Planed All Round Hardwood: A Complete Guide to Uses, Grades, and Buying

Planed All Round (PAR) hardwood is a versatile timber standard widely used in construction, furniture making, and finishing projects. This guide explains what PAR hardwood is, how it is graded, common applications, and practical tips for selecting and purchasing. Understanding PAR helps buyers compare products, estimate workability, and achieve consistent results in woodworking and building projects.

What Planed All Round Hardwood Is

Planed All Round hardwood refers to a specific timber product where the wood is milled to uniform dimensions and planed on all six faces, producing a smooth, square-edged board. The term “Planed All Round” distinguishes PAR from rough-sawn or warped stock, indicating consistent thickness and width with finished surfaces ready for further processing. This standardization improves accuracy for joinery, reduces finishing time, and enhances appearance in exposed applications.

PAR lumber is typically available in various species, including oak, maple, birch, and cherry, among others. The planing process removes imperfections and yields precise dimensions, while the rounded edges are often eased or squared depending on the intended use. The result is a stable, easy-to-work-with substrate suitable for cabinetry, trim, frames, and decorative elements.

How PAR Hardwood Is Graded

Quality in PAR hardwood is driven by grain pattern, absence of defects, and overall straightness. Common grading considerations include:

• Defect levels: knots, shakes, splits, and worm tracks are noted and classified. Higher-grade PAR has fewer defects.
• Straightness: boards should lie flat with minimal warp, bow, or twist.
• Moisture content: kiln-dried PAR is typically sold at specified moisture levels (often around 6–12%).
• Finish quality: surface planing quality, including smoothness and absence of planer chatter.

Grading systems vary by region and species. When selecting PAR, buyers should request a grade specification sheet from the supplier and verify that the lumber meets the project’s tolerances for thickness, width, and moisture content. This ensures predictable performance in glue-ups and finishes.

Common Uses Of PAR Hardwood

PAR hardwood is favored for projects requiring precise dimensions and visible surfaces. Typical applications include:

• Cabinetry and built-ins: uniform panels, face frames, and decorative moldings.
• Flooring and trim: ready-to-use planks and mouldings with minimal planing, reducing prep time.
• Furniture components: tabletops, legs, rails, and joinery elements where consistent thickness is advantageous.
• Structural woodwork: frames, brackets, and non-load-bearing components that benefit from stable dimensions.

For exterior or demanding structural uses, verify that the chosen PAR species has appropriate durability ratings and finishes suitable for weather exposure. Some PAR hardwood is treated or specially selected for exterior performance, while others are intended for indoor use only.

Choosing And Buying PAR Hardwood

Effective PAR selection hinges on aligning material properties with project requirements. Consider the following factors:

• Species and appearance: match wood grain, color, and density to the design intent. Oak, maple, and birch offer different aesthetics and workability.
• Dimensional tolerances: confirm exact thickness, width, and length ranges to ensure clean joints and consistent assembly.
• Moisture content: select kiln-dried PAR at a target MC to minimize movement after installation.
• Defect tolerance: decide acceptable levels of knots or heartwood variation for visible components.
• Finish goals: plan for sanding, staining, or clear finishing by understanding the surface quality of the PAR stock.

Practical buying tips include requesting examples or shorter pieces to assess planing quality, checking for cupping or bow, and consulting with the supplier about environmental certifications. If project timing is tight, consider stock that ships under a clear moisture specification with consistent batch timing to reduce finish variation.

Finishing And Maintenance Of PAR Hardwood

Proper finishing enhances PAR’s performance and appearance. The following steps help achieve durable results:

• Acclimation: allow PAR to acclimate in the target environment for several days to weeks to reduce post-installation movement.
• Surface preparation: start with a high-quality sand plan to achieve a smooth surface, avoiding deep scratches that complicate finishing.
• Sealing and staining: test finishes on a sample board to verify color, as PAR can absorb finishes unevenly due to grain density.
• Topcoats and protection: use a durable topcoat (polyurethane, varnish, or oil-based finishes) appropriate for indoor or outdoor use.
• Maintenance: regular cleaning and periodic refinishing extend life, particularly for high-traffic or exposed areas.

Careful handling during cutting and joinery helps preserve edge integrity. For outdoor PAR, select finishes engineered for weather resistance and consider protective decking-grade applications where warranted.

Environmental Considerations And Sourcing

Responsible sourcing matters in modern PAR purchases. Look for certifications and assurances that the hardwood is harvested from sustainably managed forests. Reputable suppliers may provide:

• Chain-of-custody certification: confirms the timber’s origin and processing path.
• FSC or PEFC endorsement: signals adherence to sustainable forestry practices.
• Low-emission milling: reduced volatile organic compounds (VOCs) during processing.

In addition to certifications, consider the proximity of the supplier to reduce transportation emissions and support local or regional timber industries. Environmental considerations align with long-term cost savings, market preference, and regulatory compliance for many projects.

Typical PAR Hardwood Specification Table

Understanding these specifications helps buyers compare PAR options effectively. When in doubt, request a technical data sheet from the supplier and verify that the product meets project requirements for dimension stability, finish quality, and environmental standards.