What factor must be taken into account when calculating material needs for a subfloor?

When calculating material needs for a subfloor, it is crucial to account for waste percentage. During construction, it is common for materials to be damaged, cut incorrectly, or otherwise wasted. This means that the actual amount needed for a project will often exceed the square footage calculations. By adding a waste percentage to the total material requirement, contractors can ensure that they have sufficient materials on hand to complete the job without delays due to shortages.

While factors like weather conditions and building codes can impact the construction process overall, they do not specifically affect the calculation of material needs for the subfloor. Weather may influence scheduling and how materials are stored or used, while building codes dictate safety and structural considerations. However, the specific addition of a waste percentage directly addresses the practical realities of material management on the job site.