Best Wood for Exterior Trim: Cedar vs Redwood vs Pine vs PVC

Western red cedar and old-growth bald cypress are the best woods for exterior trim: the Wood Database rates both durable to very durable against decay, while eastern white pine rates only moderate to low. Painted pine still works if every cut end is sealed. PVC and fiber cement skip rot entirely. This guide compares all of them by decay rating, hardness and drawbacks, then covers installation and repainting.

Exterior Trim Wood: Quick Comparison

Choosing exterior trim comes down to climate, budget and how much upkeep you will accept. The table below puts the common options side by side, using published decay ratings and Janka hardness for the woods and maker information for the manufactured boards.

Material	Decay resistance	Janka hardness	Main drawback	Best for
Western red cedar	Durable to very durable	350 lbf	Dents easily; iron nails stain it	Stained or painted trim, most climates
Redwood	Moderately durable to very durable (old-growth rates higher)	450 lbf average	Second-growth boards rate lower than old-growth	Natural-finish trim where you can source good heartwood
Bald cypress	Durable to very durable in old-growth; only moderately durable in younger wood	510 lbf	Rating drops for younger trees	Wet, humid regions
Eastern white pine	Moderate to low	380 lbf	Rots early unless every cut end is sealed and painted	Painted trim on a tight budget
Cellular PVC	No wood to rot (maker claim)	Not applicable	Moves with temperature; paint color limits on some lines	Low-maintenance painted trim, areas near the ground
Fiber cement	Resists moisture damage and termites (maker claim)	Not applicable	Heavier, and cutting it makes fine dust	Fire-prone or termite-heavy areas

Two details change how to read the wood ratings. They describe heartwood, not the pale sapwood, and they depend on tree age: the Wood Database says old-growth redwood and old-growth bald cypress outperform younger, second-growth boards. A board labeled cedar or redwood is not automatically rot-proof.

Different Types Of Wood For Exterior Trim

Each trim material fails in its own way, so the right pick depends on where the board sits on the house. Here is how each one behaves outdoors.

Cedar

Western red cedar earns its reputation from natural extractives in the heartwood that slow decay. The Wood Database rates it durable to very durable against rot but only mixed against insects, so it is not a bug-proof board. It is also very soft: at 350 lbf Janka it dents and scratches easily, and the same source warns that iron-based fasteners can stain it, especially in damp conditions. For a deeper look at how long it lasts outside, see our guide to whether cedar rots.

• Rated durable to very durable against decay, mixed against insect attack
• Easy to cut and finish, but soft enough to dent during installation
• Use stainless steel fasteners to avoid the black streaks iron nails leave

📊 Western red cedar: 350 lbf Janka hardness, durable to very durable decay resistance, mixed insect resistance. Source: Wood Database, Western Red Cedar

Redwood

Coast redwood is moderately durable to very durable depending on the board, and the old-growth versus second-growth split matters more here than with any other wood. The Wood Database lists average Janka at 450 lbf, with old-growth at 480 and second-growth at 420. That is a small difference in hardness, but the decay rating gap is the real reason to ask your supplier which you are buying.

• Heartwood runs light pinkish brown to deep reddish brown; sapwood is pale and less durable
• Old-growth stock is denser and rates higher than second-growth
• A natural finish needs regular maintenance to hold its color

Bald Cypress

Bald cypress is a strong choice in wet, humid regions. The Wood Database rates old-growth bald cypress durable to very durable, while wood from younger trees is only moderately durable, and it measures 510 lbf Janka, a little harder than cedar. As with redwood, the rating you read online assumes the best material, so ask whether the boards are old-growth before paying a premium.

Primed Pine

Eastern white pine is easy to work and finishes well at 380 lbf Janka, but the Wood Database rates its heartwood only moderate to low in decay resistance. That means the paint film and sealed cut ends are doing the protecting, not the wood. Our guide to using painted pine outdoors covers the end-grain details that decide whether it lasts.

Not all primed pine is the same, which is a gap most comparisons skip. Standard primed finger-jointed pine relies entirely on the coating. WindsorONE, for example, sells finger-jointed pine trim infused through the core with a rot treatment, with a three-coat factory primer and a 30-year limited warranty against rot, insects and mold. That is a different product from a bare primed board, so compare warranties, not just the word “primed.”

Prime all cuts, even butt joints and miters, unless using exterior grade glue.

Pvc Trim Boards

Cellular PVC trim contains no wood, so there is nothing to rot, swell or feed insects. The trade-off is movement: AZEK, a major maker, calls for about 1/8 inch of gap per 18 feet of board when installed in cool weather, glued joints, and scarf joints on long runs such as fascia. Paint choice matters too. AZEK says its Classic Trim should be painted only with 100% acrylic latex paint of LRV 55 or higher, which rules out many dark colors, while its PaintPro line is sold as engineered to be painted.

• No wood to rot, so it suits damp spots and areas near the ground
• Cuts and fastens with standard woodworking tools
• Joints should be glued and gapped for thermal movement, then sealed with acrylic or urethane caulk, not silicone

Factors To Consider When Choosing Wood For Exterior Trim

Climate, exposure and upkeep decide the winner more than species name does.

Durability

Durability is more than a species label. The decay ratings above come from heartwood tests, so sapwood, young second-growth boards and any board with exposed end grain will do worse than the headline number. Even cedar will decay where water gets trapped behind it, which is why the details in the installation section matter as much as the wood you pick.

Maintenance

Painted pine and fir need the most upkeep: you repaint when the coating starts to crack or chalk, and you re-caulk joints before gaps open. Cedar, redwood and cypress stay stable longer between coats but still need a finish if you want their color. PVC needs only occasional washing with soap and water. Fiber cement needs repainting only when a field-applied finish wears; a factory finish such as James Hardie ColorPlus is baked on.

Cost

Cost is the purchase price plus the labor of every repaint. Primed pine is usually the cheapest at the register, cedar and redwood cost more, and PVC and fiber cement usually cost more again. But a cheap board you repaint on a short cycle, with ladder work and caulk each time, can end up costing more over the years.

Pick By Situation

• Damp, low or ground-adjacent trim (corner board bases, door jambs, garage trim): PVC or fiber cement, or old-growth cypress or redwood
• Painted, high-visibility trim on a budget: primed pine with every cut end sealed, or a treated-core primed pine with a long warranty
• Natural or stained look: western red cedar, with stainless steel fasteners
• Fire-prone or termite-heavy areas: fiber cement, which the maker lists as noncombustible

Preparing And Installing Exterior Trim

Wood Treatment And Protection

Prime all faces and every cut end before the board goes up, including miters and butt joints. End grain absorbs water far faster than the face of a board, so a freshly cut, unprimed end is the weak point on any painted wood trim. Follow with two coats of a paint made for exterior wood. For help picking a coating, see our comparison of wood primers.

Proper Installation Techniques

1. Choose the material for the spot: cedar, cypress, PVC or fiber cement where the trim stays wet, painted pine only where it stays drier.
2. Prime every cut end before installing, even miters and butt joints.
3. Use stainless steel fasteners on cedar, because iron-based fasteners can stain it in damp conditions.
4. Leave a small gap where trim meets masonry or siding, and keep the bottom edge off the roofline and horizontal surfaces so water drains instead of wicking up.
5. Caulk the joints with a paintable exterior caulk. On PVC, use acrylic or urethane caulk, not silicone, and glue the joints.

Maintaining Exterior Wood Trim

Regular Inspection

Walk the house and look at the trim joints, the bottom ends of vertical boards, and anything under a roof edge or gutter. Look for cracked caulk, paint that is lifting or bubbling, dark staining at nail heads, and soft spots. Press a screwdriver tip into any suspect area: if it sinks in easily, the wood is already decaying and needs repair, not repainting.

If you find rot, our guide to replacing rotted exterior wood walks through cutting it out and replacing trim, fascia and siding.

Refinishing And Repainting

Repaint when the coating cracks, chalks or peels, not on a fixed calendar, because exposure varies a lot by side of the house. Scrape loose paint, sand the edges smooth, spot-prime bare wood, caulk the open joints, then topcoat. Picking a finish matters as well: our guide to exterior paint finishes for wood explains which sheen holds up best.

Maintaining Exterior Wood Trim In Summary

1. Inspect the trim twice a year, focusing on joints, cut ends and bottom edges.
2. Probe suspect spots with a screwdriver to find soft wood early.
3. Scrape and sand loose paint before recoating.
4. Spot-prime bare wood, then re-caulk open joints.
5. Repaint with an exterior-grade paint when the coating cracks or chalks.

Alternatives To Wood Trim For Exterior Use

If rot is your main worry, the alternatives to wood trim are PVC (covered above), fiber cement and exterior-rated engineered wood. Each trades the look of real wood for lower maintenance.

Engineered Wood

Exterior-rated engineered wood trim is made of wood fibers or strands bonded with resin and treated for outdoor use, then sold factory-primed. It still needs its cut ends sealed to the maker’s instructions. Do not confuse it with ordinary interior MDF: standard MDF swells badly when it gets wet, which is covered in our guide to using MDF for exterior trim.

Fiber Cement

Fiber cement trim is a cement-and-cellulose board. James Hardie sells it as HardieTrim with a 30-year non-prorated, transferable limited substrate warranty, describes the board as noncombustible and moisture resistant, and says it holds no appeal to woodpeckers or termites. It is available with a factory-applied ColorPlus finish. Bare or primed fiber cement still needs the right coating: see whether Hardie board needs priming.

Cutting fiber cement makes fine dust that contains silica, so use the dust-control methods and respirator the maker specifies, and cut outdoors where possible.

Frequently Asked Questions For What Type Of Wood To Use For Exterior Trim

What is the best material for exterior trim board?

For natural wood, western red cedar is the best all-round choice: the Wood Database rates it durable to very durable against decay. For the least upkeep, cellular PVC or fiber cement beat any wood because there is no wood to rot. Primed pine is the budget option, but only if every cut end is sealed.

Can I use pressure treated wood for exterior trim?

You can, but it is rarely the best fit. Pressure-treated lumber resists decay and insects, but it is often sold wet, so it can twist and shrink as it dries and may need time before it takes paint. It is better suited to ground contact and structural parts than to visible trim.

Is it OK to use pine for exterior trim?

Yes, if it is painted and sealed. The Wood Database rates eastern white pine heartwood as moderate to low in decay resistance, so the paint film and sealed cut ends do all the work. Prime every cut end, caulk the joints, and repaint before the coating cracks or chalks.

What is the cheapest wood for exterior trim?

Factory-primed pine is usually the cheapest wood option at big-box stores. It costs less to buy but more to maintain than cedar, so price it over the life of the paint job, not just at the register.

What is the best wood for exterior window trim?

Window trim sits where water collects, so choose cedar, old-growth redwood or bald cypress if you want real wood, or PVC if you want to stop thinking about rot. If you paint pine window trim, seal the cut ends and the bottom edge of the sill-side pieces first.

Is cedar or PVC better for exterior trim?

Cedar looks like real wood and takes stain, but it needs finish upkeep and it dents easily at 350 lbf Janka. PVC needs no rot protection and holds up in damp spots, but it expands and contracts with temperature, so joints need the gaps and glue the maker specifies.

What wood should I use for shed trim?

Use the same logic as a house, but with lower stakes: primed pine is a reasonable budget pick for a painted shed if the cut ends are sealed. Use cedar, or PVC at the base of corner boards and door jambs, where the trim sits closest to splashing water.

Conclusion

For real wood, western red cedar and old-growth bald cypress or redwood are the safest picks, while primed pine only makes sense if you seal every cut end and are willing to repaint on time. PVC and fiber cement cost more at the register but remove the rot question. Whatever you choose, priming the cut ends and keeping water from sitting on joints does more to prevent early failure than any species swap.