Keep usable spare boards together with a record of the installed profile, dimensions, finish and location. A small reserve is most useful when a future installer can identify what it matches and how it was originally used. Unlabelled offcuts in an unsuitable storage corner are a much weaker maintenance resource than a deliberate handover package.
There is no universal spare-board percentage for every project. A straight floor, a detailed deck and a layout with special border pieces create different replacement needs. Agree the reserve with the designer, installer and owner before the remaining material is discarded or used elsewhere. The objective is practical repairability over time.
Distinguish installation allowance from maintenance stock
Installation allowance covers the work needed to complete the current layout, including cutting and selection. Maintenance stock is material intentionally retained after completion. Combining them into one unexplained percentage makes it difficult to know whether anything will remain when installation ends.
Discuss the reserve while preparing the order, then confirm what actually remains at handover. The installer may have needed more material for a revised detail or recovered more useful pieces than expected. The final record should describe real boards in storage, not simply repeat the original purchasing allowance.
Kaltimber supplies reclaimed Ulin decking and reclaimed Ulin flooring. These are different applications with different profiles and installation arrangements. A spare labelled only as Ulin is not sufficiently identified if the property uses several sections or finishes.
Retain pieces that can serve a realistic repair
Consider the lengths and shapes used in the completed work. Short offcuts may help explain a profile or finish, but they may not replace a full board in a visible run. Keep samples and replacement material distinguishable so nobody mistakes a useful reference piece for adequate repair stock.
Where the design includes a border, step or special junction, ask what starting material would be needed to remake that detail. A spare field board may not have the width or section required. The answer should come from the actual installation rather than a generic recommendation to keep a few pieces of everything.
Do not preserve unsuitable material merely to reach a nominal reserve quantity. Record condition and usable dimensions. A piece with an unusable end may still have a practical purpose, but its recoverable length should be clear. Future maintenance staff should not discover the limitation only after opening the floor or deck.
Record the profile as well as the face width
A photograph of the installed surface rarely reveals the full board section. Record thickness, width and relevant edge detail, together with the supplier's product reference. For flooring, identify the agreed joint configuration. For decking, note the supplied profile and any machining performed during installation.
Keep a labelled cross-section sample where practical. It can help a future professional understand the geometry without removing an installed board simply to investigate it. A photograph with a scale and a clear written dimension record is useful when retaining a physical sample is inconvenient.
Make clear which dimensions describe the supplied board and which describe the installed arrangement. A visible face dimension, a joint gap and the full machined width are not interchangeable. This distinction matters when a future enquiry is made by someone who did not participate in the original project.
Preserve the finish specification accurately
Record the selected surface finish and any products applied on site. Include the exact product name and available application record rather than a vague description such as natural oil. If the surface was left untreated, say so. The next maintenance decision should start from what was actually done.
Kaltimber's Exotic Finish combines smooth and rustic areas on the same board. A spare from that finish should be identified accordingly rather than treated as an inconsistent smooth board. The desired character is part of the specification and should remain understandable after the original design team has left.
Do not assume that stored spares will keep the same visible colour as exposed boards. Exposure and use can change appearance. The USDA Wood Handbook provides background on wood moisture behaviour and finishing; it does not guarantee a colour match for a particular replacement in a particular setting.
Expect appearance to need assessment
A reserve from the original project can preserve the same supplied profile and finish, but it cannot freeze the appearance of the installed surface. An outdoor deck and material kept under cover experience different conditions. Indoors, light, use and maintenance can also produce differences between locations.
Before a repair, compare the candidate board in the actual setting and discuss realistic expectations. Avoid presenting a photograph taken in different light as proof of an exact match. The choice may involve position, orientation and the surrounding pattern as well as the individual board's colour.
Kaltimber's showroom provides one documented example: replacement boards in its exposed deck harmonised in colour in approximately six months. That observation belongs to that deck and exposure history. It is not a promised timetable for every replacement, particularly for sheltered areas, finished surfaces or indoor flooring.
Store the reserve as material that will be used
Choose a protected, identifiable storage location and ask for storage guidance appropriate to the material and site. Avoid leaving boards in contact with persistent dampness or exposed to construction contamination. The reserve should remain accessible without becoming a convenient shelf for unrelated chemicals or wet equipment.
Support and stacking arrangements should suit the board lengths and available space. Do not force an improvised storage arrangement that bends pieces or makes retrieval unsafe. Heavy or awkward stacks should be handled by suitable personnel using an appropriate method.
Wood remains responsive to moisture conditions. Stored material may require assessment and conditioning before future use; being from the original order does not make it automatically ready for installation years later. The installer should review its present condition and the intended application when the repair is planned.
Make the handover record easy to find
Create one concise record linking the reserve to the property and installation areas. Include the supplier, order reference, completion date, product details, finish information and the location of the stored material. Add photographs showing the installed layout and the labelled reserve.
For a hotel or villa with several similar rooms, identify which areas use which material. A board suitable for one room may not match a later renovation elsewhere. Keep changes in the record rather than assuming the same product was used throughout the property.
Name the person or team responsible for the reserve. Maintenance material often disappears because nobody knows why it was retained. A clear label and location record can prevent it being discarded during a routine clear-out or used for an unrelated temporary task.
Preserve access and fixing information
Replacement stock is only part of repairability. Keep the installer’s information about fixing methods and any access constraints. Kaltimber's decking installation approach uses predrilling and screws. A future repair should be planned around the actual assembly and competent inspection, not an assumption that boards can simply be pulled up.
Record known service access points and relevant drawings where available. If a repair exposes a concealed issue, the responsible professional should address that condition rather than treating a replacement board as a complete solution. The reserve supports maintenance; it does not replace diagnosis of the underlying problem.
The installation and care resources are a useful starting point for a review. Retain project-specific instructions alongside them, especially where the installation includes unusual junctions or a product selected by another specialist.