Wood Species Guide
Bur Oak
Quercus macrocarpa
Also called: Burr Oak, Mossycup Oak, Mossy-cup Oak, Blue Oak (regional), White Oak (in the lumber trade)
What Bur Oak looks like
Heartwood is light to medium tan brown, sometimes with an olive cast, and the sapwood is a narrow band of pale cream. Old open-grown trees can show darker mineral streaks.
Grain and texture
Straight to slightly irregular grain with a coarse, open texture. Quartersawn faces show the big ray fleck that white oaks are known for.
Working Bur Oak: planing, cutting and gluing
Machines well with sharp tools, though the heavy, wide rays can chip on the planer at steep angles. It glues, screws and stains well. Pre-drill near the ends of boards, since the dense latewood can split.
Finishing Bur Oak: oil, film finishes and epoxy
Takes oil, stain and film finishes evenly, and it fumes and ceruses as well as any white oak. The pores are partly plugged, but a seal coat before an epoxy pour is still the safe move. Avoid steel wool and iron contact, which turns the tannins blue-black.
Durability, stability and Florida humidity
The heartwood holds up well against decay, which made bur oak a favorite for posts and barns on the prairie. It moves a fair amount across the grain. In Florida, let slabs acclimate in air conditioning and finish both faces.
Shop notes from our Fort Myers shop
Bur oak gets sold as plain white oak most of the time, but urban and farmstead trees give wide, character-rich slabs with gnarly figure. It makes a solid dining or conference table and takes a dark epoxy fill in checks nicely. Flatten in two rounds, because big oak slabs keep moving after the first pass. We don't stock it, but ask us and we can often source it.
Common uses for Bur Oak
Furniture, flooring, cabinets, barrels, fence posts, timber framing and live-edge tables.
Sustainability and CITES status
Not listed in the CITES Appendices. Rated Least Concern on the IUCN Red List and common across its range.
Safety and toxicity
- Skin irritation
- Eye irritation
- Respiratory / asthma
- Sensitizer (allergy builds with exposure)
Oak dust often irritates eyes, skin and airways, and some people become allergic with repeated exposure. Fine oak dust is one of the dusts linked to nasal cancer after long, heavy exposure, so keep it out of the air.
- In the shop
- Dust collection + mask or respirator when sanding; gloves if your skin reacts
- Food contact
- Use with care for cutting boards, bowls and utensils
General information, not medical advice. See a doctor if you have a reaction.
Like other oaks, the dust can irritate eyes, skin and airways, and a few people become sensitized over time. Run dust collection and wear a mask or respirator when sanding.
Bur Oak in stock now
Ask us. We can often source it.
We don't have Bur Oak listed online right now, but new slabs and lumber come in all the time and not everything makes it to the website. Tell us what you're building and we'll check our racks and suppliers.
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