Which of the following is NOT a reason for using asbestos in building materials?

The correct answer is that low cost is not a reason for using asbestos in building materials. While asbestos fibers are inexpensive to produce and have historically contributed to the low cost of construction materials, this was not the primary motivation for their use. The main reasons for incorporating asbestos into building materials primarily revolve around its unique physical and chemical properties.

Asbestos can withstand high temperatures, making it an ideal fireproofing material. Its excellent thermal and electrical insulating properties have made it invaluable in various applications where insulation is necessary. Additionally, asbestos is impervious to chemical attack, providing durability and resilience in environments where contact with corrosive substances occurs.

Therefore, although low cost may have been a factor in the choice of materials, it is not a fundamental property that would warrant the use of asbestos compared to its thermal resistance, insulation capabilities, and chemical inertness.