The word cedar can make a timber label sound straightforward, but these two woods are not interchangeable. Western red cedar and eastern red cedar come from different genera, grow in different parts of North America and behave differently in a workshop. Neither is a “true cedar” from the genus Cedrus. Western red cedar is Thuja plicata, while eastern red cedar is Juniperus virginiana, a juniper.
That botanical distinction helps explain why one is widely sold for cladding, shingles and outdoor joinery while the other is familiar from cedar chests, wardrobe linings and pencils. Choosing between these cedar wood species should begin with the project rather than the shared name.
Western red cedar and eastern red cedar at a glance
Western red cedar is native to the Pacific Northwest and can grow into a very large tree. Its size allows mills to produce long, wide and relatively clear boards. The wood is lightweight, easy to machine and valued where low weight, dimensional stability and natural durability matter.
Eastern red cedar grows across much of eastern and central North America. The trees are generally smaller and often produce narrower boards with more knots and irregular grain. The heartwood is famous for its strong cedar wood scent and red-purple colour, making it popular for smaller interior projects and aromatic storage.
Colour and appearance
Western red cedar has a quieter palette
Fresh western red cedar heartwood can range from pale amber and pinkish brown to deeper reddish brown, while the sapwood is much paler. Outdoors, unfinished boards gradually weather towards a silvery grey. The grain is usually straight and suits cladding, fencing and garden structures. Clear vertical-grain material is especially stable but costs more than knotty grades.
Eastern red cedar is more dramatic
Eastern red cedar often combines reddish or purplish heartwood with cream-white sapwood. Knots, colour changes and swirling grain create lively furniture panels, boxes and turned work. Exposure to light gradually mellows the purple tones towards red-brown, even beneath a clear finish.
Scent and insect resistance
The familiar “cedar chest” aroma usually comes from eastern red cedar. Oils in its heartwood produce a strong, sweet, pencil-like scent, which explains its use for wardrobe linings, blanket chests and drawers. The aroma weakens as surface oils evaporate and oxidise. Light sanding can temporarily refresh it.
Western red cedar also has a recognisable aroma, but it is generally softer and more resinous or spicy. It is selected mainly for weather performance, low weight and appearance rather than for scenting an enclosed space.
Aromatic wood is not a guaranteed replacement for pest control. Tight storage and clean textiles still matter. Wood dust and fragrance can also irritate some people, so use extraction and suitable respiratory protection when machining either species.
Cedar wood rot resistance
Both woods have naturally durable heartwood because they contain extractives that discourage decay organisms. However, rot resistant does not mean rot proof. Sapwood is less durable, and any timber can fail when water is trapped, end grain stays wet or the material is used in unsuitable ground contact.
Western red cedar has a long reputation for siding, shingles, fencing, pergolas and outdoor trim. Its low density means corrosion-resistant fixings and sensible joint design matter. Stainless steel or suitable hot-dipped galvanised fasteners also help prevent dark staining.
Eastern red cedar heartwood is also durable and has traditionally been used for fence posts. Yet its smaller log size, knots and limited board widths make it less convenient for broad cladding or long architectural components. It is often chosen where smaller sections, rustic character or local availability suit the job.
Workability and movement
Western red cedar is light and easy to shape
Western red cedar cuts, planes and sands easily, although its softness means edges can bruise and surfaces can dent. Sharp cutters reduce torn grain. It has relatively low shrinkage and good dimensional stability, useful for boards exposed to seasonal humidity changes.
Eastern red cedar is denser and more variable
Eastern red cedar is still a softwood, but it generally feels harder and heavier than western red cedar. It machines well with sharp tools, though knots and grain reversals can cause tear-out. Its aromatic dust can be irritating, so dust collection is worthwhile.
Which cedar suits which project?
Choose western red cedar when you need long exterior boards, lightweight components or predictable stock for siding, screening, garden structures and shingles. Choose eastern red cedar for chests, linings, boxes, small furniture, turning and decorative work where scent and colour are part of the appeal.
Consider a homeowner building both a garden privacy screen and a lined blanket chest. Western red cedar is the more efficient screen material because long boards are readily available and easy to handle outdoors. Eastern red cedar is the natural chest lining because its aroma and contrasting colour add value inside an enclosed space.
Inspect the actual boards before buying. A species name does not reveal grade, moisture content, sapwood percentage, knots or checks. For furniture, arrange several boards side by side because colour variation can be considerable.
Finishing and maintenance
Western red cedar can be left unfinished to weather grey or coated with a penetrating exterior finish to retain more colour. End grain, cut edges and horizontal surfaces need particular attention. Preparation and maintenance should follow the coating manufacturer’s instructions.
Eastern red cedar used inside a wardrobe or chest is often left unfinished so the scent remains noticeable. Exterior eastern red cedar can also be coated, but test the finish first because its oils and colour can affect the result.
Related reading opportunities include identifying softwood species, choosing timber for exterior cladding and understanding heartwood versus sapwood.
Frequently asked questions
Are western and eastern red cedar the same species?
No. Western red cedar is Thuja plicata, while eastern red cedar is Juniperus virginiana. Both belong to the cypress family, but eastern red cedar is botanically a juniper.
Which cedar smells stronger?
Eastern red cedar normally has the stronger, sweeter aroma associated with cedar chests and pencils. Western red cedar has a milder, distinct scent.
Which is better outdoors?
Both have durable heartwood, but western red cedar is usually more practical for large exterior surfaces because it is widely available in long, broad boards. Design, grade and moisture management remain equally important.
Can either cedar be used structurally?
Some graded western red cedar products have structural uses, but not every cedar board is structural timber. Loads, spans, local codes and grade stamps must be checked. Eastern red cedar is more common in posts and specialty work than standard framing.
Buy the species that matches the job
The shared “red cedar” label hides two noticeably different materials. Western red cedar offers lightweight, stable boards suited to broad exterior work. Eastern red cedar brings stronger fragrance, deeper colour and character to smaller interior pieces and traditional posts. Compare board dimensions, heartwood content, grade and exposure, and the right choice becomes much clearer than the name suggests.