Web Extra: Choosing Wood for Outdoor Projects
Comparative decay resistance of the heartwood of some common native species
Grit Staff
September/October 2008
For most outdoor projects, naturally rot-resistant wood is a good idea. Use this table to find the right decay-resistant species for your project.
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| Resistant or very resistant | Moderately resistant | Slightly or nonresistant |
Baldcypress (old growth)1
Catalpa
Cedars
Cherry, black
Chestnut
Cypress, Arizona
Junipers
Locust, black3
Mulberry, red3
Oak, bur
Oak, chestnut
Oak, Gambel
Oak, Oregon white
Oak, post
Oak, white
Osage-orange3
Redwood
Sassafras
Walnut, black
Yew, Pacific3 | Baldcypress (young growth)3
Douglas-fir
Honeylocust2
Larch, western
Oak, swamp chestnut
Pine, eastern white1
Pine, longleaf1
Pine, slash1
Tamarack | Alder
Ashes
Aspens
Basswood
Beech
Birches
Buckeye2
Butternut
Cottonwood
Elms
Hackberry
Hemlocks
Hickories
Magnolia
Maples
Oak (red and black species)2
Pines (most other species)2
Poplar
Spruces
Sweetgum2
Sycamore
Willows
Yellow-poplar |
1 The southern and eastern pines and baldcypress are now largely second-growth, with a large proportion of sapwood. Consequently, it is no longer practicable to obtain substatial quantities of heartwood lumber in these species for general building purposes.
2 These species, or certain species within the groups sown, are indicated to have higher decay resistance than most of the other woods in their respective categories.
3 These woods have exceptionally high decay resistance.
Source: Forest Products Laboratory, Forest Service, U.S. Department of Agriculture. Comparative Decay Resistance of Heartwood of Native Species. U.S. Forest Service Research Note, FPL-0153. January 1967. Available at: www.fpl.fs.fed.us/documnts/fplrn/fplrn153.pdf.