What is a critical factor to consider when specifying materials for a mitigation system?

When specifying materials for a mitigation system, longevity and durability are critical factors because these attributes directly affect the system's effectiveness and long-term performance. The materials used in a mitigation system must be able to withstand varying environmental conditions and stressors over time. For instance, in radon mitigation, materials that deteriorate quickly can compromise the integrity of the system, leading to potential failures or the reentry of radon gas into the living space.

Additionally, durable materials reduce the need for frequent repairs or replacements, thereby saving costs and ensuring the system operates as intended without interruption. In contrast, while cost, aesthetic appeal, and ease of installation are important considerations, they do not outweigh the fundamental necessity of using materials that will last and maintain suitability for the intended application. A focus on longevity and durability ensures that the mitigation system will effectively protect the occupants and the structure in the long run.