Which is cheaper, foam brick or red brick?

Generally speaking, foam bricks are cheaper than red bricks.

Foam brick is made of foamed polystyrene, which is a lightweight and heat-insulating building material. Because its manufacturing cost is relatively low, it is cheaper.

Red brick is made of clay and has good strength and durability. Compared with foam brick, the manufacturing process of red brick is more complicated, so the price is usually higher.