How to Prepare the Subbase Before Assembling Your Indoor Basketball Wooden Floor

A perfectly prepared subbase is the invisible foundation that determines the long-term performance and service life of any indoor basketball wooden floor. Before starting any assembly work on the wooden floor system, you must first conduct a comprehensive inspection of the original ground to identify any potential problems that could cause issues in the future. The first thing to check is the flatness of the subbase: using a long straight edge, you need to measure every part of the ground to make sure that the height difference over any two-meter span does not exceed the allowed limit. Even a tiny uneven spot that seems insignificant now can cause a noticeable bump on the wooden floor surface after assembly, which will disrupt the smooth movement of players and even lead to tripping hazards.
Moisture testing is the next essential step in subbase preparation, and it cannot be skipped under any circumstances. Excessive moisture trapped in the concrete subbase is one of the biggest enemies of a basketball wooden floor, as it will gradually seep into the wood and cause irreversible deformation, mold growth, or rotting. Professional moisture testing equipment should be used to measure the moisture content of the subbase at multiple points across the entire court area. If the moisture level is found to be too high, you must take measures to dry the subbase thoroughly, or install a high-performance moisture-proof system that can completely block the upward movement of moisture. Only after the moisture test shows that the subbase meets the required standards can you proceed to the next preparation step.
After the subbase is confirmed to be flat and dry, you need to clean the entire surface completely to remove all dust, debris, and small particles. Any leftover small stones or construction waste under the basketball wooden floor will create pressure points that can damage the support structure over time. Once the surface is fully cleaned, a continuous layer of heavy-duty moisture-proof membrane is laid out, with all overlapping seams carefully sealed to create a completely impermeable barrier. In some cases, a thin layer of self-leveling compound can also be applied on top of the subbase to further eliminate any remaining tiny uneven spots, creating a perfectly smooth and stable base that will provide consistent support for every part of the basketball wooden floor that will be assembled on top.