Verify Project Dimensions and Layout
The first step in contractor material planning is a thorough verification of all project dimensions. While initial design drawings provide a good starting point, the contractor's site measurements are crucial for accuracy. Confirm the exact width and height of all walls receiving thermally modified wood. Account for any openings like windows and doors, and note their precise locations and sizes. Discuss how corners will be handled—whether mitered, butt-jointed, or finished with trim—as this impacts material lengths and quantities.
Consider the desired layout and orientation of the thermally modified wood. If a vertical application is planned, confirm the maximum available board lengths against the wall height. For horizontal layouts, discuss how board ends will be joined and staggered to create a visually appealing and structurally sound installation. These details directly influence the length and quantity of boards needed, as well as the amount of waste to anticipate.
Confirm Thermally Modified Wood Profiles and Species
Thermally modified wood is available in various profiles, such as tongue-and-groove, shiplap, or square-edge, each offering a distinct aesthetic and installation method. Confirm with your contractor the exact profile chosen for your project. For example, a tongue-and-groove profile (e.g., NORX Thermally Modified Spruce T&G) offers a secure, interlocking fit, while a shiplap profile (e.g., NORX Thermally Modified Spruce Shiplap) creates pronounced shadow lines.
Beyond the profile, the species of wood matters. Thermally modified spruce and pine are common options, each with unique grain patterns and characteristics. Verify that the selected species aligns with the desired appearance and performance expectations. For instance, if you've specified a specific look, ensure the contractor is planning to order that exact species and profile. This is also the stage to discuss any desired pre-finishing or specific finish applications, as some finishes are best applied before installation.
Detail Fastening and Substructure Requirements
The fastening method and substructure are integral to the thermally modified wood installation and directly affect material choices. Discuss with your contractor the type of fasteners to be used—exposed or concealed, stainless steel or other corrosion-resistant options. The specific profile of the thermally modified wood often dictates the most appropriate fastening system. For example, some tongue-and-groove profiles are designed for concealed fasteners, while square-edge boards typically require exposed fastening.
Review the substructure plan, including furring strips or battens, and confirm their material, spacing, and attachment to the building envelope. This is especially important for rainscreen applications, where an air gap is crucial for moisture management. Ensure the substructure provides adequate support for the thermally modified wood and aligns with the chosen fastening method. Discrepancies here can lead to installation challenges or compromise the long-term performance of the siding.
Calculate Material Quantities: A Worked Example
Accurate material quantity calculation is essential to avoid delays or excess waste. Work with your contractor to determine the precise linear footage or square footage needed, factoring in cuts, waste, and any necessary overage. A common practice is to add a percentage for waste, typically 5-10%, depending on the complexity of the installation and the profile chosen.
Consider a hypothetical project: covering an 18-foot wide by 9-foot high wall section with NORX Thermally Modified Spruce T&G siding, which comes in 1x6 (nominal) boards. The actual coverage width of a 1x6 T&G board is typically closer to 5 inches. The total wall area is 18 ft * 9 ft = 162 square feet. For vertical installation, each 9-foot length of board covers 5 inches (0.4167 feet) in width. To cover the 18-foot width, you would need 18 ft / 0.4167 ft/board = 43.2 boards. Since boards are purchased as full units, you would need 44 boards. If the product is available in 12-foot lengths, each board yields one 9-foot piece with a 3-foot offcut. Assuming some offcuts can be used for shorter sections or details, a 10% waste factor would mean purchasing 44 boards * 1.10 = 48.4 boards, rounded up to 49 boards. This calculation needs to be reviewed against actual product lengths available (e.g., 8-foot, 10-foot, 12-foot, 16-foot) to optimize ordering and minimize waste, especially for long runs.
Review Delivery, Storage, and Jobsite Access
Before placing the order, confirm logistical details with your contractor. Discuss the planned delivery schedule to ensure materials arrive when the site is ready and there's adequate space for proper storage. Thermally modified wood should be stored in a dry, well-ventilated area, protected from direct sunlight and moisture, and elevated off the ground. Improper storage can lead to warping or other damage.
Consider jobsite access for large delivery vehicles and the staging area for materials. If the site has restricted access, this may impact the delivery method or require additional planning for moving materials. A clear plan for receiving and storing materials helps prevent damage and keeps the project organized.
Final Documentation and Sign-Off
The final step in contractor material planning is to document all agreed-upon specifications. This includes the exact thermally modified wood product (species, profile, dimensions), quantities, fastening methods, substructure details, and any finishing requirements. A signed agreement or purchase order reflecting these details provides clarity for both parties and serves as a reference throughout the project.
Ensure the contractor has all necessary product documentation, including installation guidelines and maintenance recommendations. This collaborative review helps prevent misunderstandings and ensures that the order placed accurately reflects the project's needs. This shared understanding is vital for a smooth installation.
Before you order
- Have precise dimensions for all thermally modified wood surfaces been confirmed by the contractor?
- Is the exact thermally modified wood species and profile (e.g., NORX T&G, Shiplap) specified and agreed upon?
- Are fastening methods (exposed/concealed) and fastener types (e.g., stainless steel) clearly defined?
- Has the substructure (furring strips, battens) spacing and material been confirmed?
- Have material quantities been calculated with an appropriate waste factor, considering available product lengths?
- Is there a clear plan for material delivery, on-site storage, and protection from elements?
- Are all project specifications for thermally modified wood documented and signed off by both parties?
- Has the contractor reviewed all relevant product installation guides and recommendations?
- Are details for corner treatments, window/door transitions, and wall base/soffit connections finalized?
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
Why is a detailed material plan with my contractor so important for thermally modified wood?
A detailed plan ensures that the exact thermally modified wood product—correct species, profile, and dimensions—is ordered to match your design and the contractor's installation method. This prevents costly delays, material waste, and potential rework due to mismatched materials or incorrect quantities. It also clarifies responsibilities and expectations for both parties.
What kind of waste factor should I typically budget for when ordering thermally modified wood?
A typical waste factor for thermally modified wood projects ranges from 5% to 10%. This percentage accounts for cuts, trimming, and any unforeseen issues. For more complex designs with many angles, short pieces, or intricate patterns, a higher waste factor might be prudent. Always discuss this with your contractor, as their experience with similar projects will be invaluable.
Can I use thermally modified wood for both exterior siding and interior feature walls?
Yes, thermally modified wood is suitable for both exterior siding and interior feature walls. Its enhanced stability and durability make it a versatile choice. However, the specific profile, finish, and fastening methods might differ between interior and exterior applications. For exterior use, consider a rainscreen assembly. For interior walls, the focus might be more on aesthetics and ease of installation. Always confirm the intended application with your chosen product's specifications.
Ready to Plan Your Thermally Modified Wood Project?
Request a material quote with your project dimensions, desired profile, and ZIP code to confirm current availability and service options. Our team can assist you and your contractor in finalizing your material list.
Request a material quote →