Sweet and paper birch

Overview

Sweet birch and paper birch are the two other North American birches you are likely to meet as lumber. Sweet birch is hard and dense; paper birch is much lighter and softer. Both look like Yellow birch, with light reddish-brown heartwood, nearly white sapwood and a plain, uniform grain. Most yards sell them just as "birch".

Pros

• Easy to work: Wood Database says birch generally works easily with hand and machine tools and turns, glues and finishes well.
• Sweet birch is hard: 1,470 lbf, level with Hard maple (1,450) and above White oak (1,350).
• Paper birch is light (610 kg/m3) and pleasant to carve and plane.
• Inexpensive, in the same price range as maple or oak for plain lumber, according to Wood Database.

Cons

• Perishable for decay resistance, and susceptible to insect attack. Not for outdoor use.
• Plain, uniform appearance with low luster; little ring contrast.
• Paper birch is soft (910 lbf) and dents easily for tops and floors.
• Wild grain tears out during machining.
• Birch in the Betula genus has been reported as a sensitizer.

Variants and subspecies

• Sweet birch (Betula lenta, black or cherry birch): 1,470 lbf, 735 kg/m3, with 6.5% radial and 9.0% tangential shrinkage.
• Paper birch (Betula papyrifera, white or canoe birch): 910 lbf, 610 kg/m3, with 6.3% radial and 8.6% tangential shrinkage.
• Yellow birch is the main lumber species and is covered in Yellow birch.
• Other relatives listed by Wood Database include gray, river, silver and downy birch, plus Baltic birch and masur birch, which are separate products.
• Figured birch with a wide shallow curl exists and costs more.

Working and finishing

Generally easy. Sharp tools and light cuts control tear-out on wild grain. Glues and turns well. Sweet birch is dense enough to want pilot holes; paper birch is soft and can mark under clamps, so pad the jaws.

Staining and finishing colour

Wood Database says birch finishes well. There is little colour difference between growth rings, so the surface is uniform; paint and clear finishes show it best. For stain, test on scrap first and use a conditioner or gel stain if blotching appears, as with other fine, even-grained woods.

Sustainability and handling

Wood Database reports neither sweet nor paper birch is listed in the CITES Appendices or on the IUCN Red List; Wikipedia's taxoboxes show Least Concern for both (checked 2026-09-30). Wood Database reports birch in the Betula genus as a sensitizer, with skin and respiratory irritation the usual reactions. The US National Cancer Institute reports strong and consistent associations between wood-dust exposure and cancers of the nasal cavity and paranasal sinuses, so use dust extraction and a respirator. US and Canadian timber is covered by the Lacey Act.

Popular projects

Wood Database lists plywood, boxes, crates, turned objects, interior trim and small specialty items, and notes birch veneer is used for doors, furniture and paneling. In furniture, sweet birch suits drawers, frames and small pieces.

Buying notes

Sold simply as "birch", usually 4/4, at about $4.60 to $4.95 a board foot at one yard. You will rarely get a choice of species; if hardness matters, ask for sweet birch or yellow birch rather than paper birch. Avoid damp or outdoor-stored stock, since birch is perishable.