American elm

Overview

American elm is a ring-porous hardwood with reddish-brown heartwood and a well-defined pale sapwood. Its interlocked grain makes it very resistant to splitting, which suits parts that take hard knocks. Today the species is scarce: Dutch elm disease killed vast numbers of mature trees, so most lumber comes from smaller or salvaged logs.

Pros

• Interlocked grain: Wood Database says it is very resistant to splitting.
• Holds nails and screws well, and responds well to steam bending.
• Glues, stains and finishes well.
• Moderate density (about 560 kg/m3), with a coarse, rustic texture and a well-defined sapwood and heartwood contrast.

Cons

• Interlocked grain makes it a challenge to machine, especially on quartersawn surfaces; planing can cause tear-out or a fuzzy surface.
• Wood Database rates dimensional stability as poor: 4.2% radial and 9.5% tangential shrinkage (tangential to radial ratio 2.3).
• Rated non-durable and susceptible to insect attack; not for outdoors.
• Limited supply: Wood Database says availability from mature trees has been greatly diminished by Dutch elm disease.

Variants and subspecies

• American (white) elm (Ulmus americana): 830 lbf and 560 kg/m3.
• Red or slippery elm (Ulmus rubra) is the other eastern elm and is often sold alongside it. CR Muterspaw and Kreis Sawmill list "red elm".
• Rock elm (Ulmus thomasii) is harder and heavier (1,320 lbf) and is covered separately in Rock elm.
• Wood Database groups all of these as non-durable, interlocked, and prone to Dutch elm disease, and lists other elms (cedar, winged, wych and English elm) as related.
• Salvaged or spalted elm from disease-killed urban trees is sometimes sold as live-edge slabs.

Working and finishing

Wood Database says planing can cause tear-out or a fuzzy surface; use a sharp, high-angle cutter or a scraper, and take light passes. It holds nails and screws well, and glues and steam-bends well. Because stability is poor, acclimatise wide boards before cutting joints.

Staining and finishing colour

Wood Database reports that it stains and finishes well. Heartwood is light to medium reddish brown against a paler, well-defined sapwood; the earlywood pores are large to very large, so expect bold grain lines under stain or oil.

Sustainability and handling

Wikipedia lists American elm as Endangered on the IUCN Red List, because of Dutch elm disease, while Wood Database states it is not on the Red List, so sources conflict; we follow the IUCN assessment cited on Wikipedia (checked 2026-09-30). Wood Database reports that it is not listed in the CITES Appendices. Elm in the Ulmus genus has been reported as a sensitizer; severe reactions are uncommon, with eye and skin irritation most common. The US National Cancer Institute reports strong and consistent associations between wood-dust exposure and nasal and sinus cancers, so use dust extraction and a respirator. Lumber from US trees falls under the Lacey Act. Salvaged disease-killed elm is a sensible source.

Popular projects

Wood Database lists boxes, baskets, furniture, hockey sticks, veneer, pulp and papermaking. Its splitting resistance and bending ability suit chair parts and rustic furniture.

Buying notes

Check the label: "elm" at a US yard is often red or white elm, sometimes mixed. Stocks are limited and irregular, so call ahead or look for urban sawyers. Prices ran from $3.20 to $4.95 a board foot in 4/4. For something harder, ask about Rock elm; for a related, more available wood with elm-like wavy pore bands, see Hackberry.