Quartersawn lumber

Quartersawn lumber is a specific method of cutting wood that maximizes strength, stability, and aesthetic appeal. This technique is especially valued in fine woodworking, cabinetry, and sauna construction due to its resistance to warping and its unique grain pattern. Understanding the advantages of quartersawn lumber can help you make better decisions when selecting materials for long-lasting and visually appealing wooden structures.

What Is Quartersawn Lumber?

Quartersawn lumber is produced by first cutting a log into quarters and then slicing each quarter at a perpendicular angle to the growth rings. This method results in boards where the growth rings appear nearly vertical — usually at a 60 to 90-degree angle to the board’s face. This orientation enhances the wood’s structural integrity and gives it a straight, uniform grain pattern.

Why It Matters in Sauna Construction

Sauna environments experience frequent exposure to high heat and humidity. Quartersawn lumber is especially suited for this application due to its dimensional stability. Unlike flatsawn lumber, which may warp or cup under extreme conditions, quartersawn boards resist expansion and contraction, making them ideal for sauna benches, walls, and ceilings.

Advantages of Quartersawn Lumber

• Increased Stability: Resists warping, cupping, and twisting.
• Enhanced Durability: Ideal for high-humidity and temperature fluctuations.
• Aesthetic Appeal: Showcases a tight, linear grain that is often preferred for its elegant appearance.
• Wear Resistance: Holds up better under heavy use, especially for flooring and benching.

Common Wood Species Used

Quartersawn lumber can be produced from many hardwoods and softwoods, but it’s most commonly found in oak, maple, and cedar. In saunas, quartersawn cedar is particularly prized for its resistance to decay and its pleasant, natural aroma.

Considerations and Cost

Because quartersawing yields less usable lumber from a log compared to flatsawing, it is generally more expensive. However, the benefits in performance and appearance often justify the higher cost, particularly in applications like sauna interiors where long-term performance is critical.

Conclusion

Quartersawn lumber is a premium choice for sauna construction and high-end woodwork due to its remarkable stability, durability, and aesthetic qualities. If you’re aiming to create a sauna that withstands the test of time while maintaining visual elegance, choosing quartersawn boards can be a wise investment.