaks. Match the fastener to your lumber type, and your joints will outlast the finish.
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