What are Jatoba Decking Specifications?
Jatoba decking specifications refer to the precise details that define the physical characteristics and properties of the wood product. These include the botanical name, origin, density, and resistance to environmental factors. For decking, the most practical specifications concern the board's dimensions and profile.
Jatoba, also known as Brazilian Cherry, is a high-strength, very durable hardwood originating from Brazil. It is naturally resistant to termites, mold, fungi, and weather changes. This inherent durability is a key specification that makes it suitable for exterior applications like decking. Its specific gravity is 0.94, and its air dry density is 4.67 lbs/bf. These properties contribute to its reputation for longevity, often exceeding 25 years.
Understanding these foundational specifications helps you appreciate the material's performance capabilities and why certain installation practices are recommended.
Available Profiles and Dimensions
Jatoba decking is typically offered in specific profiles and nominal dimensions, which translate to distinct finished sizes. The profile refers to the shape of the board, particularly its edges, which affects how boards join together and how fasteners are applied.
For Jatoba decking, a common available profile is 5/4"x6". This nominal dimension corresponds to an actual finished size of 1 inch x 5.5 inches. The term "nominal" is important; it represents a rough sawn size before milling, while the "actual" or "finished" dimension is what you will receive.
These boards are typically available in various lengths, ranging from 3 feet to 24 feet. All boards are Kiln Dried (KD), which helps stabilize the wood and reduce movement after installation. Confirming both the nominal and actual dimensions is essential for accurate project planning and material quantity calculations, especially when integrating with existing structures or specific design requirements.
Understanding Board Lengths and Waste Factor
Jatoba decking boards are supplied in a range of lengths, from 3 feet to 24 feet. When ordering, it's generally advisable to specify the range of lengths you need or to discuss your cut plan with your supplier to minimize waste. A mix of lengths can be efficient for various sections of a deck.
For example, if your deck requires many shorter pieces, ordering a selection of shorter boards can be more cost-effective than cutting down long boards, which results in significant offcuts. Conversely, for long, uninterrupted runs, longer boards reduce the number of seams and fasteners, potentially simplifying installation and improving aesthetic flow. Always factor in a waste percentage, typically 10-15%, for cuts, mistakes, and potential board defects, even with high-quality material like Jatoba.
Worked Example: Calculating Board Needs for a Deck Section
Let's consider a hypothetical deck section measuring 10 feet wide by 12 feet long. You've chosen Jatoba decking with a finished board dimension of 1 inch x 5.5 inches. You plan to lay the boards parallel to the 12-foot length.
First, determine how many boards are needed for the 10-foot width. Each board is 5.5 inches wide. We need to account for spacing between boards.
Convert the 10-foot width to inches: 10 feet * 12 inches/foot = 120 inches.
Since you cannot order partial boards, you'll need 21 boards for the width.
Each of these 21 boards needs to be 12 feet long. Therefore, for this 10x12 foot section, you would initially calculate 21 boards at 12 feet each. Factoring in a 10% waste for cuts and potential imperfections: 21 boards * 1.10 = 23.1 boards. Round up to 24 boards to ensure sufficient material.
When requesting a quote, you would ask for 24 boards of Jatoba decking, 1 inch x 5.5 inches, in 12-foot lengths, or a mix of lengths that can achieve this with minimal waste. This detailed calculation helps ensure you order enough material without excessive surplus.
Suitability and Installation Considerations
Jatoba's high strength and durability make it suitable for various outdoor applications, including industrial and heavy flooring, as well as exterior joinery. Its natural resistance to mold, fungi, and termites further enhances its suitability for outdoor environments where moisture and pests can be concerns.
However, its density also means that pre-drilling is recommended for fastening to prevent splitting. Jatoba's tannins may also complicate gluing, and slow drying is advised for any custom milling or finishing. These are practical considerations derived from the material's inherent specifications that impact installation methods and overall project planning.
When planning your deck, consider the type of fasteners compatible with its profile, whether face-fastening or hidden fasteners are preferred, and how those choices interact with the wood's density and hardness. Always refer to manufacturer guidelines for specific installation instructions.
Before you order
- Confirm the nominal and actual dimensions (e.g., 5/4"x6" nominal translates to 1"x5.5" actual).
- Identify the desired board profile (e.g., square edge, eased edge, or specific tongue-and-groove for hidden fasteners).
- Determine the range of lengths required to minimize cuts and waste (e.g., 3-24 ft available).
- Calculate the total linear footage needed, including a waste factor (typically 10-15%).
- Verify the wood's drying method (e.g., Kiln Dried - KD) for stability.
- Consider the wood's density and hardness for fastening methods (pre-drilling is recommended for Jatoba).
- Review any specific installation guidelines related to board spacing and ventilation for your chosen material.
- Account for any special finishing requirements or challenges (e.g., Jatoba's tannins with certain glues/finishes).
Confirm installation details, approved uses and warranty terms in the current instructions for the exact product and profile. Your installer should verify the substrate, structure and applicable project requirements.
Questions to help you decide
What is the difference between nominal and actual dimensions for Jatoba decking?
Nominal dimensions (e.g., 5/4"x6") refer to the rough sawn size before the wood is milled and planed. Actual dimensions (e.g., 1"x5.5") are the precise measurements of the finished board you will receive. Always use actual dimensions for accurate project calculations.
Why is pre-drilling recommended for Jatoba decking?
Jatoba is a very dense and high-strength hardwood. Pre-drilling creates a pilot hole for fasteners, preventing the wood from splitting when screws or nails are driven into it. This ensures a more secure and aesthetically pleasing installation.
Does Jatoba decking come in different profiles?
While the primary profile listed is 5/4"x6" with a finished size of 1"x5.5", specific profiles for decking can vary by supplier. These often include standard square-edge boards, sometimes with eased edges, or profiles designed for hidden fastening systems. Always confirm the exact profile and edge detail with your supplier before ordering.
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