Florida Home Inspector Practice Test 2026 – Comprehensive Exam Prep

When particleboard is used as wall sheathing, it must meet specific requirements to ensure safety and structural integrity. The designation of grades M-1 and M-2 indicates that the particleboard has been tested and meets industry standards for specific applications. M-1 refers to particleboard that is suitable for interior applications as it has a lower moisture resistance and is designed for dry conditions, while M-2 indicates that it possesses moderate resistance to moisture, allowing for limited exposure to damp environments.

The existence of these grading standards is crucial as they ensure that the materials used in construction projects have appropriate performance characteristics. Using properly graded particleboard helps in maintaining the durability and safety of the structure over time.

Other grades mentioned in the options do not correspond to the requirements for wall sheathing and would not be suitable or recognized for this specific application in the context of standard construction practices. Therefore, the correct identification of M-1 and M-2 as necessary grades assures compliance with building codes and standards relevant to wall sheathing materials.