Which masonry material is considered a poor conductor of heat?

Masonry materials like concrete and brick are generally appreciated in construction and firefighting for their thermal properties. Both materials possess a relatively low thermal conductivity, meaning they do not easily allow heat to pass through them. This characteristic makes them effective in resisting heat transfer, which is crucial in fire situations as it helps protect structures and delays fire spread.

Concrete, due to its density and mass, has a capacity to absorb and retain heat, but it does not conduct heat efficiently, making it a poor conductor. Similarly, brick's structure also prevents quick heat transmission. Therefore, when comparing the two materials, they both exhibit a similar behavior concerning heat conduction, supporting the conclusion that they are both poor conductors of heat.

While glass is a different type of material with different properties, the focus here is on the masonry options, which are the correct emphasis for understanding heat conduction in this context.