noun
synthetic building material
Refers to modern, manufactured construction materials such as plywood, particle board, plastic panels, or composite materials, as opposed to traditional natural materials like solid wood or stone.
この家は新建材を多く使っているので、コストが抑えられています。
This house uses a lot of synthetic building materials, so the cost is kept down.
Synthetic building materials are easy to work with, but you need to pay attention to durability.