What is the primary factor influencing when TFIFRM thickness tests can be performed?

The primary factor influencing when thickness tests for Thermal Fireproofing Insulation and Fire-Resistant Material (TFIFRM) can be performed is stabilization. This refers to the curing or drying time needed for the fireproofing material to achieve its desired performance characteristics.

Before conducting thickness tests, it’s essential that the applied fireproofing material has set properly and reached its specified stable condition. Performing thickness tests on material that has not fully stabilized can yield inaccurate readings, leading to potential misassessment of the fireproofing's effectiveness.

While factors like temperature and humidity do impact the curing process and overall application properties, the stabilization phase is critical for ensuring consistent and reliable measurement of the material’s thickness. This is because only after stabilization can the material demonstrate its intended performance and characteristics, making measurement at this stage the most relevant and important.