Before using slating materials, one should assess their ________?

Before using slating materials, it is essential to assess their movement. Slate is a natural stone that can be impacted by variations in temperature and moisture levels, which can cause it to move or shift over time. Understanding how slate might react in different environmental conditions is crucial for ensuring the longevity and stability of a roofing system. This assessment helps in determining whether the slate is suitable for a particular installation and how it will behave over time, particularly in terms of expansion and contraction.

While aspects such as weight, condition, and color are relevant to the overall evaluation of slating materials, movement directly correlates to the material's performance and durability in the long term. Assessing movement also helps to anticipate potential problems such as cracking or displacement, making it a key factor to consider before use.