Which material typically has low combustibility?

Concrete is considered to have low combustibility due to its composition and physical properties. As a non-combustible material, concrete does not ignite or burn, making it an ideal choice in construction, especially in fire-resistant applications. Its ability to withstand high temperatures without contributing to flames or smoke is critical in fire prevention and safety measures. This characteristic allows it to act as a barrier against fire spread, providing critical time for occupants to evacuate and for firefighters to respond.

In contrast, materials such as wood, plastic, and fibreglass have a higher propensity to catch fire and burn, which makes them less suitable for fire-resistant applications. While fibreglass can have some fire-resistant qualities depending on its formulation, it still carries an inherent risk of combustion compared to concrete.