I dont have a definitive answer without a specific context. Felsite is a type of volcanic rock that is commonly used in construction applications such as building facades, cladding, and paving.

In general, felsite is considered to have good durability and weather resistance, making it suitable for use in outdoor environments. However, its resistance to frost can vary depending on factors such as the type of felsite, its porosity, and the specific climatic conditions in which it is used.

Some types of felsite may be more susceptible to frost damage than others, particularly those that are highly porous or that contain significant amounts of minerals that are prone to expansion and contraction during freeze-thaw cycles.

In conclusion, I suggest that if you want to use felsite in an application where frost resistance is a critical consideration, it is important to consult with experts in the stone industry to select the appropriate material and ensure that it is properly installed and maintained.